1
                                                                     EXHIBIT 4.2
                                                                  EXECUTION COPY
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                               PHASE METRICS, INC.

                              HELIOS, INCORPORATED
                       APPLIED ROBOTIC TECHNOLOGIES, INC.
                           AIR BEARINGS, INCORPORATED
                           SANTA BARBARA METRIC, INC.


            ---------------------------------------------------------


                                  $110,000,000

                         10-3/4% SENIOR NOTES DUE 2005
           ----------------------------------------------------------

                            ------------------------



                                    INDENTURE

                          DATED AS OF JANUARY 30, 1998

                             -----------------------



             STATE STREET BANK AND TRUST COMPANY OF CALIFORNIA, N.A.
                                     Trustee


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   2


                                TABLE OF CONTENTS


                                                                                              PAGE
                                                                                              ----
                                                                                        
ARTICLE 1 - DEFINITIONS AND INCORPORATION BY REFERENCE...........................................1

        SECTION 1.1   DEFINITIONS................................................................1
        SECTION 1.2   OTHER DEFINITIONS.........................................................17
        SECTION 1.3   INCORPORATION BY REFERENCE OF TRUST
                           INDENTURE ACT........................................................17
        SECTION 1.4   RULES OF CONSTRUCTION.....................................................18

ARTICLE 2 - THE NOTE............................................................................18

        SECTION 2.1   FORM AND DATING...........................................................18
        SECTION 2.2   EXECUTION AND AUTHENTICATION..............................................20
        SECTION 2.3   REGISTRAR AND PAYING AGENT................................................21
        SECTION 2.4   PAYING AGENT TO HOLD MONEY IN TRUST.......................................21
        SECTION 2.5   HOLDER LISTS..............................................................21
        SECTION 2.6   TRANSFER AND EXCHANGE.....................................................22
        SECTION 2.7   REPLACEMENT NOTES.........................................................35
        SECTION 2.8   OUTSTANDING NOTES.........................................................35
        SECTION 2.9   TREASURY NOTES............................................................36
        SECTION 2.10  TEMPORARY NOTES...........................................................36
        SECTION 2.11  CANCELLATION..............................................................36
        SECTION 2.12  DEFAULTED INTEREST........................................................37
        SECTION 2.13  RECORD DATE...............................................................37
        SECTION 2.14  COMPUTATION OF INTEREST...................................................37
        SECTION 2.15  CUSIP NUMBER..............................................................37

ARTICLE 3 - REDEMPTION AND PREPAYMENT...........................................................37

        SECTION 3.1   NOTICES TO TRUSTEE........................................................37
        SECTION 3.2   SELECTION OF NOTES TO BE REDEEMED OR PURCHASED............................38
        SECTION 3.3   NOTICE OF REDEMPTION......................................................38
        SECTION 3.4   EFFECT OF NOTICE OF REDEMPTION............................................39
        SECTION 3.5   DEPOSIT OF REDEMPTION OR PURCHASE PRICE...................................39
        SECTION 3.6   NOTES REDEEMED IN PART....................................................40
        SECTION 3.7   OPTIONAL REDEMPTION.......................................................40
        SECTION 3.8   MANDATORY REDEMPTION......................................................41
        SECTION 3.9   REPURCHASE OFFERS.........................................................41

ARTICLE 4 - COVENANTS...........................................................................43


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        SECTION 4.1   PAYMENT OF NOTES..........................................................43
        SECTION 4.2   MAINTENANCE OF OFFICE OR AGENCY...........................................43
        SECTION 4.3   COMMISSION REPORTS........................................................44
        SECTION 4.4   COMPLIANCE CERTIFICATE....................................................44
        SECTION 4.5   TAXES.....................................................................45
        SECTION 4.6   STAY, EXTENSION AND USURY LAWS............................................45
        SECTION 4.7   RESTRICTED PAYMENTS.......................................................46
        SECTION 4.8   DIVIDENDS AND OTHER PAYMENT RESTRICTIONS
                           AFFECTING RESTRICTED SUBSIDIARIES....................................48
        SECTION 4.9   INCURRENCE OF INDEBTEDNESS AND ISSUANCE OF
                           PREFERRED STOCK......................................................49
        SECTION 4.10  ASSET SALES...............................................................52
        SECTION 4.11  TRANSACTIONS WITH AFFILIATES..............................................53
        SECTION 4.12  LIENS.....................................................................54
        SECTION 4.13  OFFER TO PURCHASE UPON CHANGE OF CONTROL..................................54
        SECTION 4.14  CORPORATE EXISTENCE.......................................................55
        SECTION 4.15  LIMITATION ON ISSUANCES OF CAPITAL STOCK OF
                           WHOLLY-OWNED RESTRICTED SUBSIDIARIES.................................55
        SECTION 4.16  LIMITATIONS ON ISSUANCES OF GUARANTEES OF
                           INDEBTEDNESS.........................................................55
        SECTION 4.17  BUSINESS ACTIVITIES.......................................................56
        SECTION 4.18  ADDITIONAL GUARANTEES.....................................................56
        SECTION 4.19  PAYMENT FOR CONSENTS......................................................56

ARTICLE 5 - SUCCESSORS..........................................................................57

        SECTION 5.1   MERGER, CONSOLIDATION OF SALE OF ASSETS...................................57
        SECTION 5.2   SUCCESSOR CORPORATION SUBSTITUTED.........................................57

ARTICLE 6 - DEFAULTS AND REMEDIES...............................................................58

        SECTION 6.1   EVENTS OF DEFAULT.........................................................58
        SECTION 6.2   ACCELERATION..............................................................59
        SECTION 6.3   OTHER REMEDIES............................................................60
        SECTION 6.4   WAIVER OF PAST DEFAULTS...................................................60
        SECTION 6.5   CONTROL BY MAJORITY.......................................................61
        SECTION 6.6   LIMITATION ON SUITS.......................................................61
        SECTION 6.7   RIGHTS OF HOLDERS OF NOTES TO RECEIVE PAYMENT.............................61
        SECTION 6.8   COLLECTION SUIT BY TRUSTEE................................................62
        SECTION 6.9   TRUSTEE MAY FILE PROOFS OF CLAIM..........................................62
        SECTION 6.10  PRIORITIES................................................................63



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        SECTION 6.11  UNDERTAKING FOR COSTS.....................................................63

ARTICLE 7 - TRUSTEE.............................................................................63

        SECTION 7.1   DUTIES OF TRUSTEE.........................................................63
        SECTION 7.2   RIGHTS OF TRUSTEE.........................................................64
        SECTION 7.3   INDIVIDUAL RIGHTS OF TRUSTEE..............................................65
        SECTION 7.4   TRUSTEE'S DISCLAIMER......................................................65
        SECTION 7.5   NOTICE OF DEFAULTS........................................................66
        SECTION 7.6   REPORTS BY TRUSTEE TO HOLDERS OF THE NOTES................................66
        SECTION 7.7   COMPENSATION AND INDEMNITY................................................66
        SECTION 7.8   REPLACEMENT OF TRUSTEE....................................................67
        SECTION 7.9   SUCCESSOR TRUSTEE BY MERGER, ETC..........................................68
        SECTION 7.10  ELIGIBILITY; DISQUALIFICATION.............................................68
        SECTION 7.11  PREFERENTIAL COLLECTION OF CLAIMS AGAINST
                           THE COMPANY..........................................................69

ARTICLE 8 - LEGAL DEFEASANCE AND COVENANT DEFEASANCE............................................69

        SECTION 8.1   OPTION TO EFFECT LEGAL DEFEASANCE OR
                           COVENANT DEFEASANCE..................................................69
        SECTION 8.2   LEGAL DEFEASANCE AND DISCHARGE............................................69
        SECTION 8.3   COVENANT DEFEASANCE.......................................................70
        SECTION 8.4   CONDITIONS TO LEGAL OR COVENANT DEFEASANCE................................70
        SECTION 8.5   DEPOSITED MONEY AND GOVERNMENT SECURITIES TO BE
                           HELD IN  TRUST; OTHER MISCELLANEOUS PROVISIONS.......................71
        SECTION 8.6   REPAYMENT TO THE COMPANY..................................................72
        SECTION 8.7   REINSTATEMENT.............................................................72

ARTICLE 9 - AMENDMENT, SUPPLEMENT AND WAIVER....................................................73

        SECTION 9.1   WITHOUT CONSENT OF HOLDERS OF THE NOTES...................................73
        SECTION 9.2   WITH CONSENT OF HOLDERS OF NOTES..........................................73
        SECTION 9.3   COMPLIANCE WITH TRUST INDENTURE ACT.......................................75
        SECTION 9.4   REVOCATION AND EFFECT OF CONSENTS.........................................75
        SECTION 9.5   NOTATION ON OR EXCHANGE OF NOTES..........................................75
        SECTION 9.6   TRUSTEE TO SIGN AMENDMENTS, ETC...........................................75

ARTICLE 10 - GUARANTEE OF NOTES.................................................................76

        SECTION 10.1  NOTE GUARANTEE............................................................76
        SECTION 10.2  EXECUTION AND DELIVERY OF NOTE GUARANTEE..................................77


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        SECTION 10.3  SUBSIDIARY GUARANTORS MAY CONSOLIDATE, ETC.,
                           ON CERTAIN TERMS.....................................................77
        SECTION 10.4  RELEASES FOLLOWING SALE OF ASSETS, MERGER, SALE
                           OF CAPITAL STOCK ETC.................................................78
        SECTION 10.5  ADDITIONAL SUBSIDIARY GUARANTORS..........................................79
        SECTION 10.6  LIMITATION ON SUBSIDIARY GUARANTOR LIABILITY..............................79
        SECTION 10.7  "TRUSTEE" TO INCLUDE PAYING AGENT.........................................79

ARTICLE 11 - MISCELLANEOUS......................................................................80

        SECTION 11.1  TRUST INDENTURE ACT CONTROLS..............................................80
        SECTION 11.2  NOTICES...................................................................80
        SECTION 11.3  COMMUNICATION BY HOLDERS OF NOTES WITH
                           OTHER HOLDERS OFNOTES................................................81
        SECTION 11.4  CERTIFICATE AND OPINION AS TO CONDITIONS
                           PRECEDENT............................................................81
        SECTION 11.5  STATEMENTS REQUIRED IN CERTIFICATE OR OPINION.............................82
        SECTION 11.6  RULES BY TRUSTEE AND AGENTS...............................................82
        SECTION 11.7  NO PERSONAL LIABILITY OF DIRECTORS, OFFICERS,
                           EMPLOYEES AND STOCKHOLDERS...........................................82
        SECTION 11.8  GOVERNING LAW.............................................................82
        SECTION 11.9  NO ADVERSE INTERPRETATION OF OTHER AGREEMENTS.............................83
        SECTION 11.10 SUCCESSORS................................................................83
        SECTION 11.11 SEVERABILITY..............................................................83
        SECTION 11.12 COUNTERPART ORIGINALS.....................................................83
        SECTION 11.13 TABLE OF CONTENTS, HEADINGS, ETC..........................................83


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                                TABLE OF CONTENTS
                                   (CONTINUED)


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                                TABLE OF CONTENTS
                                   (CONTINUED)


                                                                                              PAGE
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        EXHIBITS:
        Exhibit A     FORMS OF NOTES
        Exhibit B     FORM OF CERTIFICATE OF TRANSFEROR
        Exhibit C     FORM OF CERTIFICATE OF EXCHANGE
        Exhibit D     FORM OF CERTIFICATE FROM ACQUIRING INSTITUTIONAL
                      ACCREDITED INVESTOR
        Exhibit E     FORM OF NOTE GUARANTEE
        Exhibit F     FORM OF SUPPLEMENTAL INDENTURE


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        Indenture, dated as of January 30, 1998, among PHASE METRICS, INC. (the
"Company"), HELIOS, INCORPORATED, APPLIED ROBOTIC TECHNOLOGIES, INC., AIR
BEARINGS, INCORPORATED and SANTA BARBARA METRIC, INC. (each, a "Subsidiary
Guarantor" and together with any other Subsidiary of the Company that executes a
Note Guarantee substantially in the form of EXHIBIT E attached hereto, the
"Subsidiary Guarantors") and State Street Bank and Trust Company of California,
N.A., as trustee (the "Trustee").

        The Company, the Subsidiary Guarantors and the Trustee agree as follows
for the benefit of each other and for the equal and ratable benefit of the
holders of the Company's 10-3/4% Senior Notes due 2005 (the "Senior Notes") and
the new 10 -3/4 % Senior Notes due 2005 (the "New Senior Notes") issuable upon
the exchange of the Senior Notes:


                                    ARTICLE 1

                          DEFINITIONS AND INCORPORATION
                                  BY REFERENCE

SECTION 1.1    DEFINITIONS.

        "Acquired Debt" means, with respect to any specified Person, (i)
Indebtedness of any other Person existing at the time such other Person is
merged with or into or became a Subsidiary of such specified Person, including,
without limitation, Indebtedness incurred in connection with, or in
contemplation of, such other Person merging with or into or becoming a
Subsidiary of such specified Person, and (ii) Indebtedness secured by a Lien
encumbering any asset acquired by such specified Person.

        "Affiliate" of any specified Person means any other Person directly or
indirectly controlling or controlled by or under direct or indirect common
control with such specified Person. For purposes of this definition, "control"
(including, with correlative meanings, the terms "controlling," "controlled by"
and "under common control with"), as used with respect to any Person, shall mean
the possession, directly or indirectly, of the power to direct or cause the
direction of the management or policies of such Person, whether through the
ownership of voting securities, by agreement or otherwise; provided that
beneficial ownership of 10% or more of the voting securities of a Person shall
be deemed to be control.

        "Agent" means any Registrar, Paying Agent or co-registrar.

        "Applicable Procedures" means, with respect to any transfer or exchange
of beneficial interests in a Global Note, the rules and procedures of the
Depositary that apply to such transfer and exchange.

        "Asset Sale" means (i) the sale, lease, conveyance or other disposition
of any assets or rights


   9


(including, without limitation, by way of a sale and leaseback) other than sales
of inventory in the ordinary course of business consistent with past practices
(provided that the sale, lease, conveyance or other disposition of all or
substantially all of the assets of the Company and its Restricted Subsidiaries
taken as a whole will be governed by the provisions of the Section 4.14 and/or
Article 5 and not by the provisions of Section 4.10), and (ii) the issue or sale
by the Company or any of its Restricted Subsidiaries of Equity Interests of any
of the Company's Restricted Subsidiaries, in the case of either clause (i) or
(ii), whether in a single transaction or a series of related transactions (a)
that have a fair market value in excess of $1.0 million or (b) for net proceeds
in excess of $1.0 million. Notwithstanding the foregoing: (i) a transfer of
assets by the Company to a Wholly Owned Restricted Subsidiary or by a Wholly
Owned Restricted Subsidiary to the Company or to another Wholly Owned Restricted
Subsidiary, (ii) an issuance of Equity Interests by a Wholly Owned Restricted
Subsidiary to the Company or to another Wholly Owned Restricted Subsidiary,
(iii) a sale and leaseback of the real estate (and personal property associated
with such real estate) owned by the Company in San Diego, California on which
the Company's headquarters is located on the date of the Indenture, and (iv) a
Restricted Payment that is permitted by Section 4.7 will not be deemed to be
Asset Sales.

        "Attributable Debt" in respect of a sale and leaseback transaction
means, at the time of determination, the present value (discounted at the rate
of interest implicit in such transaction, determined in accordance with GAAP) of
the obligation of the lessee for net rental payments during the remaining term
of the lease included in such sale and leaseback transaction (including any
period for which such lease has been extended or may, at the option of the
lessor, be extended).

        "Bankruptcy Law" means Title 11, U.S. Code or any similar federal or
state law for the relief of debtors.

        "Board of Directors" means the board of directors of the Company or any
authorized committee of such board of directors.

        "Broker-Dealer" has the meaning set forth in the Registration Rights
Agreement.

        "Business Day" means any day other than a Legal Holiday.

        "Capital Lease Obligation" means, at the time any determination thereof
is to be made, the amount of the liability in respect of a capital lease that
would at such time be required to be capitalized on a balance sheet in
accordance with GAAP.

        "Capital Stock" means (i) in the case of a corporation, corporate stock,
(ii) in the case of an association or business entity, any and all shares,
interests, participations, rights or other equivalents (however designated) of
corporate stock, (iii) in the case of a partnership or limited liability
company, partnership or membership interests (whether general or limited) and
(iv) any other interest or participation that confers on a Person the right to
receive a share of the profits and losses of, or distributions of assets of, the
issuing Person.



                                      -2-
   10

        "Cash Equivalents" means (i) United States dollars, (ii) securities
issued or directly and fully guaranteed or insured by the United States
government or any agency or instrumentality thereof having maturities of not
more than one year from the date of acquisition, (iii) certificates of deposit
and eurodollar time deposits with maturities of one year or less from the date
of acquisition, bankers' acceptances with maturities not exceeding six months
and overnight bank deposits, in each case with any lender party to the New
Credit Facility or with any domestic commercial bank having capital and surplus
in excess of $500 million and a Thompson Bank Watch Rating of "B" or better,
(iv) repurchase obligations with a term of not more than seven days for
underlying securities of the types described in clauses (ii) and (iii) above
entered into with any financial institution meeting the qualifications specified
in clause (iii) above, and (v) commercial paper having the highest rating
obtainable from Moody's Investors Service, Inc. or Standard & Poor's Rating
Services and in each case maturing within 270 days after the date of
acquisition.

        "Cedel" means Cedel Bank, societe anonyme.

        "Change of Control" means the occurrence of any of the following: (i)
the sale, lease, transfer, conveyance or other disposition (other than by way of
merger or consolidation), in one or a series of related transactions, of all or
substantially all of the assets of the Company and its Subsidiaries taken as a
whole to any "person" (as such term is used in Section 13(d)(3) of the Exchange
Act) other than the Principals or their Related Parties (as defined below), (ii)
the adoption of a plan relating to the liquidation or dissolution of the
Company, (iii) the consummation of any transaction (including, without
limitation, any merger or consolidation) the result of which is that any
"person" (as defined above), other than the Principals and their Related
Parties, becomes the "beneficial owner" (as such term is defined in Rule 13d-3
and Rule 13d-5 under the Exchange Act, except that a person shall be deemed to
have "beneficial ownership" of all securities that such person has the right to
acquire, whether such right is currently exercisable or is exercisable only upon
the occurrence of a subsequent condition), directly or indirectly, of more than
50% of the Voting Stock of the Company (measured by voting power rather than
number of shares), (iv) the first day on which a majority of the members of the
Board of Directors of the Company are not Continuing Directors or (v) the
Company consolidates with, or merges with or into, any Person or sells, assigns,
conveys, transfers, leases or otherwise disposes of all or substantially all of
its assets to any Person, or any Person consolidates with, or merges with or
into, the Company, in any such event pursuant to a transaction in which any of
the outstanding Voting Stock of the Company is converted into or exchanged for
cash, securities or other property, other than any such transaction where the
Voting Stock of the Company outstanding immediately prior to such transaction is
converted into or exchanged for Voting Stock (other than Disqualified Stock) of
the surviving or transferee Person constituting a majority of the outstanding
shares of such Voting Stock of such surviving or transferee Person (immediately
after giving effect to such issuance).

        "Commission" means the Securities and Exchange Commission.

        "Company" means Phase Metrics, Inc., a Delaware corporation.


                                      -3-
   11

        "Consolidated Cash Flow" means, with respect to any Person for any
period, the Consolidated Net Income of such Person for such period plus, to the
extent deducted in computing Consolidated Net Income, (i) provision for taxes
based on income or profits of such Person and its Restricted Subsidiaries for
such period, (ii) Fixed Charges of such Person for such period, (iii)
depreciation and amortization (including amortization of goodwill and other
intangibles) and all other non-cash charges (excluding any such non-cash charge
to the extent that it represents (A) an accrual of or reserve for cash charges
in any future period, or (B) amortization of a prepaid cash expense that was
paid in a prior period), (iv) any gain realized in connection with any Asset
Sale and any extraordinary or non-recurring gain, in each case, on a
consolidated basis determined in accordance with GAAP; and (v) the amount of any
non-cash compensation expense incurred in connection with issuances of
securities under stock option, stock purchase and other equity-based incentive
plans. Notwithstanding the foregoing, the provision for taxes based on the
income or profits of, the Fixed Charges of, and the depreciation and
amortization and other non-cash charges of a Restricted Subsidiary of, a Person
shall be added to Consolidated Net Income to compute Consolidated Cash Flow only
to the extent (and in same proportion) that the Net Income of such Restricted
Subsidiary was included in calculating the Consolidated Net Income of such
Person.

        "Consolidated Interest Expense" means, with respect to any Person for
any period, the sum of: (i) the interest expense of such Person and its
Restricted Subsidiaries for such period, on a consolidated basis, determined in
accordance with GAAP (including amortization of original issue discount,
non-cash interest payments, the interest component of all payments associated
with Capital Lease Obligations, imputed interest with respect to Attributable
Debt, commissions, discounts and other fees and charges incurred in respect of
letter of credit or bankers' acceptance financings, and net payments (if any)
pursuant to Hedging Obligations; provided, however, that in no event shall any
amortization of deferred financing costs be included in Consolidated Interest
Expense) and (ii) consolidated interest expense of such Person and its
Restricted Subsidiaries that was capitalized during such period, whether paid or
accrued.

        "Consolidated Net Income" means, with respect to any Person for any
period, the aggregate of the Net Income of such Person and its Restricted
Subsidiaries for such period, on a consolidated basis, determined in accordance
with GAAP; provided that (i) the Net Income (but not loss) of any Person that is
not a Restricted Subsidiary or that is accounted for by the equity method of
accounting shall be included only to the extent of the amount of dividends or
distributions paid in cash to the referent Person or a Wholly Owned Restricted
Subsidiary thereof, (ii) the Net Income of any Restricted Subsidiary shall be
excluded to the extent that the declaration or payment of dividends or similar
distributions by that Restricted Subsidiary of that Net Income is not at the
date of determination permitted without any prior governmental approval (that
has not been obtained) or, directly or indirectly, by operation of the terms of
its charter or any agreement, instrument, judgment, decree, order, statute, rule
or governmental regulation applicable to that Subsidiary or its stockholders,
(iii) the Net Income of any Person acquired in a pooling of interests
transaction for any period prior to the date of such acquisition shall be
excluded, (iv) the cumulative effect of a change in accounting principles shall
be excluded, and (v) the Net Income of any Unrestricted Subsidiary 



                                      -4-
   12

shall be excluded, whether or not distributed to the referent Person or one of
its Restricted Subsidiaries for purposes of Section 4.9 hereof and shall be
included for purposes of Section 4.7 hereof only to the extent of the amount of
dividends or distributions paid in cash to the referent Person or one of its
Restricted Subsidiaries.

        "Consolidated Net Worth" means, with respect to any Person as of any
date, the sum of (i) the consolidated equity of the common stockholders of such
Person and its consolidated Subsidiaries as of such date plus (ii) the
respective amounts reported on such Person's balance sheet as of such date with
respect to any series of preferred stock (other than Disqualified Stock) that by
its terms is not entitled to the payment of dividends unless such dividends may
be declared and paid only out of net earnings in respect of the year of such
declaration and payment, but only to the extent of any cash received by such
Person upon issuance of such preferred stock, less (x) all write-ups (other than
write-ups resulting from foreign currency translations and write-ups of tangible
assets of a going concern business made within 12 months after the acquisition
of such business) subsequent to the date hereof in the book value of any asset
owned by such Person or a consolidated Subsidiary of such Person, (y) all
investments as of such date in unconsolidated Subsidiaries and in Persons that
are not Subsidiaries (except, in each case, Permitted Investments), and (z) all
unamortized debt discount and expense and unamortized deferred charges as of
such date, all of the foregoing determined in accordance with GAAP.

        "Continuing Directors" means, as of any date of determination, any
member of the Board of Directors of the Company who (i) was a member of such
Board of Directors on the date hereof, or (ii) was nominated for election or
elected to such Board of Directors with the approval of a majority of the
Continuing Directors who were members of such Board at the time of such
nomination or election.

        "Corporate Trust Office of the Trustee" shall be at the address of the
Trustee specified in Section 11.2 hereof or such other address as to which the
Trustee may give notice to the Company.

        "Default" means any event that is or with the passage of time or the
giving of notice or both would be an Event of Default.

        "Definitive Notes" means either the Restricted Definitive Notes or the
Unrestricted Definitive Notes.

        "Depositary" means, with respect to the Notes issuable or issued in
whole or in part in global form, the Person specified in Section 2.3 hereof as
the Depositary with respect to the Notes, until a successor shall have been
appointed and become such pursuant to Section 2.6 of this Indenture, and,
thereafter, "Depositary" shall mean or include such successor.

        "Disqualified Stock" means any Capital Stock that, by its terms (or by
the terms of any security into which it is convertible or for which it is
exchangeable), or upon the happening of any 


                                      -5-
   13

event, matures or is mandatorily redeemable, pursuant to a sinking fund
obligation or otherwise, or redeemable at the option of the Holder thereof, in
whole or in part, on or prior to the date that is 91 days after the date on
which the Notes mature; provided, however, that any Capital Stock that would not
qualify as Disqualified Stock but for change of control provisions shall not
constitute Disqualified Stock if the provisions are not more favorable to the
holders of such Capital Stock than the provisions described under Section 4.13
hereof.

        "DLJ" means Donaldson, Lufkin & Jenrette Securities Corporation.

        "Equity Interests" means Capital Stock and all warrants, options or
other rights to acquire Capital Stock (but excluding any debt security that is
convertible into, or exchangeable for, Capital Stock).

        "Euroclear" means Morgan Guaranty Trust Company of New York, the
Brussels office, as operator of the Euroclear system.

        "Exchange Act" means the Securities Exchange Act of 1934, as amended.

        "Exchange Offer" means the offer by the Company to Holders to exchange
Senior Notes for New Senior Notes.

        "Exchange Offer Registration Statement" has the meaning set forth in the
Registration Rights Agreement.

        "Existing Indebtedness" means Indebtedness of the Company and its
Subsidiaries (other than Indebtedness under the New Credit Facility) in
existence on the date hereof, until such amounts are repaid.

        "Fixed Charges" means, with respect to any Person for any period, the
sum, without duplication, of (i) the Consolidated Interest Expense of such
Person for such period and (ii) any interest expense on Indebtedness of another
Person that is guaranteed by the referent Person or one of its Restricted
Subsidiaries or secured by a Lien on assets of such Person or one of its
Restricted Subsidiaries (whether or not such guarantee or Lien is called upon)
and (iii) the product of (A) all cash dividend payments of the Company and any
Subsidiary Guarantor on any series of preferred stock of the Company or such
Guarantor times (B) a fraction, the numerator of which is one and the
denominator of which is one minus the then current combined federal, state and
local statutory tax rate of such Person, expressed as a decimal, in each case,
on a consolidated basis and in accordance with GAAP.

        "Fixed Charge Coverage Ratio" means with respect to any Person for any
period, the ratio of the Consolidated Cash Flow of such Person and its
Restricted Subsidiaries for such period to the Fixed Charges of such Person and
its Restricted Subsidiaries for such period. In the event that the Company or
any of its Restricted Subsidiaries incurs, assumes, guarantees, redeems or
repays any 



                                      -6-
   14

Indebtedness (other than revolving credit borrowings) or issues or redeems
preferred stock subsequent to the commencement of the period for which the Fixed
Charge Coverage Ratio is being calculated but prior to the date on which the
event for which the calculation of the Fixed Charge Coverage Ratio is made (the
"Calculation Date"), then the Fixed Charge Coverage Ratio shall be calculated
giving pro forma effect to such incurrence, assumption, guarantee, redemption or
repayment of Indebtedness, or such issuance or redemption of preferred stock, as
if the same had occurred at the beginning of the applicable four-quarter
reference period. In addition, for purposes of making the computation referred
to above, (i) acquisitions that have been made by the Company or any of its
Subsidiaries, including through mergers or consolidations and including any
related financing transactions, during the four-quarter period or subsequent to
such reference period and on or prior to the Calculation Date shall be deemed to
have occurred on the first day of the four-quarter reference period and
Consolidated Cash Flow for such reference period shall be calculated without
giving effect to clause (iii) of the proviso set forth in the definition of
Consolidated Net Income, and (ii) the Consolidated Cash Flow attributable to
discontinued operations, as determined in accordance with GAAP, and operations
or businesses disposed of prior to the Calculation Date, shall be excluded, and
(iii) the Fixed Charges attributable to discontinued operations, as determined
in accordance with GAAP, or operations or businesses disposed of prior to the
Calculation Date, shall be excluded, but only to the extent that the obligations
giving rise to such Fixed Charges will not be obligations of the referent Person
or any of its Subsidiaries following the Calculation Date.

        "Foreign Subsidiary" means a Subsidiary that is formed under the laws of
the United States of America or of a state or territory thereof, but shall
exclude any Subsidiary which is treated as a partnership or branch for United
States federal income tax purposes.

        "GAAP" means generally accepted accounting principles set forth in the
opinions and pronouncements of the Accounting Principles Board of the American
Institute of Certified Public Accountants and statements and pronouncements of
the Financial Accounting Standards Board or in such other statements by such
other entity as have been approved by a significant segment of the accounting
profession, which are in effect on the date hereof.

        "Global Notes" means the U.S. Global Notes, the Regulation S Temporary
Global Notes, the Regulation S Permanent Global Notes and the Unrestricted
Global Notes.

        "Government Securities" means direct obligations of, or obligations
guaranteed by, the United States of America for the payment of which guarantee
or obligations the full faith and credit of the United States is pledged.

        "Guarantee" means a guarantee (other than by endorsement of negotiable
instruments for collection in the ordinary course of business), direct or
indirect, in any manner (including, without limitation, letters of credit and
reimbursement agreements in respect thereof), of all or any part of any
Indebtedness.



                                      -7-
   15

        "Hedging Obligations" means, with respect to any Person, the obligations
of such Person under (i) interest rate swap agreements, interest rate cap
agreements and interest rate collar agreements and (ii) other agreements or
arrangements designed to protect such Person against fluctuations in interest
rates or currency rates.

        "Holder" means a Person in whose name a Note is registered.

        "Indebtedness" means, with respect to any Person, any indebtedness of
such Person, whether or not contingent, in respect of borrowed money or
evidenced by bonds, notes, debentures or similar instruments or letters of
credit (or reimbursement agreements in respect thereof) or banker's acceptances
or representing Capital Lease Obligations or the balance deferred and unpaid of
the purchase price of any property or representing any Hedging Obligations,
except any such balance that constitutes an accrued expense or trade payable, if
and to the extent any of the foregoing indebtedness (other than letters of
credit and Hedging Obligations) would appear as a liability upon a balance sheet
of such Person prepared in accordance with GAAP, as well as all indebtedness of
others secured by a Lien on any asset of such Person (whether or not such
indebtedness is assumed by such Person) and, to the extent not otherwise
included, the Guarantee by such Person of any indebtedness of any other Person.
The amount of any Indebtedness outstanding as of any date shall be (i) the
accreted value thereof, in the case of any Indebtedness that does not require
current payments of interest, and (ii) the principal amount thereof, together
with any interest thereon that is more than 30 days past due, in the case of any
other Indebtedness.

        "Indenture" means this Indenture, as amended or supplemented from time
to time.

        "Indirect Participant" means a Person who holds an interest through a
Participant.

        "Initial Purchaser" means Donaldson, Lufkin & Jenrette Securities
Corporation.

        "Insolvency or Liquidation Proceedings" means (i) any insolvency or
bankruptcy case or proceeding, or any receivership, liquidation, reorganization
or other similar case or proceeding, relative to the Company or to the creditors
of the Company, as such, or to the assets of the Company, or (ii) any
liquidation, dissolution, reorganization or winding up of the Company, whether
voluntary or involuntary and involving insolvency or bankruptcy, or (iii) any
assignment for the benefit of creditors or any other marshaling of assets and
liabilities of the Company.

        "Institutional Accredited Investor" means an institutional "accredited
investor" as defined in Rule 501(a)(1), (2), (3) or (7) under the Securities
Act.

        "Investments" means, with respect to any Person, all investments by such
Person in other Persons (including Affiliates) in the forms of direct or
indirect loans (including guarantees of Indebtedness or other obligations),
advances or capital contributions (excluding commission, travel and similar
advances to officers and employees made in the ordinary course of business),
purchases or other acquisitions for consideration of Indebtedness, Equity
Interests or other securities, together 



                                      -8-
   16

with all items that are or would be classified as investments on a balance sheet
prepared in accordance with GAAP. If the Company or any Restricted Subsidiary of
the Company sells or otherwise disposes of any Equity Interests of any direct or
indirect Restricted Subsidiary of the Company such that, after giving effect to
any such sale or disposition, such Person is no longer a Restricted Subsidiary
of the Company, the Company shall be deemed to have made an Investment on the
date of any such sale or disposition equal to the fair market value of the
Equity Interests of such Restricted Subsidiary not sold or disposed of in an
amount determined as provided in the final paragraph of the covenant described
under Section 4.7 hereof.

        "Legal Holiday" means a Saturday, a Sunday or a day on which banking
institutions in the City of New York, the city in which the Corporate Trust
Office of the Trustee is located or at a place of payment are authorized by law,
regulation or executive order to remain closed. If a payment date is a Legal
Holiday at a place of payment, payment shall be made at that place on the next
succeeding day that is not a Legal Holiday, and no interest shall accrue for the
intervening period.

        "Lien" means, with respect to any asset, any mortgage, lien, pledge,
charge, security interest or encumbrance of any kind in respect of such asset,
whether or not filed, recorded or otherwise perfected under applicable law
(including any conditional sale or other title retention agreement, any lease in
the nature thereof, any option or other agreement to sell or give a security
interest in and any filing of or agreement to give any financing statement under
the Uniform Commercial Code (or equivalent statutes) of any jurisdiction).

        "Liquidated Damages" means all liquidated damages then owing pursuant to
Section 5 of the Registration Rights Agreement.

        "Net Income" means, with respect to any Person, the net income (loss) of
such Person, determined in accordance with GAAP and before any reduction in
respect of preferred stock dividends, excluding, however, (i) any gain (but not
loss), together with any related provision for taxes on such gain (but not
loss), realized in connection with (a) any Asset Sale (including, without
limitation, dispositions pursuant to sale and leaseback transactions) or (b) the
disposition of any securities by such Person or any of its Restricted
Subsidiaries or the extinguishment of any Indebtedness of such Person or any of
its Restricted Subsidiaries and (ii) any extraordinary or nonrecurring gain (but
not loss), together with any related provision for taxes on such extraordinary
or nonrecurring gain (but not loss).

        "Net Proceeds" means the aggregate cash proceeds received by the Company
or any of its Restricted Subsidiaries in respect of any Asset Sale (including,
without limitation, any cash received upon the sale or other disposition of any
non-cash consideration received in any Asset Sale), net of the direct costs
relating to such Asset Sale (including, without limitation, legal, accounting
and investment banking fees, and sales commissions) and any relocation expenses
incurred as a result thereof, taxes paid or payable as a result thereof (after
taking into account any available tax credits or deductions and any tax sharing
arrangements), and any reserve for adjustment in respect of the sale price of
such asset or assets established in accordance with GAAP.



                                      -9-
   17

        "New Credit Facility" means that certain Credit Facility, dated as of
January 30, 1998, by and among the Company, certain financial institutions and
Fleet National Bank, as agent, including any related notes, guarantees,
collateral documents, instruments and agreements executed in connection
therewith, and in each case as amended, modified, renewed, refunded, replaced or
refinanced from time to time.

        "New Senior Notes" means the Company's 10 -3/4 % Senior Notes due 2005,
which will be issued in exchange for the Company's Senior Notes.

        "Non-Recourse Debt" means Indebtedness (i) as to which neither the
Company nor any of its Restricted Subsidiaries (a) provides credit support of
any kind (including any undertaking, agreement or instrument that would
constitute Indebtedness), (b) is directly or indirectly liable (as a guarantor
or otherwise), or (c) constitutes the lender; (ii) no default with respect to
which (including any rights that the holders thereof may have to take
enforcement action against an Unrestricted Subsidiary) would permit (upon
notice, lapse of time or both) any holder of any other Indebtedness (other than
the Notes) of the Company or any of its Restricted Subsidiaries to declare a
default on such other Indebtedness or cause the payment thereof to be
accelerated or payable prior to its stated maturity; and (iii) as to which the
lenders have been notified in writing that they will not have any recourse to
the stock or assets of the Company or any of its Restricted Subsidiaries.

        "Note Custodian" means the Trustee, when serving as custodian for the
Depositary with respect to the Notes in global form, or any successor entity
thereto.

        "Notes" means the Senior Notes or the New Senior Notes, as applicable.

        "Obligations" means any principal, interest, penalties, fees,
indemnifications, reimbursements, damages and other liabilities payable under
the documentation governing any Indebtedness.

        "Offering" means the offer and sale of the Senior Notes as contemplated
by the Offering Memorandum.

        "Offering Memorandum" means the Offering Memorandum, dated January 23,
1998, relating to the Company's offering and placement of the Senior Notes.

        "Officer" means, with respect to any Person, the Chairman of the Board,
the Chief Executive Officer, the President, the Chief Operating Officer, the
Chief Financial Officer, the Treasurer, any Assistant Treasurer, the Controller,
the Secretary or any Vice-President of such Person.

        "Officers' Certificate" means a certificate signed on behalf of the
Company by two Officers of the Company, one of whom must be the principal
executive officer, the principal financial officer, the treasurer or the
principal accounting officer of the Company, that meets the requirements of
Section 11.5 hereof.



                                      -10-
   18

        "Opinion of Counsel" means an opinion from legal counsel who is
reasonably acceptable to the Trustee, that meets the requirements of Section
11.5 hereof. The counsel may be an employee of or counsel to the Company, any
Subsidiary of the Company or the Trustee.

        "Pari Passu Indebtedness" means Indebtedness of the Company that ranks
pari passu in right of payment to the Notes.

        "Participant" means, with respect to DTC, Euroclear or Cedel, a Person
who has an account with DTC, Euroclear or Cedel, respectively (and, with respect
to DTC, shall include Euroclear and Cedel).

        "Permitted Business" means any of the businesses and any other
businesses related to the businesses engaged in by the Company and its
respective Restricted Subsidiaries on the date hereof.

        "Permitted Investments" means (a) any Investment in the Company or in a
Subsidiary Guarantor and Investments in Wholly-Owned Restricted Subsidiaries
which are not Subsidiary Guarantors permitted under clauses (vii) or (ix) of
Section 4.9; (ii) any Investment in Cash Equivalents; (iii) any Investment by
the Company or any Restricted Subsidiary of the Company in a Person, if as a
result of such Investment (a) such Person becomes a Guarantor or (b) such Person
is merged, consolidated or amalgamated with or into, or transfers or conveys
substantially all of its assets to, or is liquidated into, the Company or a
Guarantor; (iv) any Investment made as a result of the receipt of non-cash
consideration from an Asset Sale that was made pursuant to and in compliance
with Section 4.10; (v) any acquisition of assets solely in exchange for the
issuance of Equity Interests (other than Disqualified Stock) of the Company; and
(vi) other Investments made after the date hereof in any Person having an
aggregate fair market value (measured on the date each such Investment was made
and without giving effect to subsequent changes in value), when taken together
with all other Investments made pursuant to this clause (vi) that are at the
time outstanding, not in excess of $5.0 million.

        "Permitted Liens" means (i) Liens securing Indebtedness under the New
Credit Facility that was permitted by the terms of this Indenture to be incurred
or other Indebtedness allowed to be incurred under clause (i) of Section 4.9
hereof; (ii) Liens in favor of the Company; (iii) Liens on property of a Person
existing at the time such Person is merged into or consolidated with the Company
or any Restricted Subsidiary of the Company; provided that such Liens were in
existence prior to the contemplation of such merger or consolidation and do not
extend to any assets other than those of the Person merged into or consolidated
with the Company; (iv) Liens on property existing at the time of acquisition
thereof by the Company or any Restricted Subsidiary of the Company, provided
that such Liens were in existence prior to the contemplation of such
acquisition; (v) Liens to secure the performance of statutory obligations,
surety or appeal bonds, performance bonds or other obligations of a like nature
incurred in the ordinary course of business; (vi) Liens existing on the date
hereof; (vii) Liens for taxes, assessments or governmental charges or claims
that are not yet delinquent or that are being contested in good faith by
appropriate proceedings promptly instituted and diligently concluded, provided
that any reserve or other appropriate provision as shall be 



                                      -11-
   19

required in conformity with GAAP shall have been made therefor; (viii) Liens
incurred in the ordinary course of business of the Company or any Restricted
Subsidiary of the Company with respect to obligations that do not exceed $5.0
million at any one time outstanding and that (a) are not incurred in connection
with the borrowing of money or the obtaining of advances or credit (other than
trade credit in the ordinary course of business) and (b) do not in the aggregate
materially detract from the value of the property or materially impair the use
thereof in the operation of business by the Company or such Restricted
Subsidiary and (ix) Liens to secure Indebtedness (including Capital Lease
Obligations) permitted by clause (iv) of Section 4.9 covering only the assets
acquired with such Indebtedness, together with any additions and accessions
thereto and replacements, substitutions and proceeds (including insurance
proceed(s) thereof); (x) carriers', warehousemen's, mechanics', landlords',
materialmen's, repairmen's, or other like Liens arising in the ordinary course
of business in respect of obligations not overdue for a period in excess of 30
days or which are being contested in good faith by appropriate proceedings
promptly instituted and diligently prosecuted; provided, that any reserve or
other appropriate provisions as shall be required to conform with GAAP shall
have been made therefor; (xi) easements, rights-of-way, zoning and similar
restrictions and other similar encumbrances or title defects incurred, or leases
or subleases granted to others, in the ordinary course of business, which do not
in any case materially detract from the value of the property subject thereto or
do not interfere with or adversely affect in any material respect the ordinary
conduct of the business of the Company and its Restricted Subsidiaries taken as
a whole; (xii) Liens (other than any Lien imposed by ERISA or any rule or
regulation promulgated thereunder) incurred or deposits made in the ordinary
course of business in connection with workers' compensation, unemployment
insurance, and other types of social security; (xiii) Liens in favor of a
trustee under any indenture securing amounts due to the trustee in connection
with its services under such indenture; (xiv) Liens under licensing agreements
for use of intellectual property entered into in the ordinary course of
business; and (xv) Liens on inventory or cash to secure cash advances made by
customers for the purchase price of inventory.

        "Permitted Refinancing Indebtedness" means any Indebtedness of the
Company or any of its Restricted Subsidiaries issued in exchange for, or the net
proceeds of which are used to extend, refinance, renew, replace, defease or
refund other Indebtedness of the Company or any of its Restricted Subsidiaries;
provided that: (i) except for Indebtedness used to extend, refinance, renew,
replace, defease or refund the New Credit Facility, the principal amount (or
accreted value, if applicable) of such Permitted Refinancing Indebtedness does
not exceed the principal amount of (or accreted value, if applicable), plus
accrued interest on, the Indebtedness so extended, refinanced, renewed,
replaced, defeased or refunded (plus the amount of reasonable expenses incurred
in connection therewith and the amount of any market-based premium paid in
connection herewith); (ii) such Permitted Refinancing Indebtedness has a final
maturity date later than the final maturity date of, and has a Weighted Average
Life to Maturity equal to or greater than the Weighted Average Life to Maturity
of, the Indebtedness being extended, refinanced, renewed, replaced, defeased or
refunded; (iii) if the Indebtedness being extended, refinanced, renewed,
replaced, defeased or refunded is subordinated in right of payment to the Notes,
such Permitted Refinancing Indebtedness has a final maturity date later than the
final maturity date of, and is subordinated in right of payment to, the Notes on
terms at least as favorable to the Holders of Notes as those contained in the




                                      -12-
   20

documentation governing the Indebtedness being extended, refinanced, renewed,
replaced, defeased or refunded; and (iv) such Indebtedness is incurred either by
the Company or by the Restricted Subsidiary who is the obligor on the
Indebtedness being extended, refinanced, renewed, replaced, defeased or
refunded.

        "Person" means any individual, corporation, partnership, joint venture,
association, joint stock company, trust, unincorporated organization, government
or any agency or political subdivision thereof or any other entity.

        "Principals" means DLJ Merchant Banking, Inc. and its Affiliates, the
Sprout Group and its Affiliates, John F. Schaefer and Arthur J. Cormier.

        "Private Placement Legend" means the legend initially set forth on the
Senior Notes in the form set forth in Section 2.6 (f) hereof.

        "Public Equity Offering" means a public offering of Equity Interests
(other than Disqualified Stock) of the Company; that results in the net proceeds
to the Company of at least $25.0 million.

        "QIB" means a "qualified institutional buyer" as defined in Rule 144A
under the Securities Act.

        "Registration Rights Agreement" means the Registration Rights Agreement,
dated as of the date hereof, by and among the Company, the Subsidiary Guarantors
and the Initial Purchaser.

        "Regulation S" means Regulation S promulgated under the Securities Act.

        "Regulation S Global Notes" means the Regulation S Temporary Global
Notes or the Regulation S Permanent Global Notes, as applicable.

        "Regulation S Permanent Global Notes" means the permanent global notes
that do not contain the paragraphs referred to in footnote 1 to the form of the
Note attached hereto as EXHIBIT A-2, and that are deposited with and registered
in the name of the Depositary or its nominee, representing a series of Notes
sold in reliance on Regulation S.

        "Regulation S Temporary Global Notes" means the temporary global notes
that contain the paragraphs referred to in footnote 1 to the form of the Note
attached hereto as EXHIBIT A-2, and that are deposited with and registered in
the name of the Depositary or its nominee, representing a series of Notes sold
in reliance on Regulation S.

        "Related Party" with respect to any Principal means (i) any controlling
stockholder or partner, 80% (or more) owned Subsidiary, or spouse or immediate
family member (in the case of an individual) of such Principal or (ii) any
trust, corporation, partnership, limited liability company or other entity, the
beneficiaries, stockholders, partners, members, owners or Persons beneficially




                                      -13-
   21

holding an 80% or more controlling interest of which consist of such Principal
and/or such other Persons referred to in the immediately preceding clause (i).

        "Responsible Officer" when used with respect to the Trustee, means any
officer in the Corporate Trust Office of the Trustee or any other officer of the
Trustee to whom a particular corporate trust matter is referred because of his
knowledge of and familiarity with the particular subject.

        "Restricted Definitive Note" means a Note in the form of the Note
attached hereto as EXHIBIT A-1 that includes the information called for in
footnote 2 thereof.

        "Restricted Global Notes" means the U.S. Global Notes and the Regulation
S Global Notes, all of which shall bear the Private Placement Legend.

        "Restricted Investment" means an Investment other than a Permitted
Investment.

        "Restricted Subsidiary" of a Person means any Subsidiary of the referent
Person that is not an Unrestricted Subsidiary.

        "Rule 144A" means Rule 144A promulgated under the Securities Act.

        "Securities Act" means the Securities Act of 1933, as amended.

        "Securityholders Agreement" means the Securityholders Agreement, dated
as of November 23, 1994, among the Company, John F. Schaefer, Arthur J. Cormier,
DLJ Merchant Banking Partners, L.P., DLJ International Partners, C.V., DLJ
Offshore Partners, C.V., DLJ Merchant Banking Funding, Inc., DLJ Capital
Corporation, Sprout Growth II, L.P. and Sprout Capital VI, L.P.

        "Senior Notes" means the Company's 10 -3/4 % Senior Notes due 2005.

        "Shelf Registration Statement" means the Shelf Registration Statement as
defined in the Registration Rights Agreement.

        "Significant Subsidiary" means any Subsidiary that would be a
"significant subsidiary" as defined in Article 1, Rule 1-02 of Regulation S-X,
promulgated pursuant to the Securities Act, as such Regulation is in effect on
the date hereof.

        "Stated Maturity" means, with respect to any installment of interest or
principal on any series of Indebtedness, the date on which such payment of
interest or principal was scheduled to be paid in the original documentation
governing such Indebtedness, and shall not include any contingent obligations to
repay, redeem or repurchase any such interest or principal prior to the date
originally scheduled for the payment thereof.



                                      -14-
   22

        "Subsidiary" means, with respect to any Person, (i) any corporation,
association or other business entity of which more than 50% of the total voting
power of shares of Capital Stock entitled (without regard to the occurrence of
any contingency) to vote in the election of directors, managers or trustees
thereof is at the time owned or controlled, directly or indirectly, by such
Person or one or more of the other Subsidiaries of that Person (or a combination
thereof) and (ii) any partnership (a) the sole general partner or the managing
general partner of which is such Person or a Subsidiary of such Person or (b)
the only general partners of which are such Person or of one or more
Subsidiaries of such Person (or any combination thereof).

        "Subsidiary Guarantors" means each of (i) Helios, Incorporated, Applied
Robotic Technologies, Inc., Air Bearings, Incorporated and Santa Barbara Metric,
Inc. and (ii) any other Subsidiary that executes a Note Guarantee substantially
in the form of EXHIBIT E attached hereto, and their respective successors and
assigns.

        "TIA" means the Trust Indenture Act of 1939 (15 U.S. Code Section
77aaa-77bbbb), as amended, as in effect on the date hereof.

        "Transfer Restricted Securities" means Senior Notes or beneficial
interests therein that bear or are required to bear the Private Placement
Legend.

        "Trustee" means State Street Bank and Trust Company of California, N.A.
until a successor replaces it in accordance with the applicable provisions of
this Indenture, and thereafter means the successor.

        "Unrestricted Global Notes" means one or more Global Notes that do not
and are not required to bear the Private Placement Legend.

        "Unrestricted Definitive Note" means a Note in the form of the Note
attached hereto as EXHIBIT A-1 that does not include the information called for
in footnotes 1, 2 and 3 thereof.

        "Unrestricted Subsidiary" means (i) any Subsidiary that is designated by
a resolution of the Board of Directors of the Company as an Unrestricted
Subsidiary; but only to the extent that such Subsidiary: (a) has no Indebtedness
other than Non-Recourse Debt; (b) is not party to any agreement, contract,
arrangement or understanding with the Company or any Restricted Subsidiary of
the Company unless the terms of any such agreement, contract, arrangement or
understanding are no less favorable to the Company or such Restricted Subsidiary
than those that might be obtained at the time from Persons who are not
Affiliates of the Company; (c) is a Person with respect to which neither the
Company nor any of its Restricted Subsidiaries has any direct or indirect
obligation (x) to subscribe for additional Equity Interests or (y) to maintain
or preserve such Person's financial condition or to cause such Person to achieve
any specified levels of operating results; (d) has not guaranteed or otherwise
directly or indirectly provided credit support for any Indebtedness of the
Company or any of its Restricted Subsidiaries; and (e) has at least one director
on its board of directors that is not a director or executive officer of the
Company or any of its Restricted Subsidiaries and has at least one 



                                      -15-
   23

executive officer that is not a director or executive officer of the Company or
any of its Restricted Subsidiaries. Any such designation by the Board of
Directors shall be evidenced to the Trustee by filing with the Trustee a
certified copy of the Board Resolution giving effect to such designation and an
Officers' Certificate certifying that such designation complied with the
foregoing conditions and was permitted by Section 4.7 hereof. If, at any time,
any Unrestricted Subsidiary would fail to meet the foregoing requirements as an
Unrestricted Subsidiary, it shall thereafter cease to be an Unrestricted
Subsidiary for purposes of this Indenture and any Indebtedness of such
Subsidiary shall be deemed to be incurred by a Restricted Subsidiary of the
Company as of such date (and, if such Indebtedness is not permitted to be
incurred as of such date under Section 4.9 hereof, the Company shall be in
default of such covenant). The Board of Directors of the Company may at any time
designate any Unrestricted Subsidiary to be a Restricted Subsidiary; provided
that such designation shall be deemed to be an incurrence of Indebtedness by a
Restricted Subsidiary of the Company of any outstanding Indebtedness of such
Unrestricted Subsidiary and such designation shall only be permitted if (i) such
Indebtedness is permitted under Section 4.9 hereof, and (ii) no Default or Event
of Default would be in existence following such designation.

        "U.S. Global Notes" means the permanent global notes that contain the
paragraphs referred to in footnotes 1 and 2 and the additional schedule referred
to in footnote 3 to the form of the Note attached hereto as EXHIBIT A-1, and
that is deposited with and registered in the name of the Depositary or its
nominee, representing a series of Notes sold in reliance on Rule 144A.

        "U.S. Person" means (i) any individual resident in the United States,
(ii) any partnership or corporation organized or incorporated under the laws of
the United States, (iii) any estate of which an executor or administrator is a
U.S. Person (other than an estate governed by foreign law and of which at least
one executor or administrator is a non-U.S. Person who has sole or shared
investment discretion with respect to its assets), (iv) any trust of which any
trustee is a U.S. Person (other than a trust of which at least one trustee is a
non-U.S. Person who has sole or shared investment discretion with respect to its
assets and no beneficiary of the trust (and no settler, if the trust is
revocable) is a U.S. Person), (v) any agency or branch of a foreign entity
located in the United States, (vi) any non-discretionary or similar account
(other than an estate or trust) held by a dealer or other fiduciary for the
benefit or account of a U.S. Person, (vii) any discretionary or similar account
(other than an estate or trust) held by a dealer or other fiduciary organized,
incorporated or (if an individual) resident in the United States (other than
such an account held for the benefit or account of a non-U.S. Person), (viii)
any partnership or corporation organized or incorporated under the laws of a
foreign jurisdiction and formed by a U.S. person principally for the purpose of
investing in securities not registered under the Securities Act (unless it is
organized or incorporated and owned, by "accredited investors" within the
meaning of Rule 501(a) under the Securities Act who are not natural persons,
estates or trusts); provided, however that the term "U.S. Person" shall not
include (A) a branch or agency of a U.S. Person that is located and operating
outside the United States for valid business purposes as a locally regulated
branch or agency engaged in the banking or insurance business, (B) any employee
benefit plan established and administered in accordance with the law, customary
practices and documentation of a foreign country and (C) the international
organizations set forth in 



                                      -16-
   24

Section 902(o)(7) of Regulation S under the Securities Act and any other similar
international organizations, and their agencies, affiliates and pension plans.

        "Voting Stock" of any Person as of any date means the Capital Stock of
such Person that is at the time entitled to vote in the election of the Board of
Directors of such Person.

        "Weighted Average Life to Maturity" means, when applied to any
Indebtedness at any date, the number of years obtained by dividing (i) the sum
of the products obtained by multiplying (a) the amount of each then remaining
installment, sinking fund, serial maturity or other required payments of
principal, including payment at final maturity, in respect thereof, by (b) the
number of years (calculated to the nearest one-twelfth) that will elapse between
such date and the making of such payment, by (ii) the then outstanding principal
amount of such Indebtedness.

        "Wholly-Owned Restricted Subsidiary" means a Subsidiary that is both a
Wholly-Owned Subsidiary and a Restricted Subsidiary.

        "Wholly-Owned Subsidiary" of any Person means a Subsidiary of such
Person all of the outstanding Capital Stock or other ownership interests of
which (other than directors' qualifying shares) shall at the time be owned by
such Person or by one or more Wholly-Owned Subsidiaries of such Person.

SECTION 1.2    OTHER DEFINITIONS.

Defined in Term Section


                                                                            
        "Affiliate Transaction"...............................................4.11
        "Asset Sale Offer"....................................................4.10
        "Change of Control Offer".............................................4.13
        "Change of Control Payment"...........................................4.13
        "Change of Control Payment Date"......................................4.13
        "Covenant Defeasance".................................................8.03
        "Custodian"...........................................................6.01
        "DTC".................................................................2.03
        "Event of Default"....................................................6.01
        "Excess Proceeds".....................................................4.10
        "Excess Proceeds Offer Triggering Event"..............................4.10
        "incur"...............................................................4.09
        "Legal Defeasance"....................................................8.02
        "Offer Amount"........................................................3.09
        "Offer Period"........................................................3.09
        "Paying Agent"........................................................2.03
        "Payment Default".....................................................6.01
        "Permitted Debt"......................................................4.09
        "Purchase Date".......................................................3.09



                                      -17-
   25


                                                                            
        "Registrar"...........................................................2.03
        "Repurchase Offer"....................................................3.09
        "Restricted Payments".................................................4.07


SECTION 1.3 INCORPORATION BY REFERENCE OF TRUST INDENTURE ACT.

        Whenever this Indenture refers to a provision of the TIA, the provision
is incorporated by reference in, and made a part of, this Indenture.

        The following TIA terms used in this Indenture have the following
meanings:

        "indenture securities" means the Notes;

        "indenture security holder" means a Holder of a Note;

        "indenture to be qualified" means this Indenture;

        "indenture trustee" or "institutional trustee" means the Trustee;

        "obligor" on the Notes means the Company, each Subsidiary Guarantor and
any successor obligor upon the Notes.

        All other terms used in this Indenture that are defined by the TIA,
defined by TIA reference to another statute or defined by the Commission rule
under the TIA have the meanings so assigned to them therein.

SECTION 1.4 RULES OF CONSTRUCTION.

        Unless the context otherwise requires:

        (1)     a term has the meaning assigned to it herein;

        (2)     an accounting term not otherwise defined herein has the meaning
                assigned to it in accordance with GAAP;

        (3)     "or" is not exclusive;

        (4)     words in the singular include the plural, and in the plural
                include the singular;

        (5)     provisions apply to successive events and transactions; and

        (6)     references to sections of or rules under the Securities Act
                shall be deemed to include substitute, replacement or successor
                sections or rules adopted by the Commission from time to time.



                                      -18-
   26

                                    ARTICLE 2

                                   THE NOTES

SECTION 2.1 FORM AND DATING.

        The Notes and the Trustee's certificate of authentication shall be
substantially in the form of EXHIBIT A-1 or EXHIBIT A-2 attached hereto. The
Notes may have notations, legends or endorsements required by law, stock
exchange rule or usage. Each Note shall be dated the date of its authentication.
The Notes initially shall be issued in denominations of $1,000 and integral
multiples thereof.

        The terms and provisions contained in the Notes shall constitute, and
are hereby expressly made, a part of this Indenture and the Company, the
Subsidiary Guarantors and the Trustee, by their execution and delivery of this
Indenture, expressly agree to such terms and provisions and to be bound thereby.

        (a)    Global Notes. Notes offered and sold to QIBs in reliance on Rule
144A shall be issued initially in the form of U.S. Global Notes, which shall be
deposited on behalf of the purchasers of the Notes represented thereby with the
Trustee, as custodian of the Depositary, and registered in the name of the
Depositary or a nominee of the Depositary, duly executed by the Company and
authenticated by the Trustee as hereinafter provided. The aggregate principal
amount of the U.S. Global Notes may from time to time be increased or decreased
by adjustments made on the records of the Trustee and the Depositary or its
nominee as hereinafter provided.

        Notes offered and sold in reliance on Regulation S shall be issued
initially in the form of the Regulation S Temporary Global Note, which shall be
deposited on behalf of the purchasers of the Notes represented thereby with the
Trustee, as custodian for the Depositary, and registered in the name of the
Depositary or the nominee of the Depositary for the accounts of designated
agents holding on behalf of Euroclear or Cedel, duly executed by the Company and
authenticated by the Trustee as hereinafter provided. The "40-day restricted
period" (as defined in Regulation S) shall be terminated upon the receipt by the
Trustee of (i) a written certificate from the Depositary, together with copies
of certificates from Euroclear and Cedel certifying that they have received
certification of non-United States beneficial ownership of 100% of the aggregate
principal amount of the Regulation S Temporary Global Notes (except to the
extent of any beneficial owners thereof who acquired an interest therein
pursuant to another exemption from registration under the Securities Act and who
will take delivery of a beneficial ownership interest in a U.S. Global Note, all
as contemplated by Section 2.6(a)(ii) hereof), and (ii) an Officers' Certificate
from the Company certifying as to the same matters covered in clause (i) above.
Following the termination of the 40-day restricted period, beneficial interests
in the Regulation S Temporary Global Note shall be exchanged for beneficial
interests in Regulation S Permanent Global Notes pursuant to the 




                                      -19-
   27

Applicable Procedures. Simultaneously with the authentication of Regulation S
Permanent Global Notes, the Trustee shall cancel the Regulation S Temporary
Global Note. The aggregate principal amount of the Regulation S Temporary Global
Notes and the Regulation S Permanent Global Notes may from time to time be
increased or decreased by adjustments made on the records of the Trustee and the
Depositary or its nominee, as the case may be, in connection with transfers of
interest as hereinafter provided.

        Each Global Note shall represent such of the outstanding Notes as shall
be specified therein and each shall provide that it shall represent the
aggregate amount of outstanding Notes from time to time endorsed thereon and
that the aggregate amount of outstanding Notes represented thereby may from time
to time be reduced or increased, as appropriate, to reflect exchanges,
redemptions and transfers of interests. Any endorsement of a Global Note to
reflect the amount of any increase or decrease in the amount of outstanding
Notes represented thereby shall be made by the Trustee or the Note Custodian, at
the direction of the Trustee, in accordance with instructions given by the
Holder thereof as required by Section 2.6 hereof.

        The provisions of the "Operating Procedures of the Euroclear System" and
"Terms and Conditions Governing Use of Euroclear" and the "General Terms and
Conditions of Cedel" and "Customer Handbook" of Cedel shall be applicable to
interests in the Regulation S Temporary Global Notes and the Regulation S
Permanent Global Notes that are held by Participants through Euroclear or Cedel.
The Trustee shall have no obligation to notify Holders of any such procedures or
to monitor or enforce compliance with the same.

        Except as set forth in Section 2.6 hereof, the Global Notes may be
transferred, in whole and not in part, only to another nominee of the Depositary
or to a successor of the Depositary or its nominee.

        (b)    Book-Entry Provisions. This Section 2.1(b) shall apply only to
Global Notes deposited with or on behalf of the Depositary.

        The Company shall execute and the Trustee shall, in accordance with this
Section 2.1(b), authenticate and deliver the Global Notes that (i) shall be
registered in the name of the Depositary or the nominee of the Depositary and
(ii) shall be delivered by the Trustee to the Depositary or pursuant to the
Depositary's instructions or held by the Trustee as custodian for the
Depositary.

        Participants shall have no rights either under this Indenture with
respect to any Global Note held on their behalf by the Depositary or by the Note
Custodian as custodian for the Depositary or under such Global Note, and the
Depositary may be treated by the Company, the Trustee and any agent of the
Company or the Trustee as the absolute owner of such Global Note for all
purposes whatsoever. Notwithstanding the foregoing, nothing herein shall prevent
the Company, the Trustee or any agent of the Company or the Trustee from giving
effect to any written certification, proxy or other authorization furnished by
the Depositary or impair, as between the Depositary and its 



                                      -20-
   28

Participants, the operation of customary practices of such Depositary governing
the exercise of the rights of an owner of a beneficial interest in any Global
Note.

SECTION 2.2 EXECUTION AND AUTHENTICATION.

        An Officer shall sign the Notes for the Company by manual or facsimile
signature.

        If an Officer whose signature is on a Note no longer holds that office
at the time a Note is authenticated, the Note shall nevertheless be valid.

        A Note shall not be valid until authenticated by the manual signature of
the Trustee. The signature shall be conclusive evidence that the Note has been
authenticated under this Indenture. The form of Trustee's certificate of
authentication to be borne by the Notes shall be substantially as set forth in
EXHIBIT A-1 or EXHIBIT A-2 attached hereto.

        The Trustee shall, upon a written order of the Company signed by an
Officer directing the Trustee to authenticate the Notes, authenticate Notes for
original issue up to the aggregate principal amount stated in paragraph 4 of the
Notes. The Trustee shall, upon written order of the Company signed by an
Officer, authenticate New Senior Notes for original issuance in exchange for a
like principal amount of Senior Notes exchanged in the Exchange Offer or
otherwise exchanged for New Senior Notes pursuant to the terms of the
Registration Rights Agreement. The aggregate principal amount of Notes
outstanding at any time may not exceed such amount except as provided in Section
2.7 hereof.

        The Trustee may (at the Company's expense) appoint an authenticating
agent acceptable to the Company to authenticate Notes. An authenticating agent
may authenticate Notes whenever the Trustee may do so. Each reference in this
Indenture to authentication by the Trustee includes authentication by such
agent. An authenticating agent has the same rights as an Agent to deal with the
Company or an Affiliate of the Company.

SECTION 2.3 REGISTRAR AND PAYING AGENT.

        The Company shall maintain (i) an office or agency where Notes may be
presented for registration of transfer or for exchange ("Registrar") and (ii) an
office or agency where Notes may be presented for payment ("Paying Agent"). The
Registrar shall keep a register of the Notes and of their transfer and exchange.
The Company may appoint one or more additional paying agents. The term "Paying
Agent" includes any additional paying agent. The Company may change any Paying
Agent or Registrar without notice to any Holder. The Company shall notify the
Trustee in writing of the name and address of any Agent not a party to this
Indenture. If the Company fails to appoint or maintain another entity as
Registrar or Paying Agent, the Trustee shall act as such. The Company or any of
its Subsidiaries may act as Paying Agent or Registrar.



                                      -21-
   29

        The Company initially appoints The Depository Trust Company ("DTC") to
act as Depositary with respect to the Global Notes.

        The Company initially appoints the Trustee to act as the Registrar and
Paying Agent and to act as Note Custodian with respect to the Global Notes. The
Company initially appoints the Trustee to act as the Registrar and Paying Agent
with respect to the Definitive Notes.

SECTION 2.4 PAYING AGENT TO HOLD MONEY IN TRUST.

        The Company shall require each Paying Agent other than the Trustee to
agree in writing that the Paying Agent shall hold in trust for the benefit of
Holders or the Trustee all money held by the Paying Agent for the payment of
principal, premium or Liquidated Damages, if any, or interest on the Notes, and
shall notify the Trustee of any default by the Company in making any such
payment. While any such default continues, the Trustee may require a Paying
Agent to pay all money held by it to the Trustee. The Company at any time may
require a Paying Agent to pay all money held by it to the Trustee. Upon payment
over to the Trustee, the Paying Agent (if other than the Company or a
Subsidiary) shall have no further liability for the money. If the Company or a
Subsidiary acts as Paying Agent, it shall segregate and hold in a separate trust
fund for the benefit of the Holders all money held by it as Paying Agent. Upon
the occurrence of events specified in Section 6.1(vii) through (ix) hereof, the
Trustee shall serve as Paying Agent for the Notes.

SECTION 2.5 HOLDER LISTS.

        The Trustee shall preserve in as current a form as is reasonably
practicable the most recent list available to it of the names and addresses of
all Holders and shall otherwise comply with TIA Section 312(a). If the Trustee
is not the Registrar, the Company and/or the Subsidiary Guarantors shall furnish
to the Trustee at least seven (7) Business Days before each interest payment
date and at such other times as the Trustee may request in writing, a list in
such form and as of such date as the Trustee may reasonably require of the names
and addresses of the Holders of Notes and the Company and the Subsidiary
Guarantors shall otherwise comply with TIA Section 312(a).

SECTION 2.6 TRANSFER AND EXCHANGE.

               (a) Transfer and Exchange of Global Notes. A Global Note may not
be transferred as a whole except by the Depositary to a nominee of the
Depositary, by a nominee of the Depositary to the Depositary or to another
nominee of the Depositary, or by the Depositary or any such nominee to a
successor Depositary or a nominee of such successor Depositary. All Global Notes
will be exchanged by the Company for Definitive Notes if (i) the Company
delivers to the Trustee notice from the Depositary that it is unwilling or
unable to continue to act as Depositary or that it is no longer a clearing
agency registered under the Exchange Act and, in either case, a successor
Depositary is not appointed by the Company within 120 days after the date of
such notice from the Depositary, (ii) the Company in its sole discretion
determines that the Global Notes (in whole but not in part) should be exchanged
for Definitive Notes and delivers a 




                                      -22-
   30

written notice to such effect to the Trustee, or (iii) there shall have occurred
and be continuing a Default or Event of Default with respect to the Notes;
provided that in no event shall the Regulation S Temporary Global Note be
exchanged by the Company for Definitive Notes prior to (x) the expiration of the
40-day restricted period and (y) the receipt by the Registrar of any
certificates identified by the Company or its counsel to be required pursuant to
Rule 903 under the Securities Act. Upon the occurrence of either of the
preceding events in (i), (ii) or (iii) above, Definitive Notes shall be issued
in such names as the Depositary shall instruct the Trustee. Global Notes also
may be exchanged or replaced, in whole or in part, as provided in Sections 2.7
and 2.10 hereof. Every Note authenticated and delivered in exchange for, or in
lieu of, a Global Note or any portion thereof, pursuant to Section 2.7 or 2.10
hereof, shall be authenticated and delivered in the form of, and shall be, a
Global Note. A Global Note may not be exchanged for another Note other than as
provided in this Section 2.6(a); however, beneficial interests in a Global Note
may be transferred and exchanged as provided in Section 2.6(b), (c) or (f)
hereof.

               (b) Transfer and Exchange of Beneficial Interests in Global
Notes. The transfer and exchange of beneficial interests in the Global Notes
shall be effected through the Depositary, in accordance with the provisions of
this Indenture and the Applicable Procedures. Beneficial interests in the
Restricted Global Notes shall be subject to restrictions on transfer described
in the Private Placement Legend to the extent required by the Securities Act.
Transfers of beneficial interests in the Global Notes also shall require
compliance with either subparagraph (i) or (ii) below, as applicable, as well as
one or more of the other following subparagraphs as applicable:

               (i) Transfer of Beneficial Interests in the Same Global Note.
        Beneficial interests in any Restricted Global Note may be transferred to
        Persons who take delivery thereof in the form of a beneficial interest
        in the same Restricted Global Note in accordance with the transfer
        restrictions set forth in the Private Placement Legend; provided,
        however, that prior to the expiration of the 40-day restricted period
        transfers of beneficial interests in the Temporary Regulation S Global
        Note may not be made to a U.S. Person or for the account or benefit of a
        U.S. Person (other than an Initial Purchaser). Beneficial interests in
        any Unrestricted Global Note may be transferred only to Persons who take
        delivery thereof in the form of a beneficial interest in an Unrestricted
        Global Note. No written orders or instructions shall be required to be
        delivered to the Registrar to effect the transfers described in this
        Section 2.6(b)(i).

               (ii) All Other Transfers and Exchanges of Beneficial Interests in
        Global Notes. In connection with all transfers and exchanges of
        beneficial interests (other than a transfer of a beneficial interest in
        a Global Note to a Person who takes delivery thereof in the form of a
        beneficial interest in the same Global Note), the transferor of such
        beneficial interest must deliver to the Registrar either (A) (1) a
        written order from a Participant to the Depositary in accordance with
        the Applicable Procedures directing the Depositary to credit or cause to
        be credited a beneficial interest in another Global Note in an amount
        equal to the beneficial interest to be transferred or exchanged and (2)
        instructions given in accordance with the Applicable Procedures
        containing information regarding the Participant 



                                      -23-
   31

        account to be credited with such increase or (B) (1) a written order
        from a Participant given to the Depositary in accordance with the
        Applicable Procedures directing the Depositary to cause to be issued a
        Definitive Note in an amount equal to the beneficial interest to be
        transferred or exchanged and (2) instructions given by the Depositary to
        the Registrar containing information regarding the Person in whose name
        such Definitive Note shall be registered to effect the transfer or
        exchange referred to in (1) above; provided that in no event shall
        Definitive Notes be issued upon the transfer or exchange of beneficial
        interests in the Regulation S Temporary Global Note prior to (x) the
        expiration of the 40-day restricted period and (y) the receipt by the
        Registrar of any certificates identified by the Company or its counsel
        to be required pursuant to Rule 903 under the Securities Act. Upon an
        Exchange Offer by the Company in accordance with Section 2.6(f) hereof,
        the requirements of this Section 2.6(b)(ii) shall be deemed to have been
        satisfied by compliance with the Applicable Procedures or upon receipt
        by the Registrar of the instructions contained in the Letter of
        Transmittal delivered by the Holder of such beneficial interests in the
        Restricted Global Notes. Upon satisfaction of all of the requirements
        for transfer or exchange of beneficial interests in Global Notes
        contained in this Indenture, the Notes and otherwise applicable under
        the Securities Act, the Trustee shall adjust the principal amount of the
        relevant Global Note(s) pursuant to Section 2.6(h) hereof.

               (iii) Transfer of Beneficial Interests to Another Restricted
        Global Note. A beneficial interest in any Restricted Global Note may be
        transferred to a Person who takes delivery thereof in the form of a
        beneficial interest in another Restricted Global Note if the transfer
        complies with the requirements of clause (ii) above and the Registrar
        receives the following:

                      (A) if the transferee will take delivery in the form of a
               beneficial interest in the U.S. Global Note, then the transferor
               must deliver a certificate in the form of EXHIBIT B hereto,
               including the certifications in item (1) thereof; and

                      (B) if the transferee will take delivery in the form of a
               beneficial interest in the Regulation S Temporary Global Note or
               the Regulation S Permanent Global Note, then the transferor must
               deliver a certificate in the form of EXHIBIT B hereto, including
               the certifications in item (2) thereof.

               (iv) Transfer and Exchange of Beneficial Interests in a
        Restricted Global Note for Beneficial Interests in an Unrestricted
        Global Note. A beneficial interest in any Restricted Global Note may be
        exchanged by any holder thereof for a beneficial interest in an
        Unrestricted Global Note or transferred to a Person who takes delivery
        thereof in the form of a beneficial interest in an Unrestricted Global
        Note if the exchange or transfer complies with the requirements of
        clause (ii) above and:

                      (A) such exchange or transfer is effected pursuant to the
               Exchange Offer in accordance with the Registration Rights
               Agreement and the holder of the 



                                      -24-
   32

                beneficial interest to be transferred, in the case of an
                exchange, or the transferee, in the case of a transfer, is not
                (1) a Broker-Dealer, (2) a Person participating in the
                distribution of the Notes issued in the Exchange Offer or (3) a
                Person who is an affiliate (as defined in Rule 144) of the
                Company;

                      (B) any such transfer is effected pursuant to the Shelf
               Registration Statement in accordance with the Registration Rights
               Agreement;

                      (C) any such transfer is effected by a Broker-Dealer
               pursuant to the Exchange Offer Registration Statement in
               accordance with the Registration Rights Agreement; or

                      (D) the Registrar receives the following:

                             (1) if the holder of such beneficial interest in a
               Restricted Global Note proposes to exchange such beneficial
               interest for a beneficial interest in an Unrestricted Global
               Note, a certificate from such holder in the form of EXHIBIT C
               hereto, including the certifications in item (1)(a) thereof;

                             (2) if the holder of such beneficial interest in a
               Restricted Global Note proposes to transfer such beneficial
               interest to a Person who shall take delivery thereof in the form
               of a beneficial interest in an Unrestricted Global Note, a
               certificate from such holder in the form of EXHIBIT B hereto,
               including the certifications in item (4) thereof; and

                             (3) in each such case set forth in this
               subparagraph (D), an Opinion of Counsel in form reasonably
               acceptable to the Company to the effect that such exchange or
               transfer is in compliance with the Securities Act and that the
               restrictions on transfer contained herein and in the Private
               Placement Legend are not required in order to maintain compliance
               with the Securities Act.

                      If any such transfer is effected pursuant to subparagraph
        (B) or (D) above at a time when an Unrestricted Global Note has not yet
        been issued, the Company shall issue and, upon receipt of an
        authentication order in accordance with Section 2.2 hereof, the Trustee
        shall authenticate one or more Unrestricted Global Notes in an aggregate
        principal amount equal to the principal amount of beneficial interests
        transferred pursuant to subparagraph (B) or (D) above.

                      Beneficial interests in an Unrestricted Global Note cannot
        be exchanged for, or transferred to, Persons who take delivery thereof
        in the form of a beneficial interest in a Restricted Global Note.

               (c) Transfer or Exchange of Beneficial Interests in Global Notes
for Definitive Notes.



                                      -25-
   33

               (i) If any holder of a beneficial interest in a Restricted Global
        Note proposes to exchange such beneficial interest for a Restricted
        Definitive Note or to transfer such beneficial interest to a Person who
        takes delivery thereof in the form of a Restricted Definitive Note,
        then, upon receipt by the Registrar of the following documentation:

                      (A) if the holder of such beneficial interest proposes to
               exchange such beneficial interest for a Restricted Definitive
               Note, a certificate from such holder in the form of EXHIBIT C
               hereto, including the certifications in item (2)(a) thereof;

                      (B) if such beneficial interest is being transferred to a
               QIB in accordance with Rule 144A under the Securities Act, a
               certificate to the effect set forth in EXHIBIT B hereto,
               including the certifications in item (1) thereof;

                      (C) if such beneficial interest is being transferred to a
               non-U.S. Person in an offshore transaction in accordance with
               Rule 903 or Rule 904 under the Securities Act, a certificate to
               the effect set forth in EXHIBIT B hereto, including the
               certifications in item (2) thereof;

                      (D) if such beneficial interest is being transferred
               pursuant to an exemption from the registration requirements of
               the Securities Act in accordance with Rule 144 under the
               Securities Act, a certificate to the effect set forth in EXHIBIT
               B hereto, including the certifications in item (3)(a) thereof;

                      (E) if such beneficial interest is being transferred to an
               Institutional Accredited Investor in reliance on an exemption
               from the registration requirements of the Securities Act other
               than those listed in subparagraphs (B) through (D) above, a
               certificate to the effect set forth in EXHIBIT B hereto,
               including the certifications, certificates and Opinion of Counsel
               required by item (3)(d) thereof, if applicable;

                      (F) if such beneficial interest is being transferred to
               the Company or any of its Subsidiaries, a certificate to the
               effect set forth in EXHIBIT B hereto, including the
               certifications in item (3)(b) thereof; or

                      (G) if such beneficial interest is being transferred
               pursuant to an effective registration statement under the
               Securities Act, a certificate to the effect set forth in EXHIBIT
               B hereto, including the certifications in item (3)(c) thereof,

        the Trustee shall cause the aggregate principal amount of the applicable
        Restricted Global Note to be reduced accordingly pursuant to Section
        2.6(h) hereof, and the Company shall execute and the Trustee shall
        authenticate and deliver to the Person designated in the instructions a
        Restricted Definitive Note in the appropriate principal amount. Any
        Restricted Definitive Note issued in exchange for a beneficial interest
        in a Restricted Global 



                                      -26-
   34

        Note pursuant to this Section 2.6(c) shall be registered in such name or
        names and in such authorized denomination or denominations as the holder
        of such beneficial interest shall instruct the Registrar through
        instructions from the Depositary and the Participant. The Trustee shall
        deliver such Restricted Definitive Notes to the Persons in whose names
        such Notes are so registered. Any Restricted Definitive Note issued in
        exchange for a beneficial interest in a Restricted Global Note pursuant
        to this Section 2.6(c)(i) shall bear the Private Placement Legend and
        shall be subject to all restrictions on transfer contained therein.

               (ii) Notwithstanding Sections 2.6(c)(i)(A) and (C) hereof, a
        beneficial interest in the Regulation S Temporary Global Note may not be
        (A) exchanged for a Definitive Note prior to (x) the expiration of the
        40-day restricted period and (y) the receipt by the Registrar of any
        certificates required pursuant to Rule 903(c)(3)(B) under the Securities
        Act or (B) transferred to a Person who takes delivery thereof in the
        form of a Definitive Note prior to the conditions set forth in clause
        (A) above or unless the transfer is pursuant to an exemption from the
        registration requirements of the Securities Act other than Rule 903 or
        Rule 904.

               (iii) Notwithstanding 2.6(c)(i) hereof, a holder of a beneficial
        interest in a Restricted Global Note may exchange such beneficial
        interest for an Unrestricted Definitive Note or may transfer such
        beneficial interest to a Person who takes delivery thereof in the form
        of an Unrestricted Definitive Note if:

                      (A) such exchange or transfer is effected pursuant to the
               Exchange Offer in accordance with the Registration Rights
               Agreement and the holder of such beneficial interest, in the case
               of an exchange, or the transferee, in the case of a transfer, is
               not (1) a Broker-Dealer, (2) a Person participating in the
               distribution of the Notes issued in the Exchange Offer or (3) a
               Person who is an affiliate (as defined in Rule 144) of the
               Company;

                      (B) any such transfer is effected pursuant to the Shelf
               Registration Statement in accordance with the Registration Rights
               Agreement;

                      (C) any such transfer is effected by a Broker-Dealer
               pursuant to the Exchange Offer Registration Statement in
               accordance with the Registration Rights Agreement; or

                      (D) the Registrar receives the following:

                             (1) if the holder of such beneficial interest in a
               Restricted Global Note proposes to exchange such beneficial
               interest for an Unrestricted Definitive Note, a certificate from
               such holder in the form of EXHIBIT C hereto, including the
               certifications in item (1)(b) thereof;



                                      -27-
   35

                             (2) if the holder of such beneficial interest in a
               Restricted Global Note proposes to transfer such beneficial
               interest to a Person who shall take delivery thereof in the form
               of an Unrestricted Definitive Note, a certificate from such
               holder in the form of EXHIBIT B hereto, including the
               certifications in item (4) thereof; and

                             (3) in each such case set forth in this
               subparagraph (D), an Opinion of Counsel in form reasonably
               acceptable to the Company, to the effect that such exchange or
               transfer is in compliance with the Securities Act and that the
               restrictions on transfer contained herein and in the Private
               Placement Legend are not required in order to maintain compliance
               with the Securities Act.

               (iv) If any holder of a beneficial interest in an Unrestricted
        Global Note proposes to exchange such beneficial interest for an
        Unrestricted Definitive Note or to transfer such beneficial interest to
        a Person who takes delivery thereof in the form of an Unrestricted
        Definitive Note, then, upon satisfaction of the conditions set forth in
        Section 2.6(b)(ii) hereof, the Trustee shall cause the aggregate
        principal amount of the applicable Unrestricted Global Note to be
        reduced accordingly pursuant to Section 2.6(h) hereof, and the Company
        shall execute and the Trustee shall authenticate and deliver to the
        Person designated in the instructions an Unrestricted Definitive Note in
        the appropriate principal amount. Any Unrestricted Definitive Note
        issued in exchange for a beneficial interest pursuant to this Section
        2.6(c)(iv) shall be registered in such name or names and in such
        authorized denomination or denominations as the holder of such
        beneficial interest shall instruct the Registrar through instructions
        from the Depositary and the Participant. The Trustee shall deliver such
        Unrestricted Definitive Notes to the Persons in whose names such Notes
        are so registered. Any Unrestricted Definitive Note issued in exchange
        for a beneficial interest pursuant to this section 2.6(c)(iv) shall not
        bear the Private Placement Legend. A beneficial interest in an
        Unrestricted Global Note cannot be exchanged for a Restricted Definitive
        Note or transferred to a Person who takes delivery thereof in the form
        of a Restricted Definitive Note.

        (d)     Transfer and Exchange of Definitive Notes for Beneficial
                Interests in Global Note.

               (i) If any Holder of a Restricted Definitive Note proposes to
        exchange such Note for a beneficial interest in a Restricted Global Note
        or to transfer such Restricted Definitive Notes to a Person who takes
        delivery thereof in the form of a beneficial interest in a Restricted
        Global Note, then, upon receipt by the Registrar of the following
        documentation:

                      (A) if the Holder of such Restricted Definitive Note
               proposes to exchange such Note for a beneficial interest in a
               Restricted Global Note, a certificate from such Holder in the
               form of EXHIBIT C hereto, including the certifications in item
               (2)(b) thereof;



                                      -28-
   36

                      (B) if such Restricted Definitive Note is being
               transferred to a QIB in accordance with Rule 144A under the
               Securities Act, a certificate to the effect set forth in EXHIBIT
               B hereto, including the certifications in item (1) thereof; or

                      (C) if such Restricted Definitive Note is being
               transferred to a non-U.S. Person in an offshore transaction in
               accordance with Rule 903 or Rule 904 under the Securities Act, a
               certificate to the effect set forth in EXHIBIT B hereto,
               including the certifications in item (2) thereof;

        the Trustee shall cancel the Restricted Definitive Note, increase or
        cause to be increased the aggregate principal amount of, in the case of
        clause (A) above, the appropriate Restricted Global Note, in the case of
        clause (B) above, the 144A Global Note, and in the case of clause (C)
        above, the Regulation S Global Note.

               (ii) A Holder of a Restricted Definitive Note may exchange such
        Note for a beneficial interest in an Unrestricted Global Note or
        transfer such Restricted Definitive Note to a Person who takes delivery
        thereof in the form of a beneficial interest in an Unrestricted Global
        Note if:

                      (A) such exchange or transfer is effected pursuant to the
               Exchange Offer in accordance with the Registration Rights
               Agreement and the Holder, in the case of an exchange, or the
               transferee, in the case of a transfer, is not (1) a
               Broker-Dealer, (2) a Person participating in the distribution of
               the Notes issued in the Exchange Offer or (3) a Person who is an
               affiliate (as defined in Rule 144) of the Company;

                      (B) any such transfer is effected pursuant to the Shelf
               Registration Statement in accordance with the Registration Rights
               Agreement;

                      (C) any such transfer is effected by a Broker-Dealer
               pursuant to the Exchange Offer Registration Statement in
               accordance with the Registration Rights Agreement; or

                      (D) the Registrar receives the following:

                             (1) if the Holder of such Restricted Definitive
               Notes proposes to exchange such Notes for a beneficial interest
               in the Unrestricted Global Note, a certificate from such Holder
               in the form of EXHIBIT C hereto, including the certifications in
               item (1)(c) thereof;

                             (2) if the Holder of such Restricted Definitive
               Notes proposes to transfer such Notes to a Person who shall take
               delivery thereof in the form of a 



                                      -29-
   37

               beneficial interest in the Unrestricted Global Note, a
               certificate from such Holder in the form of EXHIBIT B hereto,
               including the certifications in item (4) thereof; and

                             (3) in each such case set forth in this
               subparagraph (D), an Opinion of Counsel in form reasonably
               acceptable to the Company to the effect that such exchange or
               transfer is in compliance with the Securities Act, that the
               restrictions on transfer contained herein and in the Private
               Placement Legend are not required in order to maintain compliance
               with the Securities Act, and such Restricted Definitive Notes are
               being exchanged or transferred in compliance with any applicable
               blue sky securities laws of any State of the United States.

        Upon satisfaction of the conditions of any of the subparagraphs in this
        Section 2.6(d)(ii), the Trustee shall cancel the Restricted Definitive
        Notes and increase or cause to be increased the aggregate principal
        amount of the Unrestricted Global Note.

               (iii) A Holder of an Unrestricted Definitive Note may exchange
        such Note for a beneficial interest in an Unrestricted Global Note or
        transfer such Unrestricted Definitive Notes to a Person who takes
        delivery thereof in the form of a beneficial interest in an Unrestricted
        Global Note at any time. Upon receipt of a request for such an exchange
        or transfer, the Trustee shall cancel the applicable Unrestricted
        Definitive Note and increase or cause to be increased the aggregate
        principal amount of the Unrestricted Global Note.

               If any such exchange or transfer from a Definitive Note to a
beneficial interest is effected pursuant to subparagraphs (ii)(B), (ii)(D) or
(iii) above at a time when an Unrestricted Global Note has not yet been issued,
the Company shall issue and, upon receipt of an authentication order in
accordance with Section 2.2 hereof, the Trustee shall authenticate one or more
Unrestricted Global Notes in an aggregate principal amount equal to the
principal amount of beneficial interests transferred pursuant to subparagraphs
(ii)(B), (ii)(D) or (iii) above.

               (e) Transfer and Exchange of Definitive Notes for Definitive
Notes. Upon request by a Holder of Definitive Notes and such Holder's compliance
with the provisions of this Section 2.6(e), the Registrar shall register the
transfer or exchange of Definitive Notes. Prior to such registration of transfer
or exchange, the requesting Holder shall present or surrender to the Registrar
the Definitive Notes duly endorsed or accompanied by a written instruction of
transfer in form satisfactory to the Registrar duly executed by such Holder or
by his attorney, duly authorized in writing. In addition, the requesting Holder
shall provide any additional certifications, documents and information, as
applicable, pursuant to the provisions of this Section 2.6(e).

               (i) Restricted Definitive Notes may be transferred to and
        registered in the name of Persons who take delivery thereof if the
        Registrar receives the following:

                      (A) if the transfer will be made pursuant to Rule 144A
               under the Securities Act, then the transferor must deliver a
               certificate in the form of EXHIBIT B hereto, including the
               certifications in item (1) thereof;



                                      -30-
   38

                      (B) if the transfer will be made pursuant to Rule 903 or
               Rule 904, then the transferor must deliver a certificate in the
               form of EXHIBIT B hereto, including the certifications in item
               (2) thereof; and

                      (C) if the transfer will be made pursuant to any other
               exemption from the registration requirements of the Securities
               Act, then the transferor must deliver a certificate in the form
               of EXHIBIT B hereto, including the certifications, certificates
               and Opinion of Counsel required by item (3) thereof, if
               applicable.

               (ii) Any Restricted Definitive Note may be exchanged by the
        Holder thereof for an Unrestricted Definitive Note or transferred to a
        Person or Persons who take delivery thereof in the form of an
        Unrestricted Definitive Note if:

                      (A) such exchange or transfer is effected pursuant to the
               Exchange Offer in accordance with the Registration Rights
               Agreement and the Holder, in the case of an exchange, or the
               transferee, in the case of a transfer, is not (1) a
               Broker-Dealer, (2) a Person participating in the distribution of
               the Notes issued in the Exchange Offer or (3) a Person who is an
               affiliate (as defined in Rule 144) of the Company;

                      (B) any such transfer is effected pursuant to the Shelf
               Registration Statement in accordance with the Registration Rights
               Agreement;

                      (C) any such transfer is effected by a Broker-Dealer
               pursuant to the Exchange Offer Registration Statement in
               accordance with the Registration Rights Agreement; or

                      (D) the Registrar receives the following:

                             (1) if the Holder of such Restricted Definitive
               Notes proposes to exchange such Notes for an Unrestricted
               Definitive Note, a certificate from such Holder in the form of
               EXHIBIT C hereto, including the certifications in item (1)(d)
               thereof;

                             (2) if the Holder of such Restricted Definitive
               Notes proposes to transfer such Notes to a Person who shall take
               delivery thereof in the form of an Unrestricted Definitive Note,
               a certificate from such Holder in the form of EXHIBIT B hereto,
               including the certifications in item (4) thereof; and

                             (3) in each such case set forth in this
               subparagraph (D), an Opinion of Counsel in form reasonably
               acceptable to the Company to the effect that such exchange or
               transfer is in compliance with the Securities Act, that the
               restrictions on transfer contained herein and in the Private
               Placement Legend are not required in order to maintain compliance
               with the Securities Act, and such 



                                      -31-
   39

               Restricted Definitive Note is being exchanged or transferred in
               compliance with any applicable blue sky securities laws of any
               State of the United States.

               (iii) A Holder of Unrestricted Definitive Notes may transfer such
        Notes to a Person who takes delivery thereof in the form of an
        Unrestricted Definitive Note. Upon receipt of a request for such a
        transfer, the Registrar shall register the Unrestricted Definitive Notes
        pursuant to the instructions from the Holder thereof. Unrestricted
        Definitive Notes cannot be exchanged for or transferred to Persons who
        take delivery thereof in the form of a Restricted Definitive Note.

               (f) Exchange Offer. Upon the occurrence of the Exchange Offer in
accordance with the Registration Rights Agreement, the Company shall issue and,
upon receipt of an authentication order in accordance with Section 2.2, the
Trustee shall authenticate (i) one or more Unrestricted Global Notes in an
aggregate principal amount equal to the principal amount of the beneficial
interests in the Restricted Global Notes tendered for acceptance by persons that
are not (x) Broker-Dealers, (y) Persons participating in the distribution of the
Notes issued in the Exchange Offer or (z) Persons who are Affiliates (as defined
in Rule 144) of the Company and accepted for exchange in the Exchange Offer and
(ii) Unrestricted Definitive Notes in an aggregate principal amount equal to the
principal amount of the Restricted Definitive Notes accepted for exchange in the
Exchange Offer. Concurrent with the issuance of such Notes, the Trustee shall
cause the aggregate principal amount of the applicable Restricted Global Notes
to be reduced accordingly, and the Company shall execute and the Trustee shall
authenticate and deliver to the Persons designated by the Holders of Definitive
Notes so accepted Unrestricted Definitive Notes in the appropriate principal
amount.

        (g)    Legends. The following legends shall appear on the face of all
Global Notes and Definitive Notes issued under this Indenture unless
specifically stated otherwise in the applicable provisions of this Indenture.

               (i)    Private Placement Legend.

                      (A) Except as permitted by subparagraph (B) below, each
               Global Note and each Definitive Note (and all Notes issued in
               exchange therefor or substitution thereof) shall bear the legend
               in substantially the following form:

               "THIS NOTE (OR ITS PREDECESSOR) HAS NOT BEEN REGISTERED UNDER THE
               U.S. SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"),
               AND, ACCORDINGLY, MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE
               TRANSFERRED WITHIN THE UNITED STATES OR TO, OR FOR THE ACCOUNT OR
               BENEFIT OF, U.S. PERSONS, EXCEPT AS SET FORTH IN THE SECOND
               SENTENCE HEREOF. BY ITS ACQUISITION HEREOF OR OF A BENEFICIAL
               INTEREST HEREIN, THE HOLDER (1) REPRESENTS THAT (A) IT IS A
               "QUALIFIED INSTITUTIONAL BUYER" (AS DEFINED IN RULE 



                                      -32-
   40

                144A UNDER THE SECURITIES ACT) (A "QIB"), (B) IT IS ACQUIRING
                THIS NOTE IN AN OFFSHORE TRANSACTION IN COMPLIANCE WITH
                REGULATION S UNDER THE SECURITIES ACT OR (C) IT IS AN
                INSTITUTIONAL "ACCREDITED INVESTOR" (AS DEFINED IN RULE 501(A)
                (1), (2), (3) OR (7) OF REGULATION D UNDER THE SECURITIES ACT
                (AN "IAI"), (2) AGREES THAT IT WILL NOT, RESELL OR OTHERWISE
                TRANSFER THIS NOTE EXCEPT (A) TO THE COMPANY OR ANY OF ITS
                SUBSIDIARIES, (B) TO A PERSON WHOM THE SELLER REASONABLY
                BELIEVES IS A QIB PURCHASING FOR ITS OWN ACCOUNT OR FOR THE
                ACCOUNT OF A QIB IN A TRANSACTION MEETING THE REQUIREMENTS OF
                RULE 144A, (C) IN AN OFFSHORE TRANSACTION MEETING THE
                REQUIREMENTS OF RULE 903 OR 904 OF THE SECURITIES ACT, (D) IN A
                TRANSACTION MEETING THE REQUIREMENTS OF RULE 144 UNDER THE
                SECURITIES ACT, (E) TO AN IAI THAT, PRIOR TO SUCH TRANSFER,
                FURNISHES THE TRUSTEE A SIGNED LETTER CONTAINING CERTAIN
                REPRESENTATIONS AND AGREEMENTS RELATING TO THE TRANSFER OF THIS
                NOTE (THE FORM OF WHICH CAN BE OBTAINED FROM THE TRUSTEE) AND,
                IF SUCH TRANSFER IS IN RESPECT OF AN AGGREGATE PRINCIPAL AMOUNT
                OF NOTES LESS THAN $250,000, AN OPINION OF COUNSEL ACCEPTABLE TO
                THE COMPANY THAT SUCH TRANSFER IS IN COMPLIANCE WITH THE
                SECURITIES ACT, (F) IN ACCORDANCE WITH ANOTHER EXEMPTION FROM
                THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT (AND BASED
                UPON AN OPINION OF COUNSEL ACCEPTABLE TO THE COMPANY) OR (G)
                PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT AND, IN EACH
                CASE, IN ACCORDANCE WITH THE APPLICABLE SECURITIES LAWS OF ANY
                STATE OF THE UNITED STATES OR ANY OTHER APPLICABLE JURISDICTION
                AND (3) AGREES THAT IT WILL DELIVER TO EACH PERSON TO WHOM THIS
                NOTE OR AN INTEREST HEREIN IS TRANSFERRED A NOTICE SUBSTANTIALLY
                TO THE EFFECT OF THIS LEGEND. AS USED HEREIN, THE TERMS
                "OFFSHORE TRANSACTION" AND "UNITED STATES" HAVE THE MEANINGS
                GIVEN TO THEM BY RULE 902 OF REGULATION S UNDER THE SECURITIES
                ACT. THE INDENTURE CONTAINS A PROVISION REQUIRING THE TRUSTEE TO
                REFUSE TO REGISTER ANY TRANSFER OF THIS NOTE IN VIOLATION OF THE
                FOREGOING."

                      (B) Notwithstanding the foregoing, any Unrestricted Global
               Note or Unrestricted Definitive Note issued pursuant to
               subparagraphs (b)(iv), (c)(iii), (c)(iv), (d)(ii), (d)(iii),
               (e)(ii), (e)(iii) or (f) to this Section 2.6 (and all Notes
               issued in exchange therefor or substitution thereof) shall not
               bear the Private Placement Legend.



                                      -33-
   41

               (ii) Global Note Legend. Each Global Note shall bear a legend in
        substantially the following form:

               "UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR NOTES
               IN DEFINITIVE FORM, THIS NOTE MAY NOT BE TRANSFERRED EXCEPT AS A
               WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A
               NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF
               THE DEPOSITARY OR BY THE DEPOSITARY OR ANY SUCH NOMINEE TO A
               SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR DEPOSITARY.
               UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED
               REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (55 WATER STREET,
               NEW YORK, NEW YORK) ("DTC"), TO THE ISSUER OR ITS AGENT FOR
               REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY
               CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR
               SUCH OTHER NAME AS MAY BE REQUESTED BY AN AUTHORIZED
               REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR
               SUCH OTHER ENTITY AS MAY BE REQUESTED BY AN AUTHORIZED
               REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF
               FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL IN AS MUCH
               AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST
               HEREIN."

               (iii) Regulation S Temporary Global Note Legend. The Regulation S
        Temporary Global Note shall bear a legend in substantially the following
        form:

               "THE RIGHTS ATTACHING TO THIS REGULATION S TEMPORARY GLOBAL NOTE,
               AND THE CONDITIONS AND PROCEDURES GOVERNING ITS EXCHANGE FOR
               CERTIFICATED NOTES, ARE AS SPECIFIED IN THE INDENTURE (AS DEFINED
               HEREIN). NEITHER THE HOLDER NOR THE BENEFICIAL OWNERS OF THIS
               REGULATION S TEMPORARY GLOBAL NOTE SHALL BE ENTITLED TO RECEIVE
               CASH PAYMENTS OF INTEREST DURING THE PERIOD WHICH SUCH HOLDER
               HOLDS THIS NOTE. NOTHING IN THIS LEGEND SHALL BE DEEMED TO
               PREVENT INTEREST FROM ACCRUING ON THIS NOTE."

        (h)    Cancellation and/or Adjustment of Global Notes. At such time as
all beneficial interests in a particular Global Note have been exchanged for
Definitive Notes or a particular Global Note has been redeemed, repurchased or
canceled in whole and not in part, each such Global Note shall be returned to or
retained and canceled by the Trustee in accordance with 



                                      -34-
   42

Section 2.11 hereof. At any time prior to such cancellation, if any beneficial
interest in a Global Note is exchanged for or transferred to a Person who will
take delivery thereof in the form of a beneficial interest in another Global
Note or for Definitive Notes, the principal amount of Notes represented by such
Global Note shall be reduced accordingly and an endorsement shall be made on
such Global Note, by the Trustee or by the Depositary at the direction of the
Trustee, to reflect such reduction; and if the beneficial interest is being
exchanged for or transferred to a Person who will take delivery thereof in the
form of a beneficial interest in another Global Note, such other Global Note
shall be increased accordingly and an endorsement shall be made on such Global
Note, by the Trustee or by the Depositary at the direction of the Trustee, to
reflect such increase.

        (i)    General Provisions Relating to Transfers and Exchanges.

               (i) To permit registrations of transfers and exchanges, the
        Company shall execute and the Trustee shall authenticate Global Notes
        and Definitive Notes upon receipt of a Company Order or at the
        Registrar's request.

               (ii) No service charge shall be made to a holder of a beneficial
        interest in a Global Note or to a Holder of a Definitive Note for any
        registration of transfer or exchange, but the Company may require
        payment of a sum sufficient to cover any transfer tax or similar
        governmental charge payable in connection therewith (other than any such
        transfer taxes or similar governmental charge payable upon exchange or
        transfer pursuant to Sections 2.10, 3.9, 4.10, 4.13 and 9.5 hereof).

               (iii) The Registrar shall not be required to register the
        transfer of or exchange any Note selected for redemption in whole or in
        part, except the unredeemed portion of any Note being redeemed in part.

               (iv) All Global Notes and Definitive Notes issued upon any
        registration of transfer or exchange of Global Notes or Definitive Notes
        shall be the valid obligations of the Company, evidencing the same debt,
        and entitled to the same benefits under this Indenture, as the Global
        Notes or Definitive Notes surrendered upon such registration of transfer
        or exchange.

               (v) The Company shall not be required (A) to issue, to register
        the transfer of or to exchange Notes during a period beginning at the
        opening of business 15 days before the day of any selection of Notes for
        redemption under Section 3.02 hereof and ending at the close of business
        on the day of selection, (B) to register the transfer of or to exchange
        any Note so selected for redemption in whole or in part, except the
        unredeemed portion of any Note being redeemed in part or (C) to register
        the transfer of or to exchange a Note between a record date and the next
        succeeding Interest Payment Date.

               (vi) Prior to due presentment for the registration of a transfer
        of any Note, the Trustee, any Agent and the Company may deem and treat
        the Person in whose name any 



                                      -35-
   43

        Note is registered as the absolute owner of such Note for the purpose of
        receiving payment of principal of and interest on such Notes and for all
        other purposes, and none of the Trustee, any Agent or the Company shall
        be affected by notice to the contrary.

               (vii) The Trustee shall authenticate Global Notes and Definitive
        Notes in accordance with the provisions of Section 2.2 hereof.

               (viii) All certifications, certificates and Opinions of Counsel
        required to be submitted to the Registrar pursuant to this Section 2.6
        to effect a transfer or exchange may be submitted by facsimile.

SECTION 2.7 REPLACEMENT NOTES.

        If any mutilated Note is surrendered to the Trustee, or the Company and
the Trustee receives evidence to their satisfaction of the destruction, loss or
theft of any Note, the Company shall issue and the Trustee, upon the written
order of the Company signed by an Officer of the Company, shall authenticate a
replacement Note if the Trustee's requirements are met. If required by the
Trustee or the Company, an indemnity bond must be supplied by the Holder that is
sufficient in the judgment of the Trustee and the Company to protect the
Company, the Trustee, any Agent and any authenticating agent from any loss that
any of them may suffer if a Note is replaced. The Company and the Trustee may
charge for their expenses in replacing a Note.

        Every replacement Note is an additional obligation of the Company and
shall be entitled to all of the benefits of this Indenture equally and
proportionately with all other Notes duly issued hereunder.

SECTION 2.8 OUTSTANDING NOTES.

        The Notes outstanding at any time are all the Notes authenticated by the
Trustee except for those canceled by it, those delivered to it for cancellation,
those reductions in the interest in a Global Note effected by the Trustee in
accordance with the provisions hereof, and those described in this Section 2.8
as not outstanding. Except as set forth in Section 2.9 hereof, a Note does not
cease to be outstanding because the Company or any Subsidiary Guarantor or an
Affiliate of the Company or any Subsidiary Guarantor holds the Note.

        If a Note is replaced pursuant to Section 2.7 hereof, it ceases to be
outstanding unless the Trustee receives proof satisfactory to it that the
replaced Note is held by a bona fide purchaser.

        If the principal amount of any Note is considered paid under Section 4.1
hereof, it ceases to be outstanding and interest on it ceases to accrue.

        If the Paying Agent (other than the Company, a Subsidiary or an
Affiliate of any thereof) holds, on a redemption date or maturity date, money
sufficient to pay Notes payable on that date, 



                                      -36-
   44

then on and after that date such Notes shall be deemed to be no longer
outstanding and shall cease to accrue interest.

SECTION 2.9 TREASURY NOTES.

        In determining whether the Holders of the required principal amount of
Notes have concurred in any direction, waiver or consent, Notes owned by the
Company or any Subsidiary Guarantor, or by any Affiliate of the Company or any
Subsidiary Guarantor shall be considered as though not outstanding, except that
for the purposes of determining whether the Trustee shall be protected in
relying on any such direction, waiver or consent, only Notes shown on the
Trustee's register as being so owned shall be so disregarded. Notwithstanding
the foregoing, Notes that are to be acquired by the Company or any Subsidiary
Guarantor or an Affiliate of the Company or any Subsidiary Guarantor pursuant to
an exchange offer, tender offer or other agreement shall not be deemed to be
owned by such entity until legal title to such Notes passes to such entity.

SECTION 2.10 TEMPORARY NOTES.

        Until Definitive Notes are ready for delivery, the Company may prepare
and the Trustee shall authenticate temporary Notes upon a written order of the
Company signed by an Officer of the Company. Temporary Notes shall be
substantially in the form of Definitive Notes but may have variations that the
Company considers appropriate for temporary Notes. Without unreasonable delay,
the Company shall prepare and the Trustee shall upon receipt of a written order
of the Company signed by an Officer authenticate Definitive Notes in exchange
for temporary Notes.

        Holders of temporary Notes shall be entitled to all of the benefits of
this Indenture.

SECTION 2.11 CANCELLATION.

        The Company at any time may deliver to the Trustee for cancellation any
Notes previously authenticated and delivered hereunder or which the Company may
have acquired in any manner whatsoever, and all Notes so delivered shall be
promptly canceled by the Trustee. All Notes surrendered for registration of
transfer, exchange or payment, if surrendered to any Person other than the
Trustee, shall be delivered to the Trustee. The Trustee and no one else shall
cancel all Notes surrendered for registration of transfer, exchange, payment,
replacement or cancellation. Subject to Section 2.7 hereof, the Company may not
issue new Notes to replace Notes that it has redeemed or paid or that have been
delivered to the Trustee for cancellation. All canceled Notes held by the
Trustee shall be destroyed and certification of their destruction delivered to
the Company, unless by a written order, signed by an Officer of the Company, the
Company shall direct that canceled Notes be returned to it.


                                      -37-
   45

SECTION 2.12 DEFAULTED INTEREST.

        If the Company or any Subsidiary Guarantor defaults in a payment of
interest on the Notes, it shall pay the defaulted interest in any lawful manner
plus, to the extent lawful, interest payable on the defaulted interest, to the
Persons who are Holders on a subsequent special record date, which date shall be
at the earliest practicable date but in all events at least five (5) Business
Days prior to the payment date, in each case at the rate provided in the Notes
and in Section 4.1 hereof. The Company shall fix or cause to be fixed each such
special record date and payment date, and shall promptly thereafter, notify the
Trustee of any such date. At least fifteen (15) days before the special record
date, the Company (or the Trustee, in the name and at the expense of the
Company) shall mail or cause to be mailed to Holders a notice that states the
special record date, the related payment date and the amount of such interest to
be paid.

SECTION 2.13  RECORD DATE.

        The record date for purposes of determining the identity of Holders of
the Notes entitled to vote or consent to any action by vote or consent
authorized or permitted under this Indenture shall be determined as provided for
in TIA Section 316 (c).

SECTION 2.14  COMPUTATION OF INTEREST.

        Interest on the Notes shall be computed on the basis of a 360-day year
comprised of twelve 30-day months.

SECTION 2.15  CUSIP NUMBER.

        The Company in issuing the Notes may use a "CUSIP" number, and if it
does so, the Trustee shall use the CUSIP number in notices of redemption or
exchange as a convenience to Holders; provided that any such notice may state
that no representation is made as to the correctness or accuracy of the CUSIP
number printed in the notice or on the Notes and that reliance may be placed
only on the other identification numbers printed on the Notes. The Company shall
promptly notify the Trustee of any change in the CUSIP number.


                                    ARTICLE 3

                            REDEMPTION AND PREPAYMENT

SECTION 3.1    NOTICES TO TRUSTEE.

        If the Company elects to redeem Notes pursuant to the optional
redemption provisions of Section 3.7 hereof, it shall furnish to the Trustee, at
least 45 days but not more than 60 days before a redemption date (unless a
shorter period is acceptable to the Trustee) an Officers' Certificate setting



                                      -38-
   46

forth (i) the Section of this Indenture pursuant to which the redemption shall
occur, (ii) the redemption date, (iii) the principal amount of Notes to be
redeemed and (iv) the redemption price.

        If the Company is required to make an offer to purchase Notes pursuant
to Section 4.10 or 4.13 hereof, it shall furnish to the Trustee, at least 45
days before the scheduled purchase date, an Officers' Certificate setting forth
(i) the section of this Indenture pursuant to which the offer to purchase shall
occur, (ii) the terms of the offer, (iii) the principal amount of Notes to be
purchased, (iv) the purchase price, (v) the purchase date and (vi) and further
setting forth a statement to the effect that (a) the Company or one of its
Subsidiaries has affected an Asset Sale and there are Excess Proceeds
aggregating more than $15.0 million or (b) a Change of Control has occurred, as
applicable.

SECTION 3.2    SELECTION OF NOTES TO BE REDEEMED OR PURCHASED.

        If less than all of the Notes are to be redeemed at any time, selection
of Notes for redemption will be made by the Trustee in compliance with the
requirements of the principal national securities exchange, if any, on which the
Notes are listed, or, if the Notes are not so listed, on a pro rata basis, by
lot or by such method as the Trustee shall deem fair and appropriate; provided
that no Notes of $1,000 or less shall be redeemed in part. Notices of redemption
shall be mailed by first class mail at least 30 but not more than 60 days before
the redemption date to each Holder of Notes to be redeemed at its registered
address. Notices of redemption may not be conditional. If any Note is to be
redeemed in part only, the notice of redemption that relates to such Note shall
state the portion of the principal amount thereof to be redeemed. A new Note in
principal amount equal to the unredeemed portion thereof will be issued in the
name of the Holder thereof upon cancellation of the original Note. Notes called
for redemption become due on the date fixed for redemption. On and after the
redemption date, interest ceases to accrue on Notes or portions of them called
for redemption.

SECTION 3.3    NOTICE OF REDEMPTION.

        At least 30 days but not more than 60 days before a redemption date, the
Company shall mail or cause to be mailed by first class mail, a notice of
redemption to each Holder whose Notes are to be redeemed.

        The notice shall identify the Notes to be redeemed and shall state:

        (1     the redemption date;

        (2     the redemption price for the Notes and accrued interest, and 
Liquidated Damages, if any;

        (3     if any Note is being redeemed in part, the portion of the
principal amount of such Notes to be redeemed and that, after the redemption
date, upon surrender of such Note, a new Note 



                                      -39-
   47

or Notes in principal amount equal to the unredeemed portion shall be issued
upon surrender of the original Note;

        (4     the name and address of the Paying Agent;

        (5     that Notes called for redemption must be surrendered to the 
Paying Agent to collect the redemption price;

        (6     that, unless the Company defaults in making such redemption
payment, interest and Liquidated Damages, if any, on Notes called for redemption
ceases to accrue on and after the redemption date;

        (7     the paragraph of the Notes and/or Section of this Indenture
pursuant to which the Notes called for redemption are being redeemed; and

        (8     that no representation is made as to the correctness or accuracy
of the CUSIP number, if any, listed in such notice or printed on the Notes.

        At the Company's request, the Trustee shall give the notice of
redemption in the Company's name and at the Company's expense; provided,
however, that the Company shall have delivered to the Trustee, at least 45 days
prior to the redemption date (or such shorter period as shall be acceptable to
the Trustee), an Officers' Certificate requesting that the Trustee give such
notice and setting forth the information to be stated in the notice as provided
in the preceding paragraph. The notice mailed in the manner herein provided
shall be conclusively presumed to have been duly given whether or not the Holder
receives such notice. In any case, failure to give such notice by mail or any
defect in the notice to the Holder of any Note shall not affect the validity of
the proceeding for the redemption of any other Note.

SECTION 3.4    EFFECT OF NOTICE OF REDEMPTION.

        Once notice of redemption is mailed in accordance with Section 3.3
hereof, Notes called for redemption become irrevocably due and payable on the
redemption date at the redemption price plus accrued and unpaid interest and
Liquidated Damages, if any, to such date. A notice of redemption may not be
conditional.

SECTION 3.5    DEPOSIT OF REDEMPTION OR PURCHASE PRICE.

        On or before 10:00 a.m. (New York City time) on each redemption date or
the date on which Notes must be accepted for purchase pursuant to Section 4.10
or 4.13, the Company shall deposit with the Trustee or with the Paying Agent
money sufficient to pay the redemption price of and accrued and unpaid interest
and Liquidated Damages, if any, on all Notes to be redeemed or purchased on that
date. The Trustee or the Paying Agent shall promptly return to the Company upon
its written request any money deposited with the Trustee or the Paying Agent by
the Company in 



                                      -40-
   48

excess of the amounts necessary to pay the redemption price of (including any
applicable premium), accrued interest and Liquidated Damages, if any, on all
Notes to be redeemed or purchased.

        If Notes called for redemption or tendered in an Asset Sale Offer or
Change of Control Offer are paid or if the Company has deposited with the
Trustee or Paying Agent money sufficient to pay the redemption or purchase price
of, unpaid and accrued interest and Liquidated Damages, if any, on all Notes to
be redeemed or purchased, on and after the redemption or purchase date interest
and Liquidated Damages, if any, shall cease to accrue on the Notes or the
portions of Notes called for redemption or tendered and not withdrawn in an
Asset Sale Offer or Change of Control Offer (regardless of whether certificates
for such securities are actually surrendered). If a Note is redeemed or
purchased on or after an interest record date but on or prior to the related
interest payment date, then any accrued and unpaid interest and Liquidated
Damages, if any, shall be paid to the Person in whose name such Note was
registered at the close of business on such record date. If any Note called for
redemption shall not be so paid upon surrender for redemption because of the
failure of the Company to comply with the preceding paragraph, interest shall be
paid on the unpaid principal and Liquidated Damages, if any, from the redemption
or purchase date until such principal and Liquidated Dames, if any, is paid, and
to the extent lawful on any interest not paid on such unpaid principal, in each
case, at the rate provided in the Notes and in Section 4.1 hereof.

SECTION 3.6    NOTES REDEEMED IN PART.

        Upon surrender of a Note that is redeemed in part, the Company shall
issue and, upon the Company's written request, the Trustee shall authenticate
for the Holder at the expense of the Company a new Note equal in principal
amount to the unredeemed portion of the Note surrendered.

SECTION 3.7    OPTIONAL REDEMPTION.

        (a     Except as set forth in the next paragraph, the Notes will not be
redeemable at the Company's option prior to February 1, 2002. Thereafter, the
Notes will be subject to redemption at any time at the option of the Company, in
whole or in part, upon not less than 30 nor more than 60 days' notice, at the
redemption prices (expressed as percentages of principal amount) set forth below
plus accrued and unpaid interest and Liquidated Damages thereon, if any, to the
applicable redemption date, if redeemed during the twelve-month period beginning
on February 1 of the years indicated below:



         YEAR                                    PERCENTAGE
                                                     
         2002                                      105.375%
         2003                                      102.688%
         2004 and thereafter                       100.000%


        (b     Notwithstanding the foregoing, at any time prior to February 1,
2001, the Company may redeem up to 33% of the original aggregate principal
amount of Notes at a redemption price of 110.75% of the principal amount
thereof, plus accrued and unpaid interest and Liquidated 



                                      -41-
   49

Damages thereon, if any, to the redemption date, with the net cash proceeds of a
Public Equity Offering; provided that at least 67% of the original aggregate
principal amount of Notes remains outstanding immediately after the occurrence
of such redemption; and provided, further, that such redemption shall occur
within 90 days of the date of the closing of such Public Equity Offering.

SECTION 3.8    MANDATORY REDEMPTION.

        Except as set forth under Sections 3.9, 4.10 and 4.13 hereof, the
Company shall not be required to make mandatory redemption or sinking fund
payments with respect to the Notes.

SECTION 3.9    REPURCHASE OFFERS.

        In the event that the Company shall be required to commence an offer to
all Holders to repurchase Notes (a "Repurchase Offer") pursuant to Section 4.10
hereof (an "Excess Proceeds Offer)" or pursuant to Section 4.13 hereof (a
"Change of Control Offer"), the Company shall follow the procedures specified
below.

        A Repurchase Offer shall commence no earlier than 30 days and no later
than 60 days after a Change of Control (unless the Company is not required to
make such offer pursuant to Section 4.13(c) hereof) or an Excess Proceeds Offer
Triggering Event (as defined below), as the case may be, and remain open for a
period of twenty (20) Business Days following its commencement and no longer,
except to the extent that a longer period is required by applicable law (the
"Offer Period"). No later than five (5) Business Days after the termination of
the Offer Period (the "Purchase Date"), the Company shall purchase the principal
amount of Notes required to be purchased pursuant to Section 4.10 hereof, in the
case of an Excess Proceeds Offer, or 4.13 hereof, in the case of a Change of
Control Offer (the "Offer Amount") or, if less than the Offer Amount has been
tendered, all Notes tendered in response to the Repurchase Offer. Payment for
any Notes so purchased shall be made in the same manner as interest payments are
made.

        If the Purchase Date is on or after an interest record date and on or
before the related interest payment date, any accrued and unpaid interest and
Liquidated Damages, if any, shall be paid to the Person in whose name a Note is
registered at the close of business on such record date, and no additional
interest or Liquidated Damages, if any, shall be payable to Holders who tender
Notes pursuant to the Repurchase Offer.

        Upon the commencement of a Repurchase Offer, the Company shall send, by
first class mail, a notice to the Trustee and each of the Holders, with a copy
to the Trustee. The notice shall contain all instructions and materials
necessary to enable such Holders to tender Notes pursuant to such Repurchase
Offer. The Repurchase Offer shall be made to all Holders. The notice, which
shall govern the terms of the Repurchase Offer, shall describe the transaction
or transactions that constitute the Change of Control or Excess Proceeds Offer
Triggering Event, as the case may be and shall state:



                                      -42-
   50

        (a     that the Repurchase Offer is being made pursuant to this Section
3.9 and Section 4.10 or 4.13 hereof, as the case may be, and the length of time
the Repurchase Offer shall remain open;

        (b     the Offer Amount, the purchase price and the Purchase Date;

        (c     that any Note not tendered or accepted for payment shall continue
to accrue interest;

        (d     that, unless the Company defaults in making such payment, any
Note accepted for payment pursuant to the Repurchase Offer shall cease to accrue
interest and Liquidated Damages, if any, after the Purchase Date;

        (e     that Holders electing to have a Note purchased pursuant to a
Repurchase Offer shall be required to surrender the Note, with the form entitled
"Option of Holder to Elect Purchase" on the reverse of the Note, duly completed,
or transfer by book-entry transfer, to the Company, the Depositary, or the
Paying Agent at the address specified in the notice not later than the close of
business on the last day of the Offer Period;

        (f     that Holders shall be entitled to withdraw their election if the
Company, the Depositary or the Paying Agent, as the case may be, receives, not
later than the expiration of the Offer Period, a telegram, telex, facsimile
transmission or letter setting forth the name of the Holder, the principal
amount of the Note the Holder delivered for purchase and a statement that such
Holder is withdrawing his election to have such Note purchased;

        (g     that, if the aggregate principal amount of Notes surrendered by
Holders exceeds the Offer Amount, the Company shall select the Notes to be
purchased on a pro rata basis (with such adjustments as may be deemed
appropriate by the Company so that only Notes in denominations of $1,000, or
integral multiples thereof, shall be purchased); and

        (h     that Holders whose Notes were purchased only in part shall be
issued new Notes equal in principal amount to the unpurchased portion of the
Notes surrendered (or transferred by book-entry transfer).

        On or before 10:00 a.m. (New York City time) on each Purchase Date, the
Company shall irrevocably deposit with the Trustee or Paying Agent in
immediately available funds the aggregate purchase price with respect to a
principal amount of Notes equal to the Offer Amount, together with accrued and
unpaid interest and Liquidated Damages, if any, thereon, to be held for payment
in accordance with the terms of this Section 3.9. On the Purchase Date, the
Company shall, to the extent lawful, (i) accept for payment, on a pro rata basis
to the extent necessary, the Offer Amount of Notes or portions thereof tendered
pursuant to the Repurchase Offer, or if less than the Offer Amount has been
tendered, all Notes tendered, (ii) deliver or cause the Paying Agent or
depository, as the case may be, to deliver to the Trustee Notes so accepted and
(iii) deliver to the Trustee an Officers' Certificate stating that such Notes or
portions thereof were accepted for payment by the Company in accordance with the
terms of this Section 3.9. The Company, the Depositary or the Paying Agent, as
the case may be, shall promptly (but in any case not later than three (3)
Business Days after the 


                                      -43-

   51

Purchase Date) mail or deliver to each tendering Holder an amount equal to the
purchase price of the Notes tendered by such Holder and accepted by the Company
for purchase, plus any accrued and unpaid interest and Liquidated Damages, if
any, thereon, and the Company shall promptly issue a new Note, and the Trustee,
shall authenticate and mail or deliver such new Note, to such Holder, equal in
principal amount to any unpurchased portion of such Holder's Notes surrendered.
Any Note not so accepted shall be promptly mailed or delivered by the Company to
the Holder thereof. The Company shall publicly announce in a newspaper of
general circulation or in a press release provided to a nationally recognized
financial wire service the results of the Repurchase Offer on the Purchase Date.

        Other than as specifically provided in this Section 3.9, any purchase
pursuant to this Section 3.9 shall be made pursuant to the provisions of
Sections 3.1, 3.2, 3.5 and 3.6 hereof.


                                    ARTICLE 4

                                    COVENANTS

SECTION 4.1  PAYMENT OF NOTES.

        The Company shall pay or cause to be paid the principal of, premium, if
any, and interest on the Notes on the dates and in the manner provided in the
Notes. The Company shall pay all Liquidated Damages, if any, in the same manner
on the dates and in the amounts set forth in the Registration Rights Agreement.
Principal, premium and Liquidated Damages, if any, and interest, shall be
considered paid for all purposes hereunder on the date the Paying Agent if other
than the Company or a Subsidiary thereof holds, as of 10:00 a.m. (New York City
time) money deposited by the Company in immediately available funds and
designated for and sufficient to pay all such principal, premium and Liquidated
Damages, if any, and interest, then due.

        The Company shall pay interest (including post-petition interest in any
proceeding under any Bankruptcy Law) on overdue principal at the rate equal to
1% per annum in excess of the then applicable interest rate on the Notes to the
extent lawful; it shall pay interest (including post-petition interest in any
proceeding under any Bankruptcy Law) on overdue installments of interest and
Liquidated Damages (without regard to any applicable grace period) at the same
rate to the extent lawful.

SECTION 4.2  MAINTENANCE OF OFFICE OR AGENCY.

        The Company shall maintain within the City of New York an office or
agency (which may be an office of the Trustee or an Affiliate of the Trustee or
Registrar) where Notes may be surrendered for registration of transfer or for
exchange and where notices and demands to or upon the Company in respect of the
Notes and this Indenture may be served. The Company shall give prompt written
notice to the Trustee of the location, and any change in the location, of such
office or agency. If at 



                                      -44-
   52

any time the Company shall fail to maintain any such required office or agency
or shall fail to furnish the Trustee with the address thereof, such
presentations, surrenders, notices and demands may be made or served at the
Corporate Trust Office of the Trustee.

        The Company may also from time to time designate one or more other
offices or agencies where the Notes may be presented or surrendered for any or
all such purposes and may from time to time rescind such designations; provided,
however, that no such designation or rescission shall in any manner relieve the
Company of its obligation to maintain an office or agency within the City and
State of New York for such purposes. The Company shall give prompt written
notice to the Trustee of any such designation or rescission and of any change in
the location of any such other office or agency.

        The Company hereby designates the Corporate Trust Office of the Trustee
as one such office or agency of the Company in accordance with Section 2.3
hereof.

SECTION 4.3    COMMISSION REPORTS.

        From and after the earlier of the effective date of the Exchange Offer
Registration Statement or the effective date of the Shelf Registration
Statement, whether or not required by the rules and regulations of the
Commission, so long as any Notes are outstanding, the Company shall furnish to
the Holders of Notes (i) all quarterly and annual financial information that
would be required to be contained in a filing with the Commission on Forms 10-Q
and 10-K if the Company were required to file such Forms, including a
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" and, with respect to the annual information only, a report thereon
by the Company's certified independent accountants and (ii) all current reports
that would be required to be filed with the Commission on Form 8-K if the
Company were required to file such reports. In addition, whether or not required
by the rules and regulations of the Commission, the Company shall file a copy of
all such information and reports with the Commission for public availability
(unless the Commission will not accept such a filing) within the time periods
that would have been applicable had the Company been subject to such rules and
regulations and make such information available to securities analysts and
prospective investors upon request. In addition, the Company has agreed that,
for so long as any Notes remain outstanding, it shall furnish to the Holders, to
securities analysts and prospective investors, upon their request, the
information required to be delivered pursuant to Rule 144A(d)(4) under the
Securities Act. The Company shall at all times comply with TIA Section 314(a).

        The financial information to be distributed to Holders of Notes shall be
filed with the Trustee and mailed to the Holders at their addresses appearing in
the register of Notes maintained by the Registrar, within 90 days after the end
of the Company's fiscal years and within 45 days after the end of each of the
first three quarters of each such fiscal year.



                                      -45-
   53

        The Company shall provide the Trustee with a sufficient number of copies
of all reports and other documents and information and, if requested by the
Company, the Trustee will deliver such reports to the Holders under this Section
4.3.

SECTION 4.4    COMPLIANCE CERTIFICATE.

        The Company shall deliver to the Trustee, within 90 days after the end
of each fiscal year, an Officers' Certificate stating that a review of the
activities of the Company and its Subsidiaries during the preceding fiscal year
has been made under the supervision of the signing Officers with a view to
determining whether each has kept, observed, performed and fulfilled its
obligations under this Indenture (including, with respect to any Restricted
Payments made during such year, the basis upon which the calculations required
by Section 4.7 hereof were computed, which calculations may be based on the
Company's latest available financial statements), and further stating, as to
each such Officer signing such certificate, that, to the best of his or her
knowledge, each entity has kept, observed, performed and fulfilled each and
every covenant contained in this Indenture and is not in default in the
performance or observance of any of the terms, provisions and conditions of this
Indenture (or, if a Default or Event of Default shall have occurred, describing
all such Defaults or Events of Default of which he or she may have knowledge and
what action the Company is taking or proposes to take with respect thereto) and
that, to the best of his or her knowledge, no event has occurred and remains in
existence by reason of which payments on account of the principal of, premium or
Liquidated Damages, if any, or interest on the Notes is prohibited or if such
event has occurred, a description of the event and what action the Company is
taking or proposes to take with respect thereto.

        So long as not contrary to the then current recommendations of the
American Institute of Certified Public Accountants, in connection with the
year-end financial statements delivered pursuant to Section 4.3 hereof, the
Company shall use its best efforts to deliver a written statement of the
Company's independent public accountants (who shall be a firm of established
national reputation) that in making the examination necessary for certification
of such financial statements, nothing has come to their attention that would
lead them to believe that the Company has violated any provisions of Article
Four or Section 5.1 hereof or, if any such violation has occurred, specifying
the nature and period of existence thereof, it being understood that such
accountants shall not be liable directly or indirectly to any Person for any
failure to obtain knowledge of any such violation. In the event that such
written statement of the Company's independent public accountants cannot be
obtained, the Company shall deliver an Officers' Certificate certifying that it
has used its best efforts to obtain such statements and was unable to do so.

        The Company shall, so long as any of the Notes are outstanding, deliver
to the Trustee, forthwith upon any Officer becoming aware of any Default or
Event of Default, an Officers' Certificate specifying such Default or Event of
Default and what action the Company is taking or proposes to take with respect
thereto.

SECTION 4.5    TAXES.



                                      -46-
   54

        The Company shall pay, and shall cause each of its Subsidiaries to pay,
prior to delinquency all material taxes, assessments and governmental levies,
except such as are contested in good faith and by appropriate proceedings and
with respect to which appropriate reserves have been taken in accordance with
GAAP.

SECTION 4.6    STAY, EXTENSION AND USURY LAWS.

        The Company and each Subsidiary Guarantor covenants (to the extent that
it may lawfully do so) that it shall not at any time insist upon, plead, or in
any manner whatsoever claim or take the benefit or advantage of, any stay,
extension or usury law wherever enacted, now or at any time hereafter in force,
that may affect the covenants or the performance of this Indenture; and the
Company and each Subsidiary Guarantor (to the extent that it may lawfully do so)
hereby expressly waives all benefit or advantage of any such law, and covenants
that it shall not, by resort to any such law, hinder, delay or impede the
execution of any power herein granted to the Trustee, but shall suffer and
permit the execution of every such power as though no such law has been enacted.

SECTION 4.7    RESTRICTED PAYMENTS.

        From and after the date hereof the Company shall not, and shall not
permit any of its Restricted Subsidiaries to, directly or indirectly: (i)
declare or pay any dividend or make any other payment or distribution on account
of the Company's or any of its Restricted Subsidiaries' Equity Interests
(including, without limitation, any payment in connection with any merger or
consolidation involving the Company) or to the direct or indirect holders of the
Company's or any of its Restricted Subsidiaries' Equity Interests in their
capacity as such (other than dividends or distributions payable in Equity
Interests (other than Disqualified Stock) of the Company); (ii) purchase, redeem
or otherwise acquire or retire for value (including without limitation, in
connection with any merger or consolidation involving the Company) any Equity
Interests of the Company or any direct or indirect parent of the Company; (iii)
make any payment on or with respect to, or purchase, redeem, defease or
otherwise acquire or retire for value any Indebtedness that is Pari Passu
Indebtedness or any Indebtedness which is subordinated to the Notes, except
scheduled payments of interest or principal at Stated Maturity of such
Indebtedness; or (iv) make any Restricted Investment (all such payments and
other actions set forth in clauses (i) through (iv) above being collectively
referred to as "Restricted Payments"), unless, at the time of and after giving
effect to such Restricted Payment:

        (a     no Default or Event of Default shall have occurred and be 
continuing or would occur as a consequence thereof;

        (b     the Company would, at the time of such Restricted Payment and
after giving pro forma effect thereto as if such Restricted Payment had been
made at the beginning of the applicable four-quarter period, have been permitted
to incur at least $1.00 of additional Indebtedness pursuant to the Fixed Charge
Coverage Ratio test set forth in the first paragraph of Section 4.9 hereof; and



                                      -47-
   55

        (c     such Restricted Payment, together with the aggregate amount of
all other Restricted Payments made by the Company and its Subsidiaries after the
date hereof (excluding Restricted Payments permitted by clause (ii) of the next
succeeding paragraph), is less than the sum of (i) 50% of the Consolidated Net
Income of the Company for the period (taken as one accounting period) from the
beginning of the first fiscal quarter commencing after the date hereof to the
end of the Company's most recently ended fiscal quarter for which internal
financial statements are available at the time of such Restricted Payment (or,
if such Consolidated Net Income for such period is a deficit, less 100% of such
deficit), plus (ii) 100% of the aggregate net cash proceeds received by the
Company from the issue or sale since the date hereof of Equity Interests of the
Company (other than Disqualified Stock) or of Disqualified Stock or debt
securities of the Company that have been converted into such Equity Interests
(other than Equity Interests (or Disqualified Stock or convertible debt
securities) sold to a Subsidiary of the Company and other than Disqualified
Stock or convertible debt securities that have been converted into Disqualified
Stock), plus (iii) to the extent that any Restricted Investment that was made
after the date hereof is sold for cash or otherwise liquidated or repaid for
cash, the lesser of (A) the cash return of capital with respect to such
Restricted Investment (less the cost of disposition, if any) and (B) the initial
amount of such Restricted Investment plus (iv) if any Unrestricted Subsidiary
(A) the assets of which are used or useful in, or which is engaged in, one or
more Permitted Businesses is redesignated as a Restricted Subsidiary, the fair
market value of such redesignated Subsidiary (as determined in good faith by the
Board of Directors) as of the date of its redesignation or (B) pays any cash
dividends or cash distributions to the Company or any of its Restricted
Subsidiaries, 50% of any such cash dividends or cash distributions made after
the date hereof.

        The foregoing provisions shall not prohibit (i) the payment of any
dividend within 60 days after the date of declaration thereof, if at said date
of declaration such payment would have complied with the provisions hereof; (ii)
the redemption, repurchase, retirement, defeasance or other acquisition of any
Indebtedness subordinated to the Notes or Equity Interests of the Company in
exchange for, or out of the net cash proceeds of the substantially concurrent
sale or issuance (other than to a Restricted Subsidiary of the Company) of,
other Equity Interests of the Company (other than any Disqualified Stock); (iii)
the defeasance, redemption, repurchase or other acquisition of Pari Passu
Indebtedness or Indebtedness subordinated to the Notes with the net cash
proceeds from an incurrence of Permitted Refinancing Indebtedness; (iv) the
payment of any dividend by a Restricted Subsidiary of the Company to the holders
of its Equity Interests on a pro rata basis; (v) optional and mandatory
prepayments on any revolving credit Indebtedness incurred under the New Credit
Facility; or (vi) any other Restricted Payment which, together with all other
Restricted Payments made pursuant to this clause (vi) after the date hereof,
does not exceed $5.0 million in the aggregate (in each case, after giving effect
to all subsequent reductions in the amount of any Restricted Investment made
pursuant to this clause (vi) either as a result of (A) the repayment of
disposition thereof for cash or (B) the redesignation of an Unrestricted
Subsidiary as a Restricted Subsidiary (valued proportionate to the Company's
equity interest in such Subsidiary at the time of such redesignation), but, in
the case of clauses (A) and (B), not to exceed the amount of such Restricted
Investment previously made pursuant to this clause (vi); provided that in the
case of each of clauses 



                                      -48-
   56

(i) through (vi) no Default or Event of Default shall have occurred and be
continuing after making such Restricted Payment.

        The Board of Directors may designate any Restricted Subsidiary to be an
Unrestricted Subsidiary if such designation would not cause a Default or Event
of Default; provided that in no event shall the business currently operated by
any Subsidiary Guarantor be transferred to or held by an Unrestricted
Subsidiary. For purposes of making such determination, all outstanding
Investments by the Company and its Restricted Subsidiaries (except to the extent
repaid in cash) in the Subsidiary so designated will be deemed to be Restricted
Payments at the time of such designation and will reduce the amount available
for Restricted Payments under the first paragraph of this Section 4.7. All such
outstanding Investments will be deemed to constitute Investments in an amount
equal to the fair market value of such Investments at the time of such
designation (as determined in good faith by the Board of Directors). Such
designation shall only be permitted if such Restricted Payment would be
permitted at such time and if such Restricted Subsidiary otherwise meets the
definition of an Unrestricted Subsidiary.

        The amount of all Restricted Payments (other than cash) shall be the
fair market value on the date of the Restricted Payment of the asset(s) or
securities proposed to be transferred or issued by the Company or such
Subsidiary, as the case may be, pursuant to the Restricted Payment. The fair
market value of any non-cash Restricted Payment shall be determined in good
faith by the Board of Directors whose resolution with respect thereto shall be
delivered to the Trustee such determination to be based upon an opinion or
appraisal issued by an accounting, appraisal or investment banking firm of
national standing if such fair market value exceeds $1.0 million. Not later than
the date of making any Restricted Payment, the Company shall deliver to the
Trustee an Officers' Certificate stating that such Restricted Payment is
permitted and setting forth the basis upon which the calculations required by
this Section 4.7 were computed, together with a copy of any fairness opinion or
appraisal required herein.

SECTION 4.8 DIVIDENDS AND OTHER PAYMENT RESTRICTIONS AFFECTING RESTRICTED
SUBSIDIARIES.

        The Company shall not, and shall not permit any of its Restricted
Subsidiaries to, directly or indirectly, create or otherwise cause or suffer to
exist or become effective any encumbrance or restriction on the ability of any
Restricted Subsidiary to (i)(a) pay dividends or make any other distributions to
the Company or any of its Restricted Subsidiaries (1) on its Capital Stock or
(2) with respect to any other interest or participation in, or measured by, its
profits, or (b) pay any indebtedness owed to the Company or any of its
Restricted Subsidiaries, (ii) make loans or advances to the Company or any of
its Restricted Subsidiaries or (iii) transfer any of its properties or assets to
the Company or any of its Restricted Subsidiaries, except for such encumbrances
or restrictions existing under or by reason of (a) Existing Indebtedness as in
effect on the date hereof, (b) the New Credit Facility as in effect as of the
date hereof, and any amendments, modifications, restatements, renewals,
increases, supplements, refundings, replacements or refinancings thereof,
provided that such amendments, modifications, restatements, renewals, increases,
supplements, refundings, replacement or refinancings are no more restrictive in
the aggregate with respect to such dividend 




                                      -49-
   57

and other payment restrictions than those contained in the New Credit Facility
as in effect on the date hereof, (c) this Indenture and the Notes, (d) any
applicable law, rule, regulation or order, (e) any instrument governing
Indebtedness or Capital Stock of a Person acquired by the Company or any of its
Restricted Subsidiaries as in effect at the time of such acquisition (except to
the extent such Indebtedness was incurred in connection with or in contemplation
of such acquisition), which encumbrance or restriction is not applicable to any
Person, or the properties or assets of any Person, other than the Person, or the
property or assets of the Person, so acquired, provided that, in the case of
Indebtedness, such Indebtedness was permitted by the terms hereof to be
incurred, (f) customary non-assignment provisions in leases entered into in the
ordinary course of business and consistent with past practices, (g) purchase
money obligations for property acquired in the ordinary course of business that
impose restrictions of the nature described in clause (iii) above on the
property so acquired, (h) Permitted Refinancing Indebtedness, provided that the
material restrictions contained in the agreements governing such Permitted
Refinancing Indebtedness are no more restrictive than those contained in the
agreements governing the Indebtedness being refinanced, and (i) contracts for
the sale of assets, including without limitation customary restrictions with
respect to a Subsidiary pursuant to an agreement that has been entered into for
the sale or disposition of all or substantially all of the Capital Stock or
assets of such Subsidiary.

SECTION 4.9    INCURRENCE OF INDEBTEDNESS AND ISSUANCE OF PREFERRED STOCK.

        The Company shall not, and shall not permit any of its Subsidiaries to,
directly or indirectly, create, incur, issue, assume, guarantee or otherwise
become directly or indirectly liable, contingently or otherwise, with respect to
(collectively, "incur") any Indebtedness (including Acquired Debt) and the
Company shall not issue any Disqualified Stock and shall not permit any of its
Subsidiaries to issue any shares of preferred stock; provided, however, that the
Company may incur Indebtedness (including Acquired Debt) or issue shares of
Disqualified Stock if the Fixed Charge Coverage Ratio for the Company's most
recently ended four full fiscal quarters for which internal financial statements
are available immediately preceding the date on which such additional
Indebtedness is incurred or such Disqualified Stock is issued would have been at
least 2.0 to 1 if the date on which the Indebtedness is incurred is prior to
February 1, 2000, and at least 2.5 to 1 if the date on which the Indebtedness is
incurred is on or after February 1, 2000, determined on a pro forma basis
(including a pro forma application of the net proceeds therefrom), as if the
additional Indebtedness had been incurred, or the Disqualified Stock had been
issued, as the case may be, at the beginning of such four-quarter period.

        The provisions of the first paragraph of this covenant will not apply to
the incurrence of any of the following items of Indebtedness (collectively,
"Permitted Debt"):

                      (i     the incurrence by the Company and the Subsidiary 
Guarantors of Indebtedness pursuant to the New Credit Facility; provided that
the aggregate principal amount of all such Indebtedness (with letters of credit
being deemed to have a principal amount equal to the maximum potential liability
of the Company thereunder) outstanding under the New Credit Facility after
giving effect to such incurrence does not exceed the sum of $40.0 million.



                                      -50-
   58

                      (ii    the incurrence by the Company and its Restricted 
Subsidiaries of the Existing Indebtedness;

                      (iii) the incurrence by the Company and the Subsidiary
        Guarantors of Indebtedness represented by the Notes and the Note
        Guarantees, respectively;

                      (iv) the incurrence by the Company or any of its
        Restricted Subsidiaries of Indebtedness represented by Capital Lease
        Obligations, mortgage financings or purchase money obligations, in each
        case (other than in the case of a mortgage financing secured by the real
        estate (and personal property associated with such real estate) owned by
        the Company in San Diego, California on which the Company's headquarters
        is located on the date of the Indenture) incurred for the purpose of
        financing all or any part of the purchase price or cost of construction
        or improvement of property, plant or equipment used in the business of
        the Company or such Restricted Subsidiary (whether through the direct
        purchase of assets or the Capital Stock of any Person owning such
        Assets), in an aggregate principal amount not to exceed $10.0 million at
        any time outstanding;

                      (v) the incurrence by the Company or any of its Restricted
        Subsidiaries of Indebtedness in connection with the acquisition of
        assets or a new Restricted Subsidiary; provided that such Indebtedness
        was incurred by the prior owner of such assets or such Restricted
        Subsidiary prior to such acquisition by the Company or one of its
        Subsidiaries and was not incurred in connection with, or in
        contemplation of, such acquisition by the Company or one of its
        Subsidiaries; provided further that the principal amount (or accreted
        value, as applicable) of such Indebtedness, together with any other
        outstanding Indebtedness incurred pursuant to this clause (v), does not
        exceed $5.0 million;

                      (vi) the incurrence by the Company or any of its
        Restricted Subsidiaries of Permitted Refinancing Indebtedness in
        exchange for, or the net proceeds of which are used to refund, refinance
        or replace Indebtedness that was permitted by this Indenture to be
        incurred;

                      (vii) the incurrence by the Company or any of its
        Restricted Subsidiaries of intercompany Indebtedness between the Company
        and any of its Wholly-Owned Restricted Subsidiaries or between one
        Wholly-Owned Restricted Subsidiary and another Wholly-Owned Restricted
        Subsidiary; provided, however, that (a) if the Company is the obligor on
        such Indebtedness and the payee is not a Subsidiary Guarantor, such
        Indebtedness is expressly subordinated to the prior payment in full in
        cash of all Obligations with respect to the Notes; (b) if a Wholly-Owned
        Restricted Subsidiary that is not a Subsidiary Guarantor is the obligor
        on such Indebtedness, such Indebtedness, to the extent owing to the
        Company or any Subsidiary Guarantor, does not exceed $5.0 million in
        aggregate principal amount at any time outstanding; and (c) (x) any
        subsequent issuance or transfer of Equity Interests that results in any
        such Indebtedness being held by a Person other than the Company or a
        Wholly Owned Restricted Subsidiary and (y) any sale or other transfer of
        any such Indebtedness to a 



                                      -51-
   59

        Person that is not either the Company or a Wholly Owned Restricted
        Subsidiary shall be deemed, in each case, to constitute an incurrence of
        such Indebtedness by the Company or such Restricted Subsidiary, as the
        case may be, that was not permitted by this clause (vii);

                      (viii) the incurrence by the Company or any of its
        Restricted Subsidiaries of Hedging Obligations that are incurred for the
        purpose of fixing or hedging (a) currency risk or interest rate risk
        with respect to any floating rate Indebtedness that is permitted by the
        terms of this Indenture to be outstanding or (b) exchange rate risk with
        respect to agreements or Indebtedness of such person payable denominated
        in a currency other than U.S. dollars; provided that such agreements do
        not increase the Indebtedness of the obligor outstanding at any time
        other than as a result of fluctuations in foreign currency exchange
        rates or interest rates or by reason of fees, indemnities and
        compensation payable thereunder;

                      (ix) the Guarantee by the Company or any of its Restricted
        Subsidiaries of Indebtedness of the Company or a Restricted Subsidiary
        of the Company that was permitted to be incurred by another provision of
        this covenant;

                      (x) the incurrence by the Company's Unrestricted
        Subsidiaries of Non-Recourse Debt, provided, however, that if any such
        Indebtedness ceases to be Non-Recourse Debt of an Unrestricted
        Subsidiary, such event shall be deemed to constitute an incurrence of
        Indebtedness by a Restricted Subsidiary of the Company;

                     (xi) Indebtedness incurred by the Company or any of its
        Restricted Subsidiaries constituting reimbursement obligations with
        respect to letters of credit issued in the ordinary course of business,
        including without limitation to letters of credit in respect to workers'
        compensation claims or self-insurance, or other Indebtedness with
        respect to reimbursement type obligations regarding workers'
        compensation claims; provided, however, that upon the drawing of such
        letters of credit or the incurrence of such Indebtedness, such
        obligations are reimbursed within 30 days following such drawing or
        incurrence;

                      (xii) Indebtedness arising from agreements of the Company
        or a Restricted Subsidiary providing for indemnification, adjustment of
        purchase price or similar obligations, in each case, incurred or assumed
        in connection with the disposition of any business, asset or Subsidiary,
        other than guarantees of Indebtedness incurred by any Person acquiring
        all or any portion of such business, assets or Subsidiary for the
        purpose of financing such acquisition; provided that (a) such
        Indebtedness is not reflected on the balance sheet of the Company or any
        Restricted Subsidiary (contingent obligations referred to in a footnote
        to financial statements and not otherwise reflected on the balance sheet
        will not be deemed to be reflected on such balance sheet for purposes of
        this clause (a) and (b) the maximum assumable liability in respect of
        all such Indebtedness shall at no time exceed the gross proceeds
        including non-cash proceeds (the fair market value of such non-cash
        proceeds being measured at the time received and without giving effect
        to any subsequent changes in value) actually received by the Company and
        its Restricted Subsidiaries in connection with such disposition;



                                      -52-
   60

               (xiii) Obligations in respect of performance and surety bonds and
        completion guarantees provided by the Company or any Restricted
        Subsidiary in the ordinary course of business;

               (xiv) the incurrence by Foreign Subsidiaries which are not a
        Guarantors of Indebtedness in connection with the financing of accounts
        or notes receivable outside of the United States in an aggregate
        principal amount at any time outstanding, including all Permitted
        Refinancing Indebtedness incurred to refund, refinance or replace any
        other Indebtedness incurred pursuant to this clause (xiv) not to exceed
        $10.0 million; provided that neither the Company nor any Guarantor shall
        have guaranteed or provided credit support of any kind (including any
        undertaking, agreement or instrument which would constitute
        Indebtedness) with respect to such Indebtedness; and

                      (xv) the incurrence by the Company or any of its
        Restricted Subsidiaries of additional Indebtedness, incurred after the
        date hereof, in an aggregate principal amount (or accreted value, as
        applicable) at any time outstanding, including all Permitted Refinancing
        Indebtedness incurred to refund, refinance or replace any other
        Indebtedness incurred pursuant to this clause (xv), not to exceed $15.0
        million.

        For purposes of determining compliance with this covenant, in the event
that an item of Indebtedness meets the criteria of more than one of the
categories of Permitted Debt described in clauses (i) through (xv) above or is
entitled to be incurred pursuant to the first paragraph of this Section 4.9, the
Company shall, in its sole discretion, classify such item of Indebtedness in any
manner that complies with this Section 4.9 and such item of Indebtedness will be
treated as having been incurred pursuant to only one of such clauses or pursuant
to the first paragraph hereof. Accrual of interest and the accretion of accreted
value will not be deemed to be an incurrence of Indebtedness for purposes of
this Section 4.9.

SECTION 4.10  ASSET SALES.

        The Company shall not, and shall not permit any of its Restricted
Subsidiaries to, consummate an Asset Sale unless (i) the Company (or the
Restricted Subsidiary, as the case may be) receives consideration at the time of
such Asset Sale at least equal to the fair market value (evidenced by a
resolution of the Board of Directors set forth in an Officers' Certificate
delivered to the Trustee) of the assets or Equity Interests issued or sold or
otherwise disposed of and (ii) at least 75% of the consideration therefor
received by the Company or such Restricted Subsidiary is in the form of (a) cash
or Cash Equivalents or (b) property or assets that are used or useful in a
Permitted Business, or Capital Stock of any Person primarily engaged in a
Permitted Business if, as a result of the acquisition by the Company or any
Restricted Subsidiary thereof, such Person becomes a Restricted Subsidiary;
provided that the amount of (x) any liabilities of the Company or any Restricted
Subsidiary (other than contingent liabilities and liabilities of the Company
that are by their terms subordinated to the Notes or any guarantee thereof) that
are assumed by the transferee of any such assets pursuant to the customary
novation agreement that releases the Company or such 



                                      -53-
   61

Restricted Subsidiary from further liability and (y) any notes or other
obligations received by the Company or any such Restricted Subsidiary from such
transferee that are converted by the Company or such Restricted Subsidiary into
cash or Cash Equivalents (to the extent of the cash or Cash Equivalents
received) within 180 days following the closing of such Asset Sale, will be
deemed to be cash for purposes of this provision; provided further that the 75%
limitation referred to above shall not apply to any sale, transfer or other
disposition of assets in which the cash portion of the consideration received
therefor, determined in accordance with the foregoing proviso, is equal to or
greater than what the after-tax net proceeds would have been had such
transaction complied with the aforementioned 75% limitation.

        Within 270 days after the receipt of any Net Proceeds from an Asset
Sale, the Company may apply such Net Proceeds, at its option, (a) to permanently
repay Indebtedness outstanding under the New Credit Facility (and to
correspondingly reduce commitments with respect to the revolving borrowings
thereunder) or other Pari Passu Indebtedness, provided that if the Company shall
so repay other Pari Passu Indebtedness, it will equally and ratably reduce
Indebtedness under the Notes if the Notes are then redeemable or, if the Notes
may not be then redeemed, the Company shall make an offer to all Holders to
purchase at 100% of the principal amount thereof the amount of Notes that would
otherwise be redeemed or (b) to an investment in property, capital expenditures
or assets that are used or useful in a Permitted Business, or Capital Stock of
any Person primarily engaged in a Permitted Business if, as a result of the
acquisition by the Company or any Restricted Subsidiary thereof, such Person
becomes a Restricted Subsidiary. Any Net Proceeds from Asset Sales that are not
applied or invested as provided in the preceding sentence of this paragraph will
be deemed to constitute "Excess Proceeds." Pending the final application of any
such Net Proceeds, the Company may temporarily reduce the revolving Indebtedness
under the New Credit Facility or otherwise invest such Net Proceeds in any
manner that is not prohibited by this Indenture. Any Net Proceeds from Asset
Sales that are not applied or invested as provided in the first sentence of this
paragraph will be deemed to constitute "Excess Proceeds." When the aggregate
amount of Excess Proceeds exceeds $15.0 million, the Company will be required to
make an offer to all Holders of Notes (an "Asset Sale Offer") to purchase the
maximum principal amount of Notes that may be purchased out of the Excess
Proceeds, at an offer price in cash in an amount equal to 100% of the principal
amount thereof plus accrued and unpaid interest and Liquidated Damages, if any,
thereon, to the date of purchase, in accordance with the procedures set forth
herein. To the extent that the aggregate amount of Notes tendered pursuant to an
Asset Sale Offer is less than the Excess Proceeds, the Company may use any
remaining Excess Proceeds for general corporate purposes. If the aggregate
principal amount of Notes surrendered by Holders thereof exceeds the amount of
Excess Proceeds, the Trustee shall select the Notes to be purchased on a pro
rata basis. Upon completion of such offer to purchase, the amount of Excess
Proceeds shall be reset at zero.

SECTION 4.11  TRANSACTIONS WITH AFFILIATES.

        The Company shall not, and shall not permit any of its Restricted
Subsidiaries to, make any payment to, or sell, lease, transfer or otherwise
dispose of any of its properties or assets to, or purchase any property or
assets from, or enter into or make or amend any transaction, contract,




                                      -54-
   62

agreement, understanding, loan, advance or guarantee with, or for the benefit
of, any Affiliate (each of the foregoing, an "Affiliate Transaction") unless (i)
such Affiliate Transaction is on terms that are no less favorable to the Company
or the relevant Restricted Subsidiary than those that would have been obtained
in a comparable transaction by the Company or such Restricted Subsidiary with an
unrelated Person and (ii) the Company delivers to the Trustee (a) with respect
to any Affiliate Transaction or series of related Affiliate Transactions
involving aggregate consideration in excess of $1.0 million, a resolution of the
Board of Directors set forth in an Officers' Certificate certifying that such
Affiliate Transaction complies with clause (i) above and that such Affiliate
Transaction has been approved by a majority of the disinterested members of the
Board of Directors and (b) with respect to any Affiliate Transaction or series
of related Affiliate Transactions involving aggregate consideration in excess of
$5.0 million, an opinion as to the fairness to the Holders of such Affiliate
Transaction from a financial point of view issued by an accounting, appraisal or
investment banking firm of national standing; provided that the following shall
not be deemed Affiliate Transactions: (1) any employment agreement entered into
by the Company or any of its Restricted Subsidiaries in the ordinary course of
business and consistent with the past practice of the Company or such Restricted
Subsidiary, (2) transactions between or among the Company and/or its Restricted
Subsidiaries, (3) Permitted Investments and Restricted Payments that are
permitted by the provisions herein described above under Section 4.7, (4)
customary loans, advances, fees and compensation paid to, and indemnity provided
on behalf of, officers, directors, employees or consultants of the Company or
any of its Restricted Subsidiaries, (5) transactions in accordance with the
Securityholders Agreement, as amended; provided that no such amendment contains
any provisions that are materially adverse to the Holders of the Notes, and (6)
transactions between the Company or its Restricted Subsidiaries on the one hand,
and DLJ or its Affiliates, on the other hand, involving the provision of
financial, advisory, placement or underwriting services by DLJ; provided that
fees payable to DLJ do not exceed the usual and customary fees of DLJ for
similar services.

SECTION 4.12  LIENS.

        The Company shall not and shall not permit any of its Restricted
Subsidiaries to, create, incur, assume or otherwise cause or suffer to exist or
become effective any Lien (other than Permitted Liens) upon any of their
property or assets, now owned or hereafter acquired.

SECTION 4.13  OFFER TO PURCHASE UPON CHANGE OF CONTROL.

        Upon the occurrence of a Change of Control, each Holder of Notes will
have the right to require the Company to repurchase all or any part (equal to
$1,000 or an integral multiple thereof) of such Holder's Notes pursuant to the
offer described below (the "Change of Control Offer") at an offer price in cash
equal to 101% of the aggregate principal amount thereof plus accrued and unpaid
interest and Liquidated Damages thereon, if any, to the date of purchase (the
"Change of Control Payment"). Within 30 days following any Change of Control,
the Company will mail a notice to each Holder describing the transaction or
transactions that constitute the Change of Control and offering to repurchase
Notes on the date specified in such notice, which date shall be no earlier than
30 days and no later than 60 days from the date such notice is mailed (the
"Change of Control 



                                      -55-
   63

Payment Date"), pursuant to the procedures required by Section 3.9 hereof and
described in such notice. The Company shall comply with the requirements of Rule
14e-1 under the Exchange Act and any other securities laws and regulations
thereunder to the extent such laws and regulations are applicable in connection
with the repurchase of the Notes as a result of a Change of Control.

        On the Change of Control Payment Date, the Company shall, to the extent
lawful, (1) accept for payment all Notes or portions thereof properly tendered
pursuant to the Change of Control Offer, (2) deposit with the Paying Agent an
amount equal to the Change of Control Payment in respect of all Notes or
portions thereof so tendered and (3) deliver or cause to be delivered to the
Trustee the Notes so accepted together with an Officers' Certificate stating the
aggregate principal amount of Notes or portions thereof being purchased by the
Company. The Paying Agent will promptly mail to each Holder of Notes so tendered
the Change of Control Payment for such Notes, and the Trustee will promptly
authenticate and mail (or cause to be transferred by book entry) to each Holder
a new Note equal in principal amount to any unpurchased portion of the Notes
surrendered, if any; provided that each such new Note will be in a principal
amount of $1,000 or an integral multiple thereof.

        The Change of Control provisions described above will be applicable
whether or not any other provisions of this Indenture are applicable. Except as
described above with respect to a Change of Control, this Indenture does not
contain provisions that permit the Holders of the Notes to require that the
Company repurchase or redeem the Notes in the event of a takeover,
recapitalization or similar transaction.

        The Company shall not be required to make a Change of Control Offer upon
a Change of Control if a third party makes the Change of Control Offer in the
manner, at the times and otherwise in compliance with the requirements set forth
herein applicable to a Change of Control Offer made by the Company and purchases
all Notes validly tendered and not withdrawn under such Change of Control Offer.

SECTION 4.14  CORPORATE EXISTENCE.

        Subject to Section 4.13 and Article 5 hereof, as the case may be, the
Company and each Subsidiary Guarantor shall do or cause to be done all things
necessary to preserve and keep in full force and effect its corporate existence
and the corporate, partnership or other existence of each of its Subsidiaries in
accordance with the respective organizational documents (as the same may be
amended from time to time) of the Company or any such Subsidiary and the rights
(charter and statutory), licenses and franchises of the Company and its
Subsidiaries; provided that the Company shall not be required to preserve any
such right, license or franchise, or the corporate, partnership or other
existence of any of its Subsidiaries, if the Board of Directors of the Company
shall determine that the preservation thereof is no longer desirable in the
conduct of the business of the Company and its Subsidiaries, taken as a whole,
and that the loss thereof is not adverse in any material respect to the Holders
of the Notes.


                                      -56-

   64

SECTION 4.15 LIMITATION ON ISSUANCES OF CAPITAL STOCK OF WHOLLY-OWNED RESTRICTED
SUBSIDIARIES.

        The Company (i) shall not, and shall not permit any Wholly-Owned
Restricted Subsidiary of the Company to, transfer, convey, sell, lease or
otherwise dispose of any Capital Stock of any Wholly-Owned Subsidiary of the
Company to any Person (other than the Company or a Wholly-Owned Restricted
Subsidiary of the Company), unless (a) such transfer, conveyance, sale, lease or
other disposition is of all the Capital Stock of such Wholly-Owned Restricted
Subsidiary and (b) the cash Net Proceeds from such transfer, conveyance, sale,
lease or other disposition are applied in accordance with Section 4.10 hereof
and (ii) will not permit any Wholly-Owned Restricted Subsidiary of the Company
to issue any of its Equity Interests (other than, if necessary, shares of its
Capital Stock constituting directors' qualifying shares) to any Person other
than to the Company or a Wholly-Owned Restricted Subsidiary of the Company.

SECTION 4.16  LIMITATIONS ON ISSUANCES OF GUARANTEES OF INDEBTEDNESS.

        The Company shall not permit any Restricted Subsidiary, directly or
indirectly, to Guarantee or pledge any assets to secure the payment of any other
Indebtedness of the Company unless either such Restricted Subsidiary (x) is a
Subsidiary Guarantor or (y) simultaneously executes and delivers a supplemental
indenture to this Indenture providing for the Guarantee of the payment of the
Notes by such Restricted Subsidiary, which Guarantee shall be senior to or pari
passu with such Restricted Subsidiary's Guarantee of or pledge to secure such
other Indebtedness. Notwithstanding the foregoing, any such Guarantee by a
Restricted Subsidiary of the Notes shall provide by its terms that it shall be
automatically and unconditionally released and discharged upon any sale,
exchange or transfer, to any Person not an Affiliate of the Company, of all of
the Company's stock in, or all or substantially all the assets of, such
Restricted Subsidiary, which sale, exchange or transfer is made in compliance
with the applicable provisions hereof. The form and substance of such Guarantee
shall be substantially similar to EXHIBIT E hereto.

SECTION 4.17  BUSINESS ACTIVITIES.

        The Company shall not, and shall not permit any Restricted Subsidiary
to, engage in any business other than Permitted Businesses, except to such
extent as would not be material to the Company and its Restricted Subsidiaries
taken as a whole.

SECTION 4.18  ADDITIONAL GUARANTEES.

        If (i) the Company or any of its Restricted Subsidiaries shall, after
the date hereof, transfer or cause to be transferred, including by way of any
Investment, in one or a series of transactions (whether or not related), any
assets, businesses, divisions, real property or equipment having an aggregate
fair market value (as determined in good faith by the Board of Directors) in
excess of $1.0 million to any Restricted Subsidiary that is not a Subsidiary
Guarantor or a Foreign Subsidiary, (ii) the Company or any of its Restricted
Subsidiaries shall acquire another Restricted Subsidiary, 



                                      -57-
   65

other than a Foreign Subsidiary, having total assets with a fair market value
(as determined in good faith by the Board of Directors) in excess of $1.0
million, or (iii) if any Restricted Subsidiary other than a Foreign Subsidiary
shall incur Acquired Debt in excess of $1.0 million, then the Company shall, at
the time of such transfer, acquisition or incurrence, (A) cause such transferee,
acquired Restricted Subsidiary or Restricted Subsidiary incurring Acquired Debt
(if not then a Subsidiary Guarantor) to execute a Note Guarantee of the
Obligations of the Company under the Notes in the form and substance
substantially similar to EXHIBIT E hereto and (B) deliver to the Trustee an
Opinion of Counsel, in form reasonably satisfactory to the Trustee, that such
Note Guarantee is a valid, binding and enforceable obligation of such
transferee, acquired Restricted Subsidiary or Restricted Subsidiary incurring
Acquired Debt, subject to customary exceptions for bankruptcy, fraudulent
conveyance and equitable principles. Notwithstanding the foregoing, the Company
or any of its Restricted Subsidiaries may make a Restricted Investment in any
Wholly-Owned Restricted Subsidiary of the Company without compliance with this
Section 4.18, provided that such Restricted Investment is permitted by Section
4.7 hereof.

SECTION 4.19  PAYMENT FOR CONSENTS.

        Neither the Company nor any of its Subsidiaries shall, directly or
indirectly, pay or cause to be paid any consideration, whether by way of
interest, fee or otherwise, to any Holder of any Notes for or as an inducement
to any consent, waiver or amendment of any of the terms or provisions hereof or
the Notes unless such consideration is offered to be paid or is paid to all
Holders of the Notes that consent, waive or agree to amend in the time frame set
forth in the solicitation documents relating to such consent, waiver or
agreement.


                                    ARTICLE 5

                                   SUCCESSORS

SECTION 5.1  MERGER, CONSOLIDATION OF SALE OF ASSETS.

        The Company shall not consolidate or merge with or into (whether or not
the Company is the surviving corporation), or sell, assign, transfer, lease,
convey or otherwise dispose of all or substantially all of its properties or
assets in one or more related transactions, to another Person unless (i) the
Company is the surviving corporation or the Person formed by or surviving any
such consolidation or merger (if other than the Company) or to which such sale,
assignment, transfer, lease, conveyance or other disposition shall have been
made is a corporation organized or existing under the laws of the United States,
any state thereof or the District of Columbia; (ii) the Person formed by or
surviving any such consolidation or merger (if other than the Company) or the
Person to which such sale, assignment, transfer, lease, conveyance or other
disposition shall have been made assumes all the obligations of the Company
under the Notes and this Indenture pursuant to a supplemental indenture in a
form substantially similar to EXHIBIT E hereto; (iii) immediately after such
transaction no Default or Event of Default exists; (iv) except in the case of a
merger of the 



                                      -58-
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Company with or into a Wholly-Owned Restricted Subsidiary of the Company, the
Company or the entity or Person formed by or surviving any such consolidation or
merger (if other than the Company), or to which such sale, assignment, transfer,
lease, conveyance or other disposition shall have been made will, at the time of
such transaction and after giving pro forma effect thereto as if such
transaction had occurred at the beginning of the applicable four-quarter period,
be permitted to incur at least $1.00 of additional Indebtedness pursuant to the
Fixed Charge Coverage Ratio test set forth in the first paragraph of the Section
4.9 hereof; and (v) each Subsidiary Guarantor, unless it is the other party to
the transactions described above, shall have by supplemental indenture confirmed
that its Note Guarantee shall apply to such Person's obligations hereunder and
under the Notes.

SECTION 5.2    SUCCESSOR CORPORATION SUBSTITUTED.

        Upon any consolidation or merger, or any sale, assignment, transfer,
lease, conveyance or other disposition of all or substantially all of the assets
of the Company in accordance with Section 5.1 hereof, the successor corporation
formed by such consolidation or into or with which the Company is merged or to
which such sale, assignment, transfer, lease, conveyance or other disposition is
made shall succeed to, and be substituted for (so that from and after the date
of such consolidation, merger, sale, lease, conveyance or other disposition, the
provisions of this Indenture referring to the "Company" shall refer instead to
the successor corporation and not to the Company), and shall exercise every
right and power of the Company under this Indenture with the same effect as if
such successor Person had been named as the Company herein; provided, that, (i)
solely for the purposes of computing Consolidated Net Income for purposes of
clause (b) of the first paragraph of Section 4.7 hereof, the Consolidated Net
Income of any person other than the Company and its Subsidiaries shall be
included only for periods subsequent to the effective time of such merger,
consolidation, combination or transfer of assets; and (ii) in the case of any
sale, assignment, transfer, lease, conveyance, or other disposition of less than
all of the assets of the predecessor Company, the predecessor Company shall not
be released or discharged from the obligation to pay the principal of or
interest and Liquidated Damages, if any, on the Notes.


                                    ARTICLE 6

                              DEFAULTS AND REMEDIES

SECTION 6.1  EVENTS OF DEFAULT.

        Each of the following constitutes an "Event of Default":

                      (i)    default for 30 days in the payment when due of 
interest on, or Liquidated Damages with respect to, the Notes;

                      (ii)   default in payment when due of principal of or 
premium, if any, on the Notes;



                                      -59-
   67

                      (iii)  failure by the Company to comply with the 
provisions described under Sections 4.10 or 4.13 or Article 5 hereof;

                      (iv)   failure by the Company for 30 days after notice 
from the Trustee or at least 25% in principal amount of the Notes then
outstanding to comply with the provisions described under Sections 4.7 or 4.9
hereof;

                      (v)    failure by the Company for 60 days after notice 
from the Trustee or at least 25% in principal amount of the Notes then
outstanding to comply with any of its other agreements in this Indenture or the
Notes;

                      (vi)   default under any mortgage, indenture or instrument
under which there may be issued or by which there may be secured or evidenced
any Indebtedness for money borrowed by the Company or any of its Subsidiaries
(or the payment of which is guaranteed by the Company or any of its
Subsidiaries) whether such Indebtedness or Guarantee now exists, or is created
after the date hereof, which default (a) is caused by a failure to pay principal
of or premium, if any, or interest on such Indebtedness prior to the expiration
of the grace period provided in such Indebtedness on the date of such default (a
"Payment Default") or (b) results in the acceleration of such Indebtedness prior
to its express maturity and, in each case, the principal amount of any such
Indebtedness, together with the principal amount of any other such Indebtedness
under which there has been a Payment Default or the maturity of which has been
so accelerated, aggregates $5.0 million or more;

                      (vii)  failure by the Company or any of its Subsidiaries 
to pay final judgments aggregating in excess of $5.0 million, which judgments
are not paid, discharged or stayed for a period of 60 days;

                      (viii) the Company or any of its Subsidiaries, pursuant to
or within the meaning of Bankruptcy Law:

                             (a)    commences a voluntary case,

                             (b)    consents to the entry of an order for relief
against it in an involuntary case,

                             (c)    consents to the appointment of a Custodian 
of it or for all or substantially all of its property,

                             (d)    makes a general assignment for the benefit 
of its creditors, or

                             (e)    generally is not paying its debts as they
become due; or



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                      (ix)   a court of competent jurisdiction enters an order 
or decree under any Bankruptcy Law that:

                             (a)    is for relief against the Company or any of
its Subsidiaries in an involuntary case;

                             (b)    appoints a Custodian of the Company or any
of its Subsidiaries or for all or substantially all of the property of the 
Company or any of its Subsidiaries; or

                             (c)    orders the liquidation of the Company or any
of its Subsidiaries;

        and the order or decree remains unstayed and in effect for 60
consecutive days.

        The term "Custodian" means any receiver, trustee, assignee, liquidator
or similar official under any Bankruptcy Law.

SECTION 6.2  ACCELERATION.

        If any Event of Default occurs and is continuing, the Trustee or the
Holders of at least 25% in principal amount of the then outstanding Notes may
declare all the Notes to be due and payable immediately. Notwithstanding the
foregoing, in the case of an Event of Default as described in (viii) and (ix) of
Section 6.1 hereof, all outstanding Notes will become due and payable without
further action or notice. Holders of the Notes may not enforce this Indenture or
the Notes except as provided in this Indenture. Subject to certain limitations,
Holders of a majority in principal amount of the then outstanding Notes may
direct the Trustee in its exercise of any trust or power. The Trustee may
withhold from Holders of the Notes notice of any continuing Default or Event of
Default (except a Default or Event of Default relating to the payment of
principal or interest) if it determines that withholding notice is in their
interest.

        In the case of any Event of Default occurring by reason of any willful
action (or inaction) taken (or not taken) by or on behalf of the Company with
the intention of avoiding payment of the premium that the Company would have had
to pay if the Company then had elected to redeem the Notes pursuant to the
optional redemption provisions of Section 3.7(a) hereof, an equivalent premium
shall also become and be immediately due and payable to the extent permitted by
law upon the acceleration of the Notes. If an Event of Default occurs prior to
February 1, 2002 by reason of any willful action (or inaction) taken (or not
taken) by or on behalf of the Company with the intention of avoiding the
prohibition on redemption of the Notes prior to February 1, 2002, then the
amount payable in respect of such Notes for purposes of this paragraph for each
of the twelve-month periods beginning on February 1 of the years indicated below
shall be set forth below, expressed as percentages of the principal amount that
would otherwise be due but for the provisions of this sentence, plus accrued and
unpaid interest and Liquidated Damages, if any, to the date of payment:



                                      -61-
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                              Year                      Percentage
                                                         
         1998........................................      116.125%
         1999........................................      113.438%
         2000........................................      110.750%
         2001........................................      108.063%


SECTION 6.3  OTHER REMEDIES.

        If an Event of Default occurs and is continuing, the Trustee may pursue
any available remedy to collect the payment of principal, premium, if any,
interest and Liquidated Damages, if any, on the Notes or to enforce the
performance of any provision of the Notes or this Indenture.

        The Trustee may maintain a proceeding even if it does not possess any of
the Notes or does not produce any of them in the proceeding. A delay or omission
by the Trustee or any Holder of a Note in exercising any right or remedy
accruing upon an Event of Default shall not impair the right or remedy or
constitute a waiver of or acquiescence in the Event of Default.
All remedies are cumulative to the extent permitted by law.

        The Company is required to deliver to the Trustee annually a statement
regarding compliance with this Indenture, and the Company is required upon
becoming aware of any Default or Event of Default, to deliver to the Trustee a
statement specifying such Default or Event of Default.

SECTION 6.4  WAIVER OF PAST DEFAULTS.

        The Holders of a majority in aggregate principal amount of the Notes
then outstanding by notice to the Trustee may on behalf of the Holders of all of
the Notes waive any existing Default or Event of Default and its consequences
under this Indenture except a continuing Default or Event of Default in the
payment of interest on, or the principal of, the Notes.

SECTION 6.5  CONTROL BY MAJORITY.

        The Holders of a majority in principal amount of the then outstanding
Notes may direct the time, method and place of conducting any proceeding for
exercising any remedy available to the Trustee or exercising any trust power
conferred on it. However, (i) the Trustee may refuse to follow any direction
that conflicts with law or this Indenture, that the Trustee determines may be
unduly prejudicial to the rights of other Holders of Notes or that may involve
the Trustee in personal liability, and (ii) the Trustee may take any other
action deemed proper by the Trustee which is not inconsistent with such
direction. In case an Event of Default shall occur (which shall not be cured),
the Trustee will be required, in the exercise of its power, to use the degree of
care of a prudent person in the conduct of such person's own affairs.
Notwithstanding any provision to the contrary in this Indenture, the Trustee is
under no obligation to exercise any of its rights or powers under this 



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Indenture at the request of any Holder of Notes, unless such Holder shall offer
to the Trustee security and indemnity satisfactory to it against any loss,
liability or expense.

SECTION 6.6  LIMITATION ON SUITS.

        A Holder of a Note may pursue a remedy with respect to this Indenture,
the Note Guarantees or the Notes only if:

        (a)    the Holder of a Note gives to the Trustee written notice of a
continuing Event of Default or the Trustee receives such notice from the
Company;

        (b)    the Holders of at least 25% in principal amount of the then
outstanding Notes make a written request to the Trustee to pursue the remedy;

        (c)    such Holder of a Note or Holders of Notes offer and, if
requested, provide to the Trustee indemnity satisfactory to the Trustee against
any loss, liability or expense;

        (d)    the Trustee does not comply with the request within 60 days after
receipt of the request and the offer and, if requested, the provision of
indemnity; and

        (e)    during such 60-day period the Holders of a majority in principal
amount of the then outstanding Notes do not give the Trustee a direction
inconsistent with the request.

        A Holder of a Note may not use this Indenture to prejudice the rights of
another Holder of a Note or to obtain a preference or priority over another
Holder of a Note.

SECTION 6.7  RIGHTS OF HOLDERS OF NOTES TO RECEIVE PAYMENT.

        Notwithstanding any other provision of this Indenture, the right of any
Holder of a Note to receive payment of principal, premium, if any, interest, and
Liquidated Damages, if any, on the Note, on or after the respective due dates
expressed in the Note (including in connection with an offer to purchase), or to
bring suit for the enforcement of any such payment on or after such respective
dates, shall not be impaired or affected without the consent of such Holder.

SECTION 6.8  COLLECTION SUIT BY TRUSTEE.

        If an Event of Default specified in Section 6.1(i) or (ii) hereof occurs
and is continuing, the Trustee is authorized to recover judgment in its own name
and as trustee of an express trust against the Company for the whole amount of
principal of, premium and Liquidated Damages, if any, and interest remaining
unpaid on the Notes and interest on overdue principal and, to the extent lawful,
interest and such further amount as shall be sufficient to cover the costs and
expenses of collection, including the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel.



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SECTION 6.9  TRUSTEE MAY FILE PROOFS OF CLAIM.

        The Trustee is authorized to file such proofs of claim and other papers
or documents as may be necessary or advisable in order to have the claims of the
Trustee (including any claim for the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel) and the
Holders of the Notes allowed in any judicial proceedings relative to the Company
(or any other obligor upon the Notes), its creditors or its property and shall
be entitled and empowered to collect, receive and distribute any money or other
securities or property payable or deliverable upon the conversion or exchange of
the Notes or on any such claims and any Custodian in any such judicial
proceeding is hereby authorized by each Holder to make such payments to the
Trustee, and in the event that the Trustee shall consent to the making of such
payments directly to the Holders, to pay to the Trustee any amount due to it for
the reasonable compensation, expenses, disbursements and advances of the
Trustee, its agents and counsel, and any other amounts due the Trustee under
Section 7.7 hereof. To the extent that the payment of any such compensation,
expenses, disbursements and advances of the Trustee, its agents and counsel, and
any other amounts due the Trustee under Section 7.7 hereof out of the estate in
any such proceeding, shall be denied for any reason, payment of the same shall
be secured by a Lien on, and shall be paid out of, any and all distributions,
dividends, money, securities and other properties that the Holders may be
entitled to receive in such proceeding whether in liquidation or under any plan
of reorganization or arrangement or otherwise. Nothing herein contained shall be
deemed to authorize the Trustee to authorize or consent to or accept or adopt on
behalf of any Holder any plan of reorganization, arrangement, adjustment or
composition affecting the Notes or the rights of any Holder, or to authorize the
Trustee to vote in respect of the claim of any Holder in any such proceeding.

SECTION 6.10  PRIORITIES.

        If the Trustee collects any money pursuant to this Article 6, it shall
pay out the money in the following order:

        First: to the Trustee, its agents and attorneys for amounts due under
Section 7.7 hereof, including payment of all compensation, expense and
liabilities incurred, and all advances made, by the Trustee and the costs and
expenses of collection;

        Second: to Holders of Notes for amounts due and unpaid on the Notes for
principal, premium, if any, interest, and Liquidated Damages, if any, ratably,
without preference or priority of any kind, according to the amounts due and
payable on the Notes for principal, premium, if any, interest, and Liquidated
Damages, if any, respectively;

        Third: without duplication, to the Holders for any other Obligations
owing to the Holders under this Indenture and the Notes; and

        Fourth: to the Company or to such party as a court of competent
jurisdiction shall direct.



                                      -64-
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        The Trustee may fix a record date and payment date for any payment to
Holders of Notes pursuant to this Section 6.10.

SECTION 6.11  UNDERTAKING FOR COSTS.

        In any suit for the enforcement of any right or remedy under this
Indenture or in any suit against the Trustee for any action taken or omitted by
it as a Trustee, a court in its discretion may require the filing by any party
litigant in the suit of an undertaking to pay the costs of the suit, and the
court in its discretion may assess reasonable costs, including reasonable
attorneys' fees, against any party litigant in the suit, having due regard to
the merits and good faith of the claims or defenses made by the party litigant.
This Section 6.11 does not apply to a suit by the Trustee, a suit by a Holder of
a Note pursuant to Section 6.7 hereof, or a suit by Holders of more than 10% in
principal amount of the then outstanding Notes.


                                    ARTICLE 7

                                     TRUSTEE

SECTION 7.1  DUTIES OF TRUSTEE.

        (a)    If an Event of Default has occurred and is continuing of which a
Responsible Officer of the Trustee has knowledge, the Trustee shall exercise
such of the rights and powers vested in it by this Indenture and use the same
degree of care and skill in its exercise, as a prudent man would exercise or use
under the circumstances in the conduct of his own affairs.

        (b)    Except during the continuance of an Event of Default:

                      (i)    the duties of the Trustee shall be determined 
solely by the express provisions of this Indenture or the TIA and the Trustee
need perform only those duties that are specifically set forth in this Indenture
or the TIA and no others, and no implied covenants or obligations shall be read
into this Indenture against the Trustee; and

                      (ii)   in the absence of bad faith on its part, the 
Trustee may conclusively rely, as to the truth of the statements and the
correctness of the opinions expressed therein, upon certificates or opinions
furnished to the Trustee and conforming to the requirements of this Indenture.
However, the Trustee shall examine the certificates and opinions to determine
whether or not they conform to the requirements of this Indenture.

        (c)    The Trustee may not be relieved from liabilities for its own
negligent action, its own negligent failure to act, or its own willful
misconduct, except that:



                                      -65-
   73

                      (i)    this paragraph does not limit the effect of 
paragraph (b) of this Section 7.1;

                      (ii)   the Trustee shall not be liable for any error of 
judgment made in good faith by a Responsible Officer, unless it is proved that
the Trustee was negligent in ascertaining the pertinent facts; and

                      (iii)  the Trustee shall not be liable with respect to any
action it takes or omits to take in good faith in accordance with a direction
received by it pursuant to Section 6.5 hereof.

        (d)    Whether or not therein expressly so provided, every provision of
this Indenture that in any way relates to the Trustee is subject to paragraphs
(a), (b) and (c) of this Section 7.1.

        (e)    No provision of this Indenture shall require the Trustee to
expend or risk its own funds or incur any liability. The Trustee shall be under
no obligation to exercise any of its rights and powers under this Indenture at
the request of any Holders, unless such Holder shall have offered to the Trustee
security and indemnity satisfactory to it against any loss, liability or
expense.

        (f)    The Trustee shall not be liable for interest on any money
received by it except as the Trustee may agree in writing with the Company.
Money held in trust by the Trustee need not be segregated from other funds
except to the extent required by law.

SECTION 7.2  RIGHTS OF TRUSTEE.

        (a)    The Trustee may conclusively rely on the truth of the statements
and correctness of the opinions contained in, and shall be protected from acting
or refraining from acting upon, any document believed by it to be genuine and to
have been signed or presented by the proper Person. The Trustee need not
investigate any fact or matter stated in the document.

        (b)    Before the Trustee acts or refrains from acting, it may require
an Officers' Certificate or an Opinion of Counsel or both. The Trustee shall not
be liable for any action it takes or omits to take in good faith in reliance on
such Officers' Certificate or Opinion of Counsel. Prior to taking, suffering or
admitting any action, the Trustee may consult with counsel of the Trustee's own
choosing and the written advice of such counsel or any Opinion of Counsel shall
be full and complete authorization and protection from liability in respect of
any action taken, suffered or omitted by it hereunder in good faith and in
reliance thereon.

        (c)    The Trustee may act through its attorneys and agents and shall
not be responsible for the misconduct or negligence of any agent appointed with
due care.

        (d)    The Trustee shall not be liable for any action it takes or omits
to take in good faith that it believes to be authorized or within the rights or
powers conferred upon it by this Indenture.



                                      -66-
   74

        (e)    Unless otherwise specifically provided in this Indenture, any
demand, request, direction or notice from the Company or any Subsidiary
Guarantor shall be sufficient if signed by an Officer of the Company or
Subsidiary Guarantor, as applicable.

        (f)    The Trustee shall be under no obligation to exercise any of the
rights or powers vested in it by this Indenture at the request or direction of
any of the Holders unless such Holders shall have offered to the Trustee
reasonable security or indemnity satisfactory to the Trustee against the costs,
expenses and liabilities that might be incurred by it in compliance with such
request or direction.

SECTION 7.3  INDIVIDUAL RIGHTS OF TRUSTEE.

        The Trustee in its individual or any other capacity may become the owner
of Notes and may otherwise deal with the Company, the Subsidiary Guarantors or
any Affiliate of the Company or any Subsidiary Guarantor with the same rights it
would have if it were not Trustee. However, in the event that the Trustee
acquires any conflicting interest it must eliminate such conflict within 90
days, apply to the Commission for permission to continue as Trustee or resign.
Any Agent may do the same with like rights and duties. The Trustee is also
subject to Sections 7.10 and 7.11 hereof.

SECTION 7.4  TRUSTEE'S DISCLAIMER.

        The Trustee shall not be responsible for and makes no representation as
to the validity or adequacy of this Indenture, the Note Guarantees or the Notes,
it shall not be accountable for the Company's use of the proceeds from the Notes
or any money paid to the Company or upon the Company's direction under any
provision of this Indenture, it shall not be responsible for the use or
application of any money received by any Paying Agent other than the Trustee,
and it shall not be responsible for any statement or recital herein or any
statement in the Notes or any other document in connection with the sale of the
Notes or pursuant to this Indenture other than its certificate of
authentication.

SECTION 7.5  NOTICE OF DEFAULTS.

        If a Default or Event of Default occurs and is continuing and if it is
known to a Responsible Officer of the Trustee, the Trustee shall mail to Holders
of Notes a notice of the Default or Event of Default within 90 days after it
occurs. Except in the case of a Default or Event of Default in payment on any
Note pursuant to Section 6.1(i) or (ii) hereof, the Trustee may withhold the
notice if and so long as a committee of its Responsible Officers in good faith
determines that withholding the notice is in the interests of the Holders of the
Notes.

SECTION 7.6  REPORTS BY TRUSTEE TO HOLDERS OF THE NOTES.



                                      -67-
   75

        Within 60 days after each May 15 beginning with the May 15 following the
date of this Indenture, and for so long as Notes remain outstanding, the Trustee
shall mail to the Holders of the Notes a brief report dated as of such reporting
date that complies with TIA Section 313(a) (but if no event described in TIA
Section 313(a) has occurred within the twelve months preceding the reporting
date, no report need be transmitted). The Trustee also shall comply with TIA
Section 313(b). The Trustee shall also transmit by mail all reports as required
by TIA Section 313(c).

        A copy of each report at the time of its mailing to the Holders of Notes
shall be mailed to the Company and filed with the Commission and each stock
exchange on which the Company has informed the Trustee in writing the Notes are
listed in accordance with TIA Section 313(d). The Company shall promptly notify
the Trustee when the Notes are listed on any stock exchange and of any delisting
thereof.

SECTION 7.7  COMPENSATION AND INDEMNITY.

        The Company and the Subsidiary Guarantors shall pay to the Trustee from
time to time reasonable compensation for its acceptance of this Indenture and
services hereunder. To the extent permitted by law, the Trustee's compensation
shall not be limited by any law on compensation of a trustee of an express
trust. The Company shall reimburse the Trustee promptly upon request for all
reasonable disbursements, advances and expenses incurred or made by it in
addition to the compensation for its services. Such expenses shall include the
reasonable compensation, disbursements and expenses of the Trustee's agents and
counsel.

        The Company and the Subsidiary Guarantors shall indemnify the Trustee
against any and all losses, liabilities or expenses incurred by it arising out
of or in connection with the acceptance or administration of its duties under
this Indenture, including the costs and expenses of enforcing this Indenture
against the Company and the Subsidiary Guarantors (including this Section 7.7)
and defending itself against any claim (whether asserted by the Company, the
Subsidiary Guarantors or any Holder or any other person) or liability in
connection with the exercise or performance of any of its powers or duties
hereunder except to the extent any such loss, liability or expense may be
attributable to its negligence or bad faith. The Trustee shall notify the
Company and the Subsidiary Guarantors promptly of any claim for which it may
seek indemnity. Failure by the Trustee to so notify the Company and the
Subsidiary Guarantors shall not relieve the Company and the Subsidiary
Guarantors of its obligations hereunder. The Company and the Subsidiary
Guarantors shall defend the claim and the Trustee shall cooperate in the
defense. The Trustee may have separate counsel and the Company and the
Subsidiary Guarantors shall pay the reasonable fees and expenses of such
counsel. The Company and the Subsidiary Guarantors need not pay for any
settlement made without its consent, which consent shall not be unreasonably
withheld.

        The obligations of the Company and the Subsidiary Guarantors under this
Section 7.7 shall survive the satisfaction and discharge of this Indenture.



                                      -68-
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        To secure the Company's and the Subsidiary Guarantors' payment
obligations in this Section 7.7, the Trustee shall have a Lien prior to the
Notes on all money or property held or collected by the Trustee, except that
held in trust to pay principal, interest and Liquidated Damages, if any, on
particular Notes. Such Lien shall survive the satisfaction and discharge of this
Indenture and the resignation or removal of the Trustee.

        When the Trustee incurs expenses or renders services after an Event of
Default specified in Section 6.1(viii) or (ix) hereof occurs, the expenses and
the compensation for the services (including the fees and expenses of its agents
and counsel) are intended to constitute expenses of administration under any
Bankruptcy Law.

        The Trustee shall comply with the provisions of TIA Section 313(b)(2) to
the extent applicable.

SECTION 7.8  REPLACEMENT OF TRUSTEE.

        A resignation or removal of the Trustee and appointment of a successor
Trustee shall become effective only upon the successor Trustee's acceptance of
appointment as provided in this Section 7.8.

        The Trustee may resign in writing at any time and be discharged from the
trust hereby created by so notifying the Company. The Holders of a majority in
principal amount of the then outstanding Notes may remove the Trustee by so
notifying the Trustee and the Company in writing. The Company may remove the
Trustee if:

        (a)    the Trustee fails to comply with Section 7.10 hereof;

        (b)    the Trustee is adjudged a bankrupt or an insolvent or an order
for relief is entered with respect to the Trustee under any Bankruptcy Law;

        (c)    a Custodian or public officer takes charge of the Trustee or its
property; or

        (d)    the Trustee becomes incapable of acting.

        If the Trustee resigns or is removed or if a vacancy exists in the
office of Trustee for any reason, the Company shall promptly appoint a successor
Trustee. Within one year after the successor Trustee takes office, the Holders
of a majority in principal amount of the then outstanding Notes may appoint a
successor Trustee to replace the successor Trustee appointed by the Company.

        If a successor Trustee does not take office within 60 days after the
retiring Trustee resigns or is removed, the retiring Trustee, the Company, or
the Holders of at least 10% in principal amount of the then outstanding Notes
may petition any court of competent jurisdiction for the appointment of a
successor Trustee.



                                      -69-
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        If the Trustee, after written request by any Holder of a Note who has
been a Holder of a Note for at least six months, fails to comply with Section
7.10 hereof, such Holder of a Note may petition any court of competent
jurisdiction for the removal of the Trustee and the appointment of a successor
Trustee.

        A successor Trustee shall deliver a written acceptance of its
appointment to the retiring Trustee and to the Company. Thereupon, the
resignation or removal of the retiring Trustee shall become effective, and the
successor Trustee shall have all the rights, powers and the duties of the
Trustee under this Indenture. The successor Trustee shall mail a notice of its
succession to the Holders of the Notes. The retiring Trustee shall promptly
transfer all property held by it as Trustee to the successor Trustee, provided
that all sums owing to the Trustee hereunder have been paid and subject to the
Lien provided for in Section 7.7 hereof. Notwithstanding replacement of the
Trustee pursuant to this Section 7.8, the Company's obligations under Section
7.7 hereof shall continue for the benefit of the retiring Trustee.

SECTION 7.9  SUCCESSOR TRUSTEE BY MERGER, ETC.

        If the Trustee or any Agent consolidates, merges or converts into, or
transfers all or substantially all of its corporate trust business (including
the trust created by this Indenture) to, another corporation, the successor
corporation without any further act shall be the successor Trustee or any Agent,
as applicable.

SECTION 7.10  ELIGIBILITY; DISQUALIFICATION.

        There shall at all times be a Trustee hereunder that is a corporation
organized and doing business under the laws of the United States of America or
of any state thereof that is authorized under such laws to exercise corporate
trustee power, that is subject to supervision or examination by federal or state
authorities. The Trustee (or, if the Trustee is a subsidiary of a bank holding
company, its parent) shall at all times have a combined capital surplus of at
least $50.0 million as set forth in its most recent annual report of condition.

        This Indenture shall always have a Trustee who satisfies the
requirements of TIA Section 310(a)(1), (2) and (5). The Trustee is subject to
TIA Section 310(b).

SECTION 7.11  PREFERENTIAL COLLECTION OF CLAIMS AGAINST THE COMPANY.

        The Trustee is subject to TIA Section 311(a), excluding any creditor
relationship listed in TIA Section 311(b). A Trustee who has resigned or been
removed shall be subject to TIA Section 311(a) to the extent indicated therein.


                                    ARTICLE 8



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                    LEGAL DEFEASANCE AND COVENANT DEFEASANCE

SECTION 8.1  OPTION TO EFFECT LEGAL DEFEASANCE OR COVENANT DEFEASANCE.

        The Company and the Subsidiary Guarantors may, at the option of their
respective Boards of Directors evidenced by a resolution set forth in an
Officers' Certificate, at any time, elect to have either Section 8.2 or 8.3
hereof be applied to all outstanding Notes and Note Guarantees upon compliance
with the conditions set forth below in this Article 8.

SECTION 8.2  LEGAL DEFEASANCE AND DISCHARGE.

        Upon the Company's exercise under Section 8.1 hereof of the option
applicable to this Section 8.2, the Company and each Subsidiary Guarantor shall,
subject to the satisfaction of the conditions set forth in Section 8.4 hereof,
be deemed to have been discharged from their respective obligations with respect
to all outstanding Notes and Note Guarantees on the date the conditions set
forth below are satisfied (hereinafter, "Legal Defeasance"). For this purpose,
Legal Defeasance means that the Company and each Subsidiary Guarantor shall be
deemed to have paid and discharged the entire Indebtedness represented by the
outstanding Notes and Note Guarantees, which shall thereafter be deemed to be
"outstanding" only for the purposes of Section 8.5 hereof and the other Sections
of this Indenture referred to in (a) and (b) below, and to have satisfied all
their respective other obligations under such Notes and Note Guarantees and this
Indenture (and the Trustee, on demand of and at the expense of the Company,
shall execute proper instruments acknowledging the same), except for the
following provisions which shall survive until otherwise terminated or
discharged hereunder: (a) the rights of Holders of outstanding Notes to receive
payments in respect of the principal of, premium, if any, and interest and
Liquidated Damages, if any, on such Notes when such payments are due from the
trust referred to in Section 8.4(a); (b) the Company's obligations with respect
to such Notes under Sections 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.10 and 4.2 hereof;
(c) the rights, powers, trusts, duties and immunities of the Trustee including
without limitation thereunder Section 7.7, 8.5 and 8.7 hereof and the Company's
obligations in connection therewith and (d) the provisions of this Article 8.
Subject to compliance with this Article 8, the Company may exercise its option
under this Section 8.2 notwithstanding the prior exercise of its option under
Section 8.3 hereof.

SECTION 8.3  COVENANT DEFEASANCE.

        Upon the Company's exercise under Section 8.1 hereof of the option
applicable to this Section 8.3, the Company and each Subsidiary Guarantor shall,
subject to the satisfaction of the conditions set forth in Section 8.4 hereof,
be released from its obligations under the covenants contained in Sections 3.9,
4.5, 4.7, 4.8, 4.9, 4.10, 4.11, 4.12, 4.13, 4.14, 4.15, 4.16, 4.17, 4.18, 5.1
and 10.1 hereof with respect to the outstanding Notes and Note Guarantees on and
after the date the conditions set forth below are satisfied (hereinafter,
"Covenant Defeasance"), and the Notes and Note Guarantees shall thereafter be
deemed not "outstanding" for the purposes of any direction, waiver, consent or
declaration or act of Holders (and the consequences of any thereof) in
connection 



                                      -71-
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with such covenants, but shall continue to be deemed "outstanding" for all other
purposes hereunder (it being understood that such Notes and Note Guarantees
shall not be deemed outstanding for accounting purposes). For this purpose,
Covenant Defeasance means that, with respect to the outstanding Notes and Note
Guarantees, the Company or any of its Subsidiaries may omit to comply with and
shall have no liability in respect of any term, condition or limitation set
forth in any such covenant, whether directly or indirectly, by reason of any
reference elsewhere herein to any such covenant or by reason of any reference in
any such covenant to any other provision herein or in any other document and
such omission to comply shall not constitute a Default or an Event of Default
under Section 6.1 hereof, but, except as specified above, the remainder of this
Indenture and such Notes and Note Guarantees shall be unaffected thereby. In
addition, upon the Company's exercise under Section 8.1 hereof of the option
applicable to this Section 8.3, subject to the satisfaction of the conditions
set forth in Section 8.4 hereof, Sections 6.1(iii) through 6.1(v) hereof shall
not constitute Events of Default.

SECTION 8.4  CONDITIONS TO LEGAL OR COVENANT DEFEASANCE.

        The following shall be the conditions to the application of either
Section 8.2 or 8.3 hereof to the outstanding Notes and Note Guarantees:

        In order to exercise either Legal Defeasance or Covenant Defeasance:

        (a)    the Company must irrevocably deposit with the Trustee, in trust,
for the benefit of the Holders of the Notes, cash in U.S. dollars, non-callable
Government Securities, or a combination thereof, in such amounts as shall be
sufficient, in the opinion of a nationally recognized firm of independent public
accountants, to pay the principal of, premium and Liquidated Damages, if any,
and interest on the outstanding Notes on the stated maturity or on the
applicable redemption date, as the case may be, and the Company must specify
whether the Notes are being defeased to maturity or to a particular redemption
date;

        (b)    in the case of an election under Section 8.2 hereof, the Company
shall have delivered to the Trustee an opinion of counsel in the United States
reasonably acceptable to the Trustee confirming that (A) the Company has
received from, or there has been published by, the Internal Revenue Service a
ruling or (B) since the date hereof, there has been a change in the applicable
federal income tax law, in either case to the effect that, and based thereon
such opinion of counsel shall confirm that, the Holders of the outstanding Notes
shall not recognize income, gain or loss for federal income tax purposes as a
result of such Legal Defeasance and shall be subject to federal income tax on
the same amounts, in the same manner and at the same times as would have been
the case if such Legal Defeasance had not occurred;

        (c)    in the case of an election under Section 8.3 hereof, the Company
shall have delivered to the Trustee an opinion of counsel in the United States
reasonably acceptable to the Trustee confirming that the Holders of the
outstanding Notes shall not recognize income, gain or loss for federal income
tax purposes as a result of such Covenant Defeasance and shall be subject to
federal 



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income tax on the same amounts, in the same manner and at the same times as
would have been the case if such Covenant Defeasance had not occurred;

        (d)    no Default or Event of Default shall have occurred and be
continuing on the date of such deposit (other than a Default or Event of Default
resulting from the borrowing of funds to be applied to such deposit) or insofar
as Events of Default from bankruptcy or insolvency events are concerned, at any
time in the period ending on the 91st day after the date of deposit;

        (e)    such Legal Defeasance or Covenant Defeasance shall not result in
a breach or violation of, or constitute a default under any material agreement
or instrument (other than this Indenture) to which the Company or any of its
Subsidiaries is a party or by which the Company or any of its Subsidiaries is
bound;

        (f)    the Company shall have delivered to the Trustee an opinion of
counsel to the effect that after the 91st day following the deposit, the trust
funds shall not be subject to the effect of any applicable bankruptcy,
insolvency, reorganization or similar laws affecting creditors' rights
generally;

        (g)    the Company shall have delivered to the Trustee an Officers'
Certificate stating that the deposit was not made by the Company with the intent
of preferring the Holders of Notes over the other creditors of the Company with
the intent of defeating, hindering, delaying or defrauding creditors of the
Company or others; and

        (h)    the Company shall have delivered to the Trustee an Officers'
Certificate and an opinion of counsel, each stating that all conditions
precedent provided for relating to the Legal Defeasance or the Covenant
Defeasance have been complied with.

SECTION 8.5 DEPOSITED MONEY AND GOVERNMENT SECURITIES TO BE HELD IN TRUST; OTHER
MISCELLANEOUS PROVISIONS.

        Subject to Section 8.6 hereof, all money and non-callable Government
Securities (including the proceeds thereof) deposited with the Trustee (or other
qualifying trustee, collectively for purposes of this Section 8.5, the
"Trustee") pursuant to Section 8.4 hereof in respect of the outstanding Notes
shall be held in trust and applied by the Trustee, in accordance with the
provisions of such Notes and this Indenture, to the payment, either directly or
through any Paying Agent (including the Company acting as Paying Agent) as the
Trustee may determine, to the Holders of such Notes of all sums due and to
become due thereon in respect of principal, premium, if any, interest and
Liquidated Damages, if any, but such money need not be segregated from other
funds except to the extent required by law.

        The Company shall pay and indemnify the Trustee against any tax, fee or
other charge imposed on or assessed against the cash or non-callable Government
Securities deposited pursuant to 



                                      -73-
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Section 8.4 hereof or the principal and interest received in respect thereof
other than any such tax, fee or other charge which by law is for the account of
the Holders of the outstanding Notes.

        Anything in this Article 8 to the contrary notwithstanding, the Trustee
shall deliver or pay to the Company from time to time upon the written request
of the Company and be relieved of all liability with respect to any money or
non-callable Government Securities held by it as provided in Section 8.4 hereof
which, in the opinion of a nationally recognized firm of independent public
accountants expressed in a written certification thereof delivered to the
Trustee (which may be the opinion delivered under Section 8.4(a) hereof), are in
excess of the amount thereof that would then be required to be deposited to
effect an equivalent Legal Defeasance or Covenant Defeasance.

SECTION 8.6  REPAYMENT TO THE COMPANY.

        Any money deposited with the Trustee or any Paying Agent, or then held
by the Company, in trust for the payment of the principal of, premium, if any,
interest or Liquidated Damages, if any, on any Note and remaining unclaimed for
one year after such principal, and premium, if any, or interest or Liquidated
Damages, if any, has become due and payable shall be paid to the Company on its
written request or (if then held by the Company) shall be discharged from such
trust; and the Holder of such Note shall thereafter, as an unsecured general
creditor, look only to the Company for payment thereof, and all liability of the
Trustee or such Paying Agent with respect to such trust money, and all liability
of the Company as trustee thereof, shall thereupon cease; provided, however,
that the Trustee or such Paying Agent, before being required to make any such
repayment, may at the expense of the Company cause to be published once, in the
New York Times and The Wall Street Journal (national edition), notice that such
money remains unclaimed and that, after a date specified therein, which shall
not be less than 30 days from the date of such notification or publication, any
unclaimed balance of such money then remaining shall be repaid to the Company.

SECTION 8.7  REINSTATEMENT.

        If the Trustee or Paying Agent is unable to apply any United States
dollars or non-callable Government Securities in accordance with Section 8.2 or
8.3 hereof, as the case may be, by reason of any order or judgment of any court
or governmental authority enjoining, restraining or otherwise prohibiting such
application, then the obligations of the Company and the Subsidiary Guarantors
under this Indenture, the Notes and the Note Guarantees shall be revived and
reinstated as though no deposit had occurred pursuant to Section 8.2 or 8.3
hereof until such time as the Trustee or Paying Agent is permitted to apply all
such money in accordance with Section 8.2 or 8.3 hereof, as the case may be;
provided, however, that, if the Company makes any payment of principal of,
premium, if any, interest or Liquidated Damages, if any, on any Note following
the reinstatement of its obligations, the Company shall be subrogated to the
rights of the Holders of such Notes to receive such payment from the money held
by the Trustee or Paying Agent.


                                    ARTICLE 9



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                        AMENDMENT, SUPPLEMENT AND WAIVER

SECTION 9.1  WITHOUT CONSENT OF HOLDERS OF THE NOTES.

        Notwithstanding Section 9.2 of this Indenture, without the consent of
any Holder of Notes the Company and the Trustee may amend or supplement this
Indenture, the Notes or the Note Guarantees:

        (a) to cure any ambiguity, defect or inconsistency;

        (b) to provide for uncertificated Notes in addition to or in place of
certificated Notes;

        (c) to provide for the assumption of the Company's or a Subsidiary
Guarantor's obligations to the Holders of the Notes in the case of a merger, or
consolidation pursuant to Article 5 or Article 10 hereof, as applicable;

        (d) to make any change that would provide any additional rights or
benefits to the Holders of the Notes or that does not adversely affect the legal
rights hereunder of any Holder of the Notes;

        (e) to comply with requirements of the Commission in order to effect or
maintain the qualification of this Indenture under the TIA; or

        (f) to allow any Subsidiary to Guarantee the Notes.

        Upon the written request of the Company accompanied by a resolution of
its Board of Directors of the Company authorizing the execution of any such
amended or supplemental indenture, and upon receipt by the Trustee of the
documents described in Section 9.6 hereof, the Trustee shall join with the
Company and the Subsidiary Guarantors in the execution of any amended or
supplemental indenture authorized or permitted by the terms of this Indenture
and to make any further appropriate agreements and stipulations that may be
therein contained, but the Trustee shall not be obligated to enter into such
amended or supplemental indenture that affects its own rights, duties or
immunities under this Indenture or otherwise.

SECTION 9.2  WITH CONSENT OF HOLDERS OF NOTES.

        Except as provided below in this Section 9.2, this Indenture, the Notes
or the Note Guarantees may be amended or supplemented with the consent of the
Holders of at least a majority in principal amount of the Notes then outstanding
(including, without limitation, consents obtained in connection with a purchase
of, or tender offer or exchange offer, for Notes), and, any existing default or
compliance with any provision of this Indenture, the Notes or the Note
Guarantees may be waived with the consent of the Holders of a majority in
principal amount of the then outstanding 



                                      -75-
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Notes (including consents obtained in connection with or a tender offer or
exchange offer for the Notes).

        Upon the request of the Company accompanied by a resolution of its Board
of Directors authorizing the execution of any such amended or supplemental
indenture, and upon the filing with the Trustee of evidence satisfactory to the
Trustee of the consent of the Holders of Notes as aforesaid, and upon receipt by
the Trustee of the documents described in Section 9.6 hereof, the Trustee shall
join with the Company and the Subsidiary Guarantors in the execution of such
amended or supplemental indenture unless such amended or supplemental indenture
affects the Trustee's own rights, duties or immunities under this Indenture or
otherwise, in which case the Trustee may, but shall not be obligated to, enter
into such amended or supplemental indenture.

        It shall not be necessary for the consent of the Holders of Notes under
this Section 9.2 to approve the particular form of any proposed amendment or
waiver, but it shall be sufficient if such consent approves the substance
thereof. After an amendment, supplement or waiver under this Section 9.2 becomes
effective, the Company shall mail to the Holders of each Note affected thereby a
notice briefly describing the amendment, supplement or waiver. Any failure of
the Company to mail such notice, or any defect therein, shall not, however, in
any way impair or affect the validity of any such amended or supplemental
indenture or waiver.

        Subject to Sections 6.2, 6.4 and 6.7, hereof, the Holders of a majority
in aggregate principal amount of the Notes then outstanding may amend or waive
compliance in a particular instance by the Company or the Subsidiary Guarantors
with any provision of this Indenture, the Notes or the Note Guarantees. However,
without the consent of each Holder affected, an amendment, or waiver may not
(with respect to any Note held by a non-consenting Holder):

        (a) reduce the principal amount of Notes whose Holders must consent to
an amendment, supplement or waiver;

        (b) reduce the principal of or change the fixed maturity of any Note or
alter the provisions with respect to the redemption of the Notes (other than
provisions relating to Sections 3.9, 4.10 and 4.13 hereof);

        (c) reduce the rate of or change the time for payment of interest on any
Note;

        (d) waive a Default or Event of Default in the payment of principal of
or premium, if any, or interest on the Notes (except a rescission of
acceleration of the Notes by the Holders of at least a majority in aggregate
principal amount of the Notes and a waiver of the payment default that resulted
from such acceleration);

        (e) make any Note payable in money other than that stated in the Notes;

        (f)    make any change in Section 6.4 or 6.7 hereof;



                                      -76-
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        (g)    waive a redemption or repurchase payment with respect to any Note
(other than a payment required by Section 4.10 or 4.13 hereof); or

        (h) make any change in the amendment and waiver provisions of this
Article 9.

SECTION 9.3  COMPLIANCE WITH TRUST INDENTURE ACT.

        Every amendment or supplement to this Indenture, the Note Guarantees or
the Notes shall be set forth in an amended or supplemental indenture that
complies with the TIA as then in effect.

SECTION 9.4  REVOCATION AND EFFECT OF CONSENTS.

        Until an amendment, supplement or waiver becomes effective, a consent to
it by a Holder of a Note is a continuing consent by the Holder and every
subsequent Holder of a Note or portion of a Note that evidences the same debt as
the consenting Holder's Note, even if notation of the consent is not made on any
Note. However, any such Holder or subsequent Holder of a Note may revoke the
consent as to its Note if the Trustee receives written notice of revocation
before the date the waiver, supplement or amendment becomes effective. When an
amendment, supplement or waiver becomes effective in accordance with its terms,
it thereafter binds every Holder.

        The Company may, but shall not be obligated to, fix a record date for
determining which Holders of the Notes must consent to such amendment,
supplement or waiver. If the Company fixes a record date, the record date shall
be fixed at (i) the later of 30 days prior to the first solicitation of such
consent or the date of the most recent list of Holders of Notes furnished for
the Trustee prior to such solicitation pursuant to Section 2.5 hereof or (ii)
such other date as the Company shall designate.

SECTION 9.5  NOTATION ON OR EXCHANGE OF NOTES.

        The Trustee may place an appropriate notation about an amendment,
supplement or waiver on any Note thereafter authenticated. The Company in
exchange for all Notes may issue and the Trustee shall authenticate new Notes
that reflect the amendment, supplement or waiver.

        Failure to make the appropriate notation or issue a new Note shall not
affect the validity and effect of such amendment, supplement or waiver.

SECTION 9.6  TRUSTEE TO SIGN AMENDMENTS, ETC.

        The Trustee shall sign any amended or supplemental indenture authorized
pursuant to this Article 9 if the amendment or supplement does not adversely
affect the rights, duties, liabilities or immunities of the Trustee. The Company
and the Subsidiary Guarantors may not sign an amendment or supplemental
indenture until their respective Boards of Directors approve it. In 



                                      -77-
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signing or refusing to sign any amended or supplemental indenture the Trustee
shall be entitled to receive and (subject to Section 7.1 hereof) shall be fully
protected in relying upon, in addition to the documents required by Section 10.4
hereof, an Officers' Certificate and an Opinion of Counsel stating that the
execution of such amended or supplemental indenture is authorized or permitted
by this Indenture, that it is not inconsistent herewith, and that it will be
valid and binding upon the Company and the Subsidiary Guarantors in accordance
with its terms.


                                   ARTICLE 10

                               GUARANTEE OF NOTES

SECTION 10.1  NOTE GUARANTEE.

        Subject to Section 10.6 hereof, each of the Subsidiary Guarantors
hereby, jointly and severally, unconditionally guarantees to each Holder of a
Note authenticated and delivered by the Trustee and to the Trustee and its
successors and assigns, irrespective of the validity and enforceability of this
Indenture, the Notes and the Obligations of the Company hereunder and
thereunder, that: (a) the principal of, premium, if any, interest and Liquidated
Damages, if any, on the Notes will be promptly paid in full when due, subject to
any applicable grace period, whether at maturity, by acceleration, redemption or
otherwise, and interest on the overdue principal, premium, if any, (to the
extent permitted by law) interest on any interest, if any, and Liquidated
Damages, if any, on the Notes, and all other payment Obligations of the Company
to the Holders or the Trustee hereunder or thereunder will be promptly paid in
full and performed, all in accordance with the terms hereof and thereof; and (b)
in case of any extension of time of payment or renewal of any Notes or any of
such other Obligations, the same will be promptly paid in full when due or
performed in accordance with the terms of the extension or renewal, subject to
any applicable grace period, whether at stated maturity, by acceleration,
redemption or otherwise. Failing payment when so due of any amount so guaranteed
for whatever reason the Subsidiary Guarantors will be jointly and severally
obligated to pay the same immediately. An Event of Default under this Indenture
or the Notes shall constitute an event of default under the Note Guarantees, and
shall entitle the Holders to accelerate the Obligations of the Subsidiary
Guarantors hereunder in the same manner and to the same extent as the
Obligations of the Company. The Subsidiary Guarantors hereby agree that their
Obligations hereunder shall be unconditional, irrespective of the validity,
regularity or enforceability of the Notes or this Indenture, the absence of any
action to enforce the same, any waiver or consent by any Holder with respect to
any provisions hereof or thereof, the recovery of any judgment against the
Company, any action to enforce the same or any other circumstance which might
otherwise constitute a legal or equitable discharge or defense of a Subsidiary
Guarantor. Each Subsidiary Guarantor hereby waives diligence, presentment,
demand of payment, filing of claims with a court in the event of insolvency or
bankruptcy of the Company, any right to require a proceeding first against the
Company, protest, notice and all demands whatsoever and covenants that this Note
Guarantee will not be discharged except by complete performance of the
Obligations contained in the Notes and this Indenture. If any Holder or the
Trustee is required by any court or otherwise to return to the 



                                      -78-
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Company, the Subsidiary Guarantors, or any Note Custodian, Trustee, liquidator
or other similar official acting in relation to either the Company or the
Subsidiary Guarantors, any amount paid by either to the Trustee or such Holder,
this Note Guarantee, to the extent theretofore discharged, shall be reinstated
in full force and effect. Each Subsidiary Guarantor agrees that it shall not be
entitled to, and hereby waives, any right of subrogation in relation to the
Holders in respect of any Obligations guaranteed hereby. Each Subsidiary
Guarantor further agrees that, as between the Subsidiary Guarantors, on the one
hand, and the Holders and the Trustee, on the other hand, (x) the maturity of
the Obligations guaranteed hereby may be accelerated as provided in Article 6
for the purposes of this Note Guarantee, notwithstanding any stay, injunction or
other prohibition preventing such acceleration in respect of the Obligations
guaranteed hereby, and (y) in the event of any declaration of acceleration of
such Obligations as provided in Article 6 hereof, such Obligations (whether or
not due and payable) shall forthwith become due and payable by the Subsidiary
Guarantors for the purpose of this Note Guarantee. The Subsidiary Guarantors
shall have the right to seek contribution from any non-paying Subsidiary
Guarantor so long as the exercise of such right does not impair the rights of
the Holders under the Note Guarantees.

SECTION 10.2  EXECUTION AND DELIVERY OF NOTE GUARANTEE.

        To evidence its Note Guarantee set forth in Section 10.1, each
Subsidiary Guarantor hereby agrees that a notation of such Note Guarantee
substantially in the form of EXHIBIT E shall be endorsed by an Officer of such
Subsidiary Guarantor on each Note authenticated and delivered by the Trustee and
that this Indenture shall be executed on behalf of such Subsidiary Guarantor, by
manual or facsimile signature, by an Officer of such Subsidiary Guarantor.

        Each Subsidiary Guarantor hereby agrees that its Note Guarantee set
forth in Section 10.1 shall remain in full force and effect notwithstanding any
failure to endorse on each Note a notation of such Note Guarantee.

        If an Officer whose signature is on this Indenture or on the Note
Guarantee no longer holds that office at the time the Trustee authenticates the
Note on which a Note Guarantee is endorsed, the Note Guarantee shall be valid
nevertheless.

        The delivery of any Note by the Trustee, after the authentication
thereof hereunder, shall constitute due delivery of the Note Guarantee set forth
in this Indenture on behalf of the Subsidiary Guarantors.

SECTION 10.3  SUBSIDIARY GUARANTORS MAY CONSOLIDATE, ETC., ON CERTAIN
                  TERMS

        (a)    Except as set forth in Articles 4 and 5 hereof, nothing contained
in this Indenture shall prohibit a merger between a Subsidiary Guarantor and
another Subsidiary Guarantor or a merger between a Subsidiary Guarantor and the
Company.



                                      -79-
   87

        (b)    Subject to Section 10.4 hereof, no Subsidiary Guarantor may
consolidate with or merge with or into (whether or not such Subsidiary Guarantor
is the surviving Person), another corporation, Person or entity whether or not
affiliated with such Subsidiary Guarantor unless, subject to the provisions of
the following paragraph, (i) the Person formed by or surviving any such
consolidation or merger (if other than such Subsidiary Guarantor) assumes all
the obligations of such Subsidiary Guarantor pursuant to a supplemental
indenture in form and substance reasonably satisfactory to the Trustee, under
the Notes and this Indenture; (ii) immediately after giving effect to such
transaction, no Default or Event of Default exists; (iii) such Subsidiary
Guarantor, or any Person formed by or surviving any such consolidation or
merger, would have Consolidated Net Worth (immediately after giving effect to
such transaction), equal to or greater than the Consolidated Net Worth of such
Subsidiary Guarantor immediately preceding the transaction; and (iv) the Company
would be permitted by virtue of its pro forma Fixed Charge Coverage Ratio,
immediately after giving effect to such transaction, to incur at least $1.00 of
additional Indebtedness pursuant to the Fixed Charge Coverage Ratio test set
forth in the first paragraph of Section 4.9. The requirements of clauses (i),
(iii) and (iv) of this paragraph will not apply in the case of a consolidation
with or merger with or into the Company or another Subsidiary Guarantor.

        (c)    In the case of any such consolidation, merger, sale or conveyance
and upon the assumption by the successor Person, by supplemental indenture,
executed and delivered to the Trustee and substantially in the form of EXHIBIT E
hereto, of the Note Guarantee endorsed upon the Notes and the due and punctual
performance of all of the covenants and conditions of this Indenture to be
performed by the Subsidiary Guarantor, such successor Person shall succeed to
and be substituted for the Subsidiary Guarantor with the same effect as if it
had been named herein as a Subsidiary Guarantor; provided that, solely for
purposes of computing Consolidated Net Income for purposes of clause (b) of the
first paragraph of Section 4.7 hereof, the Consolidated Net Income of any Person
other than the Company and its Restricted Subsidiaries shall only be included
for periods subsequent to the effective time of such merger, consolidation,
combination or transfer of assets. Such successor Person thereupon may cause to
be signed any or all of the Note Guarantees to be endorsed upon all of the Notes
issuable hereunder which theretofore shall not have been signed by the Company
and delivered to the Trustee. All of the Note Guarantees so issued shall in all
respects have the same legal rank and benefit under this Indenture as the Note
Guarantees theretofore and thereafter issued in accordance with the terms of
this Indenture as though all of such Note Guarantees had been issued at the date
of the execution hereof.

SECTION 10.4  RELEASES FOLLOWING SALE OF ASSETS, MERGER, SALE OF CAPITAL
                  STOCK ETC.

        In the event (a) of a sale or other disposition of all of the assets of
any Subsidiary Guarantor, by way of merger, consolidation or otherwise, or a
sale or other disposition of all of the capital stock of any Subsidiary
Guarantor, or (b) that the Company designates a Subsidiary Guarantor to be an
Unrestricted Subsidiary, or such Subsidiary Guarantor ceases to be a Subsidiary
of the Company, then such Subsidiary Guarantor (in the event of a sale or other
disposition, by way of such a merger, consolidation or otherwise, of all of the
capital stock of such Subsidiary Guarantor or any such 



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designation) or the entity acquiring the property (in the event of a sale or
other disposition of all of the assets of such Subsidiary Guarantor) shall be
released and relieved of any obligations under its Note Guarantee; provided that
the Net Proceeds of such sale or other disposition are applied in accordance
with the provisions of Section 4.10 and, if applicable, Section 4.13 hereof. In
the case of a sale, assignment, lease, transfer, conveyance or other disposition
of all or substantially all of the assets of a Subsidiary Guarantor, upon the
assumption provided for in clause (i) of the Section 10.3(b) hereof, such
Subsidiary Guarantor shall be discharged from all further liability and
obligation under this Indenture. Upon delivery by the Company to the Trustee of
an Officers' Certificate to the effect of the foregoing, the Trustee shall
execute any documents reasonably required in order to evidence the release of
any Subsidiary Guarantor from its Obligation under its Note Guarantee. Any
Subsidiary Guarantor not released from its Obligations under its Note Guarantee
shall remain liable for the full amount of principal of, premium, if any,
interest and Liquidated Damages, if any, on the Notes and for the other
Obligations of such Subsidiary Guarantor under this Indenture as provided in
this Article 10.

SECTION 10.5  ADDITIONAL SUBSIDIARY GUARANTORS.

        Any Person that was not a Subsidiary Guarantor on the date of this
Indenture may become a Subsidiary Guarantor by executing and delivering to the
Trustee (a) a supplemental indenture in substantially the form of EXHIBIT E, and
(b) an Opinion of Counsel to the effect that such supplemental indenture has
been duly authorized and executed by such Person and constitutes the legal,
valid, binding and enforceable obligation of such Person (subject to such
customary exceptions concerning creditors rights', fraudulent transfers, public
policy and equitable principles as may be acceptable to the Trustee in its
discretion).

SECTION 10.6  LIMITATION ON SUBSIDIARY GUARANTOR LIABILITY.

        For purposes hereof, each Subsidiary Guarantor's liability shall be
limited to the lesser of (i) the aggregate amount of the Obligations of the
Company under the Notes and this Indenture and (ii) the amount, if any, which
would not have (A) rendered such Subsidiary Guarantor "insolvent" (as such term
is defined in the United States Bankruptcy Code and in the Debtor and Creditor
Law of the State of New York) or (B) left such Subsidiary Guarantor with
unreasonably small capital at the time its Note Guarantee of the Notes was
entered into; provided that, it will be a presumption in any lawsuit or other
proceeding in which a Subsidiary Guarantor is a party that the amount guaranteed
pursuant to the Note Guarantee is the amount set forth in clause (i) above
unless any creditor, or representative of creditors of such Subsidiary
Guarantor, or debtor in possession or trustee in bankruptcy of the Subsidiary
Guarantor, otherwise proves in such a lawsuit that the aggregate liability of
the Subsidiary Guarantor is the amount set forth in clause (ii) above. In making
any determination as to solvency or sufficiency of capital of a Subsidiary
Guarantor in accordance with the previous sentence, the right of such Subsidiary
Guarantor to contribution from other Subsidiary Guarantors, and any other rights
such Subsidiary Guarantor may have, contractual or otherwise, shall be taken
into account.



                                      -81-
   89

SECTION 10.7  "TRUSTEE" TO INCLUDE PAYING AGENT.

        In case at any time any Paying Agent other than the Trustee shall have
been appointed by the Company and be then acting hereunder, the term "Trustee"
as used in this Article 10 shall in each case (unless the context shall
otherwise require) be construed as extending to and including such Paying Agent
within its meaning as fully and for all intents and purposes as if such Paying
Agent were named in this Article 10 in place of the Trustee.


                                   ARTICLE 11

                                  MISCELLANEOUS

SECTION 11.1  TRUST INDENTURE ACT CONTROLS.

        If any provision of this Indenture limits, qualifies or conflicts with
the duties imposed by TIA Section 318(c), the imposed duties shall control.

SECTION 11.2  NOTICES.

        Any notice or communication by the Company, the Subsidiary Guarantors or
the Trustee to the others is duly given if in writing and delivered in Person or
mailed by first class mail (registered or certified, return receipt requested),
telecopier or overnight air courier guaranteeing next day delivery, to the
others' address:

        If to the Company or the Subsidiary Guarantors:

        Phase Metrics, Inc.
        10260 Sorrento Valley Road
        San Diego, California 92121

        Telecopier No.:  (619) 646-4990
        Attention:  Chief Financial Officer

        With a copy to:

        Brobeck, Phleger & Harrison, LLP
        4675 MacArthur Court, Suite 1000
        Newport Beach, California 92660
        Telecopier No.:  (714) 752-7522
        Attention: Greg T. Williams, Esq.

        If to the Trustee:



                                      -82-
   90

        State Street Bank and Trust Company of California, N.A.
        725 South Figueroa Street, Suite 3100
        Los Angeles, CA 90017
        Telecopier No.:  (213) 362-7357
        Attention:    Corporate Trust Department
                      (Phase Metrics, Inc. 10-3/4% Senior Notes due 2005)

        The Company, the Subsidiary Guarantors or the Trustee, by notice to the
others may designate additional or different addresses for subsequent notices or
communications.

        All notices and communications (other than those sent to Holders) shall
be deemed to have been duly given: at the time delivered by hand, if personally
delivered; five Business Days after being deposited in the mail, postage
prepaid, if mailed; when receipt acknowledged, if telecopied; and the next
Business Day after timely delivery to the courier, if sent by overnight air
courier promising next Business Day delivery.

        Any notice or communication to a Holder shall be mailed by first class
mail or by overnight air courier promising next Business Day delivery to its
address shown on the register kept by the Registrar. Any notice or communication
shall also be so mailed to any Person described in TIA Section 313(c), to the
extent required by the TIA. Failure to mail a notice or communication to a
Holder or any defect in it shall not affect its sufficiency with respect to
other Holders.

        If a notice or communication is mailed in the manner provided above
within the time prescribed, it is duly given, whether or not the addressee
receives it.

        If the Company mails a notice or communication to Holders, it shall mail
a copy to the Trustee and each Agent at the same time.

SECTION 11.3  COMMUNICATION BY HOLDERS OF NOTES WITH OTHER HOLDERS OF
              NOTES.

        Holders may communicate pursuant to TIA Section 312(b) with other
Holders with respect to their rights under this Indenture or the Notes. The
Company, the Trustee, the Registrar and anyone else shall have the protection of
TIA Section 312(c).

SECTION 11.4  CERTIFICATE AND OPINION AS TO CONDITIONS PRECEDENT.

        Upon any request or application by the Company or the Subsidiary
Guarantors to the Trustee to take any action under this Indenture (other than
the initial issuance of the Senior Notes), the Company or Subsidiary Guarantor
shall furnish to the Trustee upon request:



                                      -83-
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        (a)    an Officers' Certificate in form and substance reasonably
satisfactory to the Trustee (which shall include the statements set forth in
Section 11.5 hereof) stating that, in the opinion of the signers, all conditions
precedent and covenants, if any, provided for in this Indenture relating to the
proposed action have been satisfied; and

        (b)    an Opinion of Counsel in form and substance reasonably
satisfactory to the Trustee (which shall include the statements set forth in
Section 11.5 hereof) stating that, in the opinion of such counsel, all such
conditions precedent and covenants have been satisfied.

SECTION 11.5  STATEMENTS REQUIRED IN CERTIFICATE OR OPINION.

        Each certificate or opinion with respect to compliance with a condition
or covenant provided for in this Indenture (other than a certificate provided
pursuant to TIA Section 314(a)(4)) shall comply with the provisions of TIA
Section 314(e) and shall include:

        (a)    a statement that the Person making such certificate or opinion 
has read such covenant or condition;

        (b)    a brief statement as to the nature and scope of the examination
or investigation upon which the statements or opinions contained in such
certificate or opinion are based;

        (c)    a statement that, in the opinion of such Person, he or she has
made such examination or investigation as is necessary to enable him to express
an informed opinion as to whether or not such covenant or condition has been
satisfied; and

        (d)    a statement as to whether or not, in the opinion of such Person,
such condition or covenant has been satisfied.

SECTION 11.6  RULES BY TRUSTEE AND AGENTS.

        The Trustee may make reasonable rules for action by or at a meeting of
Holders. The Registrar or Paying Agent may make reasonable rules and set
reasonable requirements for its functions.

SECTION 11.7  NO PERSONAL LIABILITY OF DIRECTORS, OFFICERS, EMPLOYEES AND
                  STOCKHOLDERS.

        No director, officer, employee, incorporator or stockholder of the
Company or the Subsidiary Guarantors, as such, shall have any liability for any
obligations of the Company or any Subsidiary Guarantor under the Notes, this
Indenture, the Note Guarantees or for any claim based on, in respect of, or by
reason of, such obligations or their creation. Each Holder of Notes by accepting
a Note waives and releases all such liability. The waiver and release are part
of the consideration for issuance of the Notes.



                                      -84-
   92

SECTION 11.8  GOVERNING LAW.

        THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO
CONSTRUE THIS INDENTURE, THE NOTES AND THE NOTE GUARANTEES.

SECTION 11.9  NO ADVERSE INTERPRETATION OF OTHER AGREEMENTS.

        This Indenture may not be used to interpret any other indenture, loan or
debt agreement of the Company or its Subsidiaries or of any other Person. Any
such indenture, loan or debt agreement may not be used to interpret this
Indenture.

SECTION 11.10  SUCCESSORS.

        All agreements of the Company and the Subsidiary Guarantors in this
Indenture, the Notes and the Note Guarantees shall bind their respective
successors and assigns. All agreements of the Trustee in this Indenture shall
bind its successors and assigns.

SECTION 11.11  SEVERABILITY.

        In case any provision in this Indenture or in the Notes shall be
invalid, illegal or unenforceable, the validity, legality and enforceability of
the remaining provisions shall not in any way be affected or impaired thereby.

SECTION 11.12  COUNTERPART ORIGINALS.

        The parties may sign any number of copies of this Indenture. Each signed
copy shall be an original, but all of them together represent the same
agreement.

SECTION 11.13  TABLE OF CONTENTS, HEADINGS, ETC.

        The Table of Contents, Cross-Reference Table and Headings of the
Articles and Sections of this Indenture have been inserted for convenience of
reference only, are not to be considered a part of this Indenture and shall in
no way modify or restrict any of the terms or provisions hereof.

                         [Signatures on following page]


                                      -85-
   93

                                   SIGNATURES


Dated as of  January 30, 1998          PHASE METRICS, INC.


                                       By: /s/ R. Joseph Saunders
                                          --------------------------------------
                                       Name:  R. Joseph Saunders
                                            ------------------------------------
                                       Title:  Chief Financial Officer
                                             -----------------------------------


                                       HELIOS, INCORPORATED


                                       By: /s/ R. Joseph Saunders
                                           -------------------------------------
                                       Name: R. Joseph Saunders
                                             -----------------------------------
                                       Title: Vice President
                                              ----------------------------------


                                       APPLIED ROBOTIC TECHNOLOGIES, INC.


                                       By: /s/ R. Joseph Saunders
                                           -------------------------------------
                                       Name: R. Joseph Saunders
                                             -----------------------------------
                                       Title: Vice President
                                              ----------------------------------


                                       AIR BEARINGS, INCORPORATED


                                       By: /s/ R. Joseph Saunders
                                           -------------------------------------
                                       Name: R. Joseph Saunders
                                             -----------------------------------
                                       Title: Vice President
                                              ----------------------------------


                                       SANTA BARBARA METRIC, INC.


                                       By: /s/ R. Joseph Saunders
                                           -------------------------------------
                                       Name: R. Joseph Saunders
                                             -----------------------------------
                                       Title: Vice President
                                              ----------------------------------


   94

                                       STATE STREET BANK AND TRUST COMPANY OF
                                       CALIFORNIA, N.A.,
                                        as Trustee


                                       By: /s/ Jeanne Mar
                                           -------------------------------------
                                       Name: Jeanne Mar
                                             -----------------------------------
                                       Title: Assistant Vice President
                                              ----------------------------------


   95

                                   EXHIBIT A-1

              (Face of Senior Note) 10-3/4% Senior Notes due 2005

No.___                                    $_______________ CUSIP NO. 717217 AA 1


        Phase Metrics, Inc. promises to pay to _________________ or registered 
assigns, the principal sum of ___________ Dollars on February 1, 2005.


        Interest Payment Dates: February 1 and August 1

        Record Dates: January 15 and July 15


                                        PHASE METRICS, INC.


                                        By:
                                           -------------------------------------
                                        Name:  R. Joseph Saunders
                                        Title: Chief Financial Officer



This is one of the 
Senior Notes referred to in the 
within-mentioned Indenture:


Dated:___________, ____

STATE STREET BANK AND TRUST COMPANY
OF CALIFORNIA, N.A.,
as Trustee


By:
   -------------------------------------
        Authorized Signatory


   96

              (Back of Senior Note) 10-3/4% Senior Notes due 2005

        [UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR NOTES IN
DEFINITIVE FORM, THIS NOTE MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE
DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO
THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE DEPOSITARY OR ANY
SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR
DEPOSITARY. UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE
OF THE DEPOSITORY TRUST COMPANY (55 WATER STREET, NEW YORK, NEW YORK) ("DTC"),
TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT,
AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER
NAME AS MAY BE REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT
IS MADE TO CEDE & CO. OR SUCH OTHER ENTITY AS MAY BE REQUESTED BY AN AUTHORIZED
REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL IN AS MUCH AS THE REGISTERED OWNER
HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.](1)



- ---------------

        (1) This paragraph should be included only if the Senior Note is issued 
in global form.


                                      A-1-2
   97

        [THIS NOTE (OR ITS PREDECESSOR) HAS NOT BEEN REGISTERED UNDER THE U.S.
SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND, ACCORDINGLY, MAY
NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED WITHIN THE UNITED STATES
OR TO, OR FOR THE ACCOUNT OR BENEFIT OF, U.S. PERSONS, EXCEPT AS SET FORTH IN
THE SECOND SENTENCE HEREOF. BY ITS ACQUISITION HEREOF OR OF A BENEFICIAL
INTEREST HEREIN, THE HOLDER (1) REPRESENTS THAT (A) IT IS A "QUALIFIED
INSTITUTIONAL BUYER" (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) (A
"QIB"), (B) IT IS ACQUIRING THIS NOTE IN AN OFFSHORE TRANSACTION IN COMPLIANCE
WITH REGULATION S UNDER THE SECURITIES ACT OR (C) IT IS AN INSTITUTIONAL
"ACCREDITED INVESTOR" (AS DEFINED IN RULE 501(A) (1), (2), (3) OR (7) OF
REGULATION D UNDER THE SECURITIES ACT (AN "IAI"), (2) AGREES THAT IT WILL NOT,
RESELL OR OTHERWISE TRANSFER THIS NOTE EXCEPT (A) TO THE COMPANY OR ANY OF ITS
SUBSIDIARIES, (B) TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A QIB
PURCHASING FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF A QIB IN A TRANSACTION
MEETING THE REQUIREMENTS OF RULE 144A, (C) IN AN OFFSHORE TRANSACTION MEETING
THE REQUIREMENTS OF RULE 903 OR 904 OF THE SECURITIES ACT, (D) IN A TRANSACTION
MEETING THE REQUIREMENTS OF RULE 144 UNDER THE SECURITIES ACT, (E) TO AN IAI
THAT, PRIOR TO SUCH TRANSFER, FURNISHES THE TRUSTEE A SIGNED LETTER CONTAINING
CERTAIN REPRESENTATIONS AND AGREEMENTS RELATING TO THE TRANSFER OF THIS NOTE
(THE FORM OF WHICH CAN BE OBTAINED FROM THE TRUSTEE) AND, IF SUCH TRANSFER IS IN
RESPECT OF AN AGGREGATE PRINCIPAL AMOUNT OF NOTES LESS THAN $250,000, AN OPINION
OF COUNSEL ACCEPTABLE TO THE COMPANY THAT SUCH TRANSFER IS IN COMPLIANCE WITH
THE SECURITIES ACT, (F) IN ACCORDANCE WITH ANOTHER EXEMPTION FROM THE
REGISTRATION REQUIREMENTS OF THE SECURITIES ACT (AND BASED UPON AN OPINION OF
COUNSEL ACCEPTABLE TO THE COMPANY) OR (G) PURSUANT TO AN EFFECTIVE REGISTRATION
STATEMENT AND, IN EACH CASE, IN ACCORDANCE WITH THE APPLICABLE SECURITIES LAWS
OF ANY STATE OF THE UNITED STATES OR ANY OTHER APPLICABLE JURISDICTION AND (3)
AGREES THAT IT WILL DELIVER TO EACH PERSON TO WHOM THIS NOTE OR AN INTEREST
HEREIN IS TRANSFERRED A NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND. AS
USED HEREIN, THE TERMS "OFFSHORE TRANSACTION" AND "UNITED STATES" HAVE THE
MEANINGS GIVEN TO THEM BY RULE 902 OF REGULATION S UNDER THE SECURITIES ACT. THE
INDENTURE CONTAINS A PROVISION REQUIRING THE TRUSTEE TO REFUSE TO REGISTER ANY
TRANSFER OF THIS NOTE IN VIOLATION OF THE FOREGOING.](2)

        Capitalized terms used herein shall have the meanings assigned to them
in the Indenture referred to below unless otherwise indicated.

        1. INTEREST. Phase Metrics, Inc., a Delaware corporation, or its
successor (the "Company"), promises to pay interest on the principal amount of
this Senior Note at the rate of 


- ----------------

        (2) This paragraph should be removed upon the exchange of Senior Notes 
for New Senior Notes in the Exchange Offer or upon the registration of the 
Senior Notes pursuant to the terms of the Registration Rights Agreement.


                                      A-1-3
   98

10-3/4% per annum and shall pay the Liquidated Damages, if any, payable
pursuant to Section 5 of the Registration Rights Agreement referred to below.
The Company will pay interest and Liquidated Damages, if any, in United States
dollars (except as otherwise provided herein) semi-annually in arrears on
February 1 and August 1, commencing on August 1, 1998, or if any such day is not
a Business Day, on the next succeeding Business Day (each an "Interest Payment
Date"). Interest on the Senior Notes shall accrue from the most recent date to
which interest has been paid or, if no interest has been paid, from the date of
issuance; provided that if there is no existing Default or Event of Default in
the payment of interest, and if this Senior Note is authenticated between a
record date referred to on the face hereof and the next succeeding Interest
Payment Date, interest shall accrue from such next succeeding Interest Payment
Date, except in the case of the original issuance of Senior Notes, in which case
interest shall accrue from the date of authentication. The Company shall pay
interest (including post-petition interest in any proceeding under any
Bankruptcy Law) on overdue principal at the rate equal to 1% per annum in excess
of the then applicable interest rate on the Senior Notes to the extent lawful;
it shall pay interest (including post-petition interest in any proceeding under
any Bankruptcy Law) on overdue installments of interest and Liquidated Damages
(without regard to any applicable grace period) at the same rate to the extent
lawful. Interest shall be computed on the basis of a 360-day year comprised of
twelve 30-day months.

        2. METHOD OF PAYMENT. The Company will pay interest on the Senior Notes
(except defaulted interest) and Liquidated Damages, if any, on the applicable
Interest Payment Date to the Persons who are registered Holders of Senior Notes
at the close of business on the January 15 or July 15 next preceding the
Interest Payment Date, even if such Senior Notes are canceled after such record
date and on or before such Interest Payment Date, except as provided in Section
2.12 of the Indenture with respect to defaulted interest. The Senior Notes shall
be payable as to principal, premium and Liquidated Damages, if any, and interest
at the office or agency of the Company maintained for such purpose within or
without the City and State of New York, or, at the option of the Company,
payment of interest and Liquidated Damages, if any, may be made by check mailed
to the Holders at their addresses set forth in the register of Holders; provided
that payment by wire transfer of immediately available funds shall be required
with respect to principal of, premium and Liquidated Damages, if any, and
interest on, all Global Notes and all other Senior Notes the Holders of which
shall have provided written wire transfer instructions to the Company and the
Paying Agent. Such payment shall be in such coin or currency of the United
States of America as at the time of payment is legal tender for payment of
public and private debts.

        3. PAYING AGENT AND REGISTRAR. Initially, State Street Bank and Trust
Company of California, N.A., the Trustee under the Indenture, shall act as
Paying Agent and Registrar. The Company may change any Paying Agent or Registrar
without notice to any Holder. The Company or any of its Subsidiaries may act in
any such capacity.

        4. INDENTURE. The Company issued the Senior Notes under an Indenture
dated as of January 30, 1998 ("Indenture") among the Company, the Subsidiary
Guarantors and the Trustee. The terms of the Senior Notes include those stated
in the Indenture and those made a part of the Indenture by reference to the
Trust Indenture Act of 1939, as amended (15 U.S. Code Sections 



                                      A-1-4
   99

77aaa-77bbbb) (the "TIA"). The Senior Notes are subject to all such terms, and
Holders are referred to the Indenture and such Act for a statement of such
terms. The Senior Notes are general unsecured Obligations of the Company limited
to $110,000,000 in aggregate principal amount, plus amounts, if any, sufficient
to pay premium or Liquidated Damages, if any, and interest on outstanding Senior
Notes as set forth in Paragraph 2 hereof.

        5. OPTIONAL REDEMPTION. Except as set forth in the next paragraph, the
Senior Notes shall not be redeemable at the Company's option prior to February
1, 2002. Thereafter, the Senior Notes shall be subject to redemption at the
option of the Company, in whole or in part, upon not less than 30 nor more than
60 days' notice, at the redemption prices (expressed as percentages of principal
amount) set forth below together with accrued and unpaid interest and any
Liquidated Damages, if any, thereon to the applicable redemption date, if
redeemed during the twelve-month period beginning on February 1 of the years
indicated below:




                            YEAR                        PERCENTAGE
                                                           
         2002......................................      105.375 %
         2003......................................      102.688 %
         2004 and thereafter.......................      100.000 %


        Notwithstanding the foregoing, at any time prior to February 1, 2001,
the Company may redeem up to 33% of the original aggregate principal amount of
Notes at a redemption price of 110.75% of the principal amount thereof, plus
accrued and unpaid interest and Liquidated Damages, if any, to the redemption
date, with the net cash proceeds of a Public Equity Offering; provided that at
least 67% of the original aggregate principal amount of Notes remains
outstanding immediately after the occurrence of such redemption; and provided,
further, that such redemption shall occur within 90 days of the date of the
closing of such Public Equity Offering.

        6. MANDATORY REDEMPTION. Except as set forth in paragraph 7 below, the
Company shall not be required to make mandatory redemption or sinking fund
payments with respect to the Senior Notes.

        7.     REPURCHASE AT OPTION OF HOLDER.

               (a) Upon the occurrence of a Change of Control, each Holder of
Senior Notes will have the right to require the Company to repurchase all or any
part (equal to $1,000 or an integral multiple thereof) of such Holder's Senior
Notes pursuant to the offer described below (the "Change of Control Offer") at
an offer price in cash equal to 101% of the aggregate principal amount thereof
plus accrued and unpaid interest and Liquidated Damages, if any, thereon, to the
date of purchase. Within 30 days following any Change of Control, the Company
will mail a notice to each Holder describing the transaction or transactions
that constitute the Change of Control setting forth the procedures governing the
Change of Control Offer required by the Indenture.



                                      A-1-5
   100

               (b) When the aggregate amount of Excess Proceeds exceeds $15.0
million, the Company shall offer to all Holders of Senior Notes (an "Asset Sale
Offer") to purchase the maximum principal amount of Senior Notes that may be
purchased out of the Excess Proceeds at an offer price in cash equal to 100% of
principal amount thereof, plus accrued and unpaid interest, and Liquidated
Damages thereon, if any, to the date of purchase in accordance with the
procedures set forth in the Indenture. To the extent that the aggregate amount
of Senior Notes tendered pursuant to an Asset Sale Offer is less than the Excess
Proceeds, the Company may use any remaining Excess Proceeds for any general
corporate purposes. If the aggregate principal amount of Senior Notes
surrendered by Holders thereof exceeds the amount of Excess Proceeds, the
Trustee shall select the Senior Notes to be purchased on a pro rata basis. Upon
completion of such offer to purchase, the amount of Excess Proceeds shall be
reset at zero.

               (c) Holders of the Senior Notes that are the subject of an offer
to purchase will receive a Change of Control Offer or Asset Sale Offer from the
Company prior to any related purchase date and may elect to have such Senior
Notes purchased by completing the form titled "Option of Holder to Elect
Purchase" appearing below.

        8. NOTICE OF REDEMPTION. Notice of redemption shall be mailed at least
30 days but not more than 60 days before the redemption date to each Holder
whose Senior Notes are to be redeemed at its registered address. Senior Notes in
denominations larger than $1,000 may be redeemed in part but only in whole
multiples of $1,000, unless all of the Senior Notes held by a Holder are to be
redeemed. On and after the redemption date, interest and Liquidated Damages, if
any, ceases to accrue on the Senior Notes or portions thereof called for
redemption.

        9. DENOMINATIONS, TRANSFER, EXCHANGE. The Senior Notes are in registered
form without coupons in initial denominations of $1,000 and integral multiples
of $1,000. The transfer of the Senior Notes may be registered and the Senior
Notes may be exchanged as provided in the Indenture. The Registrar and the
Trustee may require a Holder, among other things, to furnish appropriate
endorsements and transfer documents and the Company may require a Holder to pay
any taxes and fees required by law or permitted by the Indenture. The Company
need not exchange or register the transfer of any Senior Note or portion of a
Senior Note selected for redemption, except for the unredeemed portion of any
Senior Note being redeemed in part. Also, it need not exchange or register the
transfer of any Senior Notes for a period of 15 days before a selection of
Senior Notes to be redeemed or during the period between a record date and the
corresponding Interest Payment Date.

        10. PERSONS DEEMED OWNERS. The registered Holder of a Senior Note may be
treated as its owner for all purposes.

        11. AMENDMENT, SUPPLEMENT AND WAIVER. Subject to the following
paragraphs, the Indenture, the Senior Notes and the Note Guarantees may be
amended or supplemented with the consent of the Holders of at least a majority
in principal amount of the Senior Notes then outstanding (including, without
limitation, consents obtained in connection with a 



                                      A-1-6
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purchase of or, tender offer or exchange offer for Senior Notes), and any
existing Default or Event of Default or compliance with any provision of the
Indenture, the Senior Notes or the Note Guarantees may be waived with the
consent of the Holders of a majority in principal amount of the then outstanding
Senior Notes (including consents obtained in connection with a tender offer or
exchange offer for Senior Notes).

        Without the consent of any Holder of Senior Notes, the Company and the
Trustee may amend or supplement the Indenture, the Note Guarantees or the Senior
Notes to cure any ambiguity, defect or inconsistency, to provide for
uncertificated Senior Notes in addition to or in place of certificated Senior
Notes, to provide for the assumption of the Company's or a Subsidiary
Guarantor's obligations to Holders of Senior Notes in the case of a merger or
consolidation, to make any change that would provide any additional rights or
benefits to the Holders of Senior Notes or that does not adversely affect the
legal rights under the Indenture of any such Holder, to comply with the
requirements of the Commission in order to effect or maintain the qualification
of the Indenture under the Trust Indenture Act or to allow any Subsidiary to
guarantee the Senior Notes.

        12. DEFAULTS AND REMEDIES. Events of Default include: (i) default for 30
days in the payment when due of interest on or Liquidated Damages, if any, with
respect to the Senior Notes; (ii) default in payment when due of the principal
of or premium, if any, on the Senior Notes; (iii) failure by the Company or any
Restricted Subsidiary to comply with the provisions described in Sections 4.10,
4.13 or 5.1 of the Indenture; (iv) failure by the Company or any Restricted
Subsidiary for 30 days after notice from the Trustee or at least 25% in
principal amount of the Senior Notes to comply with the provisions described in
Sections 4.7 and 4.9, of the Indenture; (v) failure by the Company or any
Subsidiary for 60 days after notice from the Trustee or the Holders of at least
25% in principal amount of the Senior Notes then outstanding to comply with its
other agreements in the Indenture or the Senior Notes; (vi) default under any
mortgage, indenture or instrument under which there may be issued or by which
there may be secured or evidenced any Indebtedness for money borrowed by the
Company or any of their its Subsidiaries (or the payment of which is guaranteed
by the Company or any of its Subsidiaries) whether such Indebtedness or
guarantee now exists, or is created after the date hereof, which default (A) (i)
is caused by a failure to pay when due at final stated maturity (giving effect
to any grace period related thereto) any principal of or premium, if any, or
interest on such Indebtedness (a "Payment Default") or (ii) results in the
acceleration of such Indebtedness prior to its express maturity and (B) in each
case, the principal amount of any such Indebtedness, together with the principal
amount of any other such Indebtedness under which there has been a Payment
Default or the maturity of which has been so accelerated, aggregates $5.0
million or more; (vii) failure by the Company or any of its Subsidiaries to pay
final judgments aggregating in excess of $5.0 million, which judgments are not
paid, discharged or stayed within 60 days after their entry; and (viii) certain
events of bankruptcy or insolvency with respect to the Company, any of its
Significant Subsidiaries or any group of Subsidiaries that, taken together,
would constitute a Significant Subsidiary.

        If any Event of Default occurs and is continuing, the Trustee or the
Holders of at least 25% in principal amount of the then outstanding Senior Notes
may declare all the Senior Notes to be due 



                                     A-1-7
   102

and payable immediately. Notwithstanding the foregoing, in the case of an Event
of Default arising from certain events of bankruptcy or insolvency, with respect
to the Company or any of its Significant Subsidiaries all outstanding Senior
Notes will become due and payable without further action or notice. Holders of
the Senior Notes may not enforce the Indenture or the Senior Notes except as
provided in the Indenture. Subject to certain limitations, Holders of a majority
in principal amount of the then outstanding Senior Notes may direct the Trustee
in its exercise of any trust or power. The Trustee may withhold from Holders of
the Senior Notes notice of any continuing Default or Event of Default (except a
Default or Event of Default relating to the payment of principal or interest) if
it determines that withholding notice is in their interest.

        13. TRUSTEE DEALINGS WITH COMPANY. The Trustee, in its individual or any
other capacity, may make loans to, accept deposits from, and perform services
for the Company, the Subsidiary Guarantors or their respective Affiliates, and
may otherwise deal with the Company, the Subsidiary Guarantors or their
respective Affiliates, as if it were not the Trustee.

        14. NO RECOURSE AGAINST OTHERS. No director, officer, employee,
incorporator or stockholder, of the Company or any Subsidiary Guarantor, as
such, shall have any liability for any obligations of the Company or any
Subsidiary Guarantor under the Senior Notes, the Indenture or the Note
Guarantees or for any claim based on, in respect of, or by reason of, such
obligations or their creation. Each Holder of Senior Notes by accepting a Senior
Note waives and releases all such liability. The waiver and release are part of
the consideration for the issuance of the Senior Notes and any Note Guarantee.

        15. AUTHENTICATION. This Senior Note shall not be valid until
authenticated by the manual signature of the Trustee or an authenticating agent.

        16. ABBREVIATIONS. Customary abbreviations may be used in the name of a
Holder or an assignee, such as: TEN COM (= tenants in common), TEN ENT (=
tenants by the entireties), JT TEN (= joint tenants with right of survivorship
and not as tenants in common), CUST (= Custodian), and U/G/M/A (= Uniform Gifts
to Minors Act).

        17. ADDITIONAL RIGHTS OF HOLDERS OF TRANSFER RESTRICTED SECURITIES. In
addition to the rights provided to Holders of the Senior Notes under the
Indenture, Holders of Transferred Restricted Securities (as defined in the
Registration Rights Agreement) shall have all the rights set forth in the
Registration Rights Agreement, dated as of the date hereof, among the Company,
the Subsidiary Guarantors and the Initial Purchaser (the "Registration Rights
Agreement").

        18. CUSIP NUMBERS. Pursuant to a recommendation promulgated by the
Committee on Uniform Security Identification Procedures, the Company has caused
CUSIP numbers to be printed on the Senior Notes and the Trustee may use CUSIP
numbers in notices of redemption as a convenience to the Holders. No
representation is made as to the accuracy of such numbers either as 



                                     A-1-8
   103

printed on the Senior Notes or as contained in any notice of redemption and
reliance may be placed only on the other identification numbers placed thereon.

        The Company shall furnish to any Holder upon written request and without
charge a copy of the Indenture and/or the Registration Rights Agreement.
Requests may be made to:

        Phase Metrics, Inc.
        10260 Sorrento Valley Road
        San Diego, California 92121
        Telecopier No. (619) 646-4990
        Chief Financial Officer


                                     A-1-9
   104

                                 ASSIGNMENT FORM


        To assign this Senior Note, fill in the form below: (I) or (we) assign
and transfer this Senior Note to


- --------------------------------------------------------------------------------
                  (Insert assignee's soc. sec. or tax I.D. no.)


- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
              (Print or type assignee's name, address and zip code)

and irrevocably appoint_____________________________________________ to transfer
this Senior Note on the books of the Company. The agent may substitute another
to act for him.


Date:_________________

                                       Your Signature:
                                                      --------------------------
                                       (Sign exactly as your name appears on the
                                       face of this Senior Note)


Signature Guarantee:

[Signature must be guaranteed by an Eligible Guarantor Institution (banks, stock
brokers, savings and loan associations and credit unions) with membership in an
approved signature guarantee medallion program pursuant to Securities and
Exchange Commission Rule 17Ad-15 if Senior Notes are to be delivered 




                                     A-1-10
   105

other than to and in the name of the registered holder.]

                                     A-1-11
   106

                       OPTION OF HOLDER TO ELECT PURCHASE

        If you want to elect to have this Senior Note purchased by the Company
pursuant to Section 4.10 or 4.13 of the Indenture, check the box below:

        [ ] Section 4.10            [ ] Section 4.13

        If you want to elect to have only part of the Senior Note purchased by
the Company pursuant to Section 4.10 or Section 4.13 of the Indenture, state the
principal amount you elect to have purchased:

$
- -------------


Date:                                  Your Signature:
     -----------------------                          --------------------------
                                       (Sign exactly as your name appears on the
                                        Senior Note)

Tax Identification No.:
                       ------------------------

Signature Guarantee.


[Signature must be guaranteed by an Eligible Guarantor Institution (banks, stock
brokers, savings and loan associations and credit unions) with membership in an
approved signature guarantee medallion program pursuant to Securities and
Exchange Commission Rule 17Ad-15.]



                                     A-1-12
   107


                    SCHEDULE OF EXCHANGES OF SENIOR NOTES(3)

                THE FOLLOWING EXCHANGES OF A PART OF THIS GLOBAL
                   NOTE FOR OTHER SENIOR NOTES HAVE BEEN MADE:



                                                       AMOUNT OF    
                  AMOUNT OF            AMOUNT OF      INCREASE IN 
                 DECREASE IN          INCREASE IN     THIS GLOBAL  
                  PRINCIPAL            PRINCIPAL         NOTE       
                  AMOUNT OF            AMOUNT OF       FOLLOWING    
   DATE OF       THIS GLOBAL         THIS GLOBAL         SUCH       
   EXCHANGE         NOTE                 NOTE          DECREASE     
- ------------    ------------         ------------    ---------------
                                            



(3) This should be included only if the Senior Note is issued in global form.


                                     A-1-13
   108

                                   EXHIBIT A-2

   
   (Face of Regulation S Temporary Global Note) 10-3/4% Senior Notes due 2005
    

No._____                                $_______________ ISIN NO.: USU 7172EAA11



        Phase Metrics, Inc. promises to pay to ________________ or registered
assigns, the principal sum of ________ Dollars on February 1, 2005.



        Interest Payment Dates: February 1 and August 1

        Record Dates: January 15 and July 15



                                        PHASE METRICS, INC.


                                        By:
                                           -------------------------------------
                                        Name:
                                        Title:


This is one of the Senior Notes referred to in the within-mentioned Indenture:


Dated:
      -----------------------------

STATE STREET BANK AND TRUST COMPANY
OF CALIFORNIA, N.A.,
as Trustee


By:
   --------------------------------
        Authorized Signatory



   109

                  (Back of Regulation S Temporary Global Note)

                         10-3/4% Senior Notes due 2005


        UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR NOTES IN
DEFINITIVE FORM, THIS NOTE MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE
DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO
THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE DEPOSITARY OR ANY
SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR
DEPOSITARY. UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE
OF THE DEPOSITORY TRUST COMPANY (55 WATER STREET, NEW YORK, NEW YORK) ("DTC"),
TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT,
AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER
NAME AS MAY BE REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT
IS MADE TO CEDE & CO. OR SUCH OTHER ENTITY AS MAY BE REQUESTED BY AN AUTHORIZED
REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER
HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

        [THIS NOTE (OR ITS PREDECESSOR) HAS NOT BEEN REGISTERED UNDER THE U.S.
SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND, ACCORDINGLY, MAY
NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED WITHIN THE UNITED STATES
OR TO, OR FOR THE ACCOUNT OR BENEFIT OF, U.S. PERSONS, EXCEPT AS SET FORTH IN
THE SECOND SENTENCE HEREOF. BY ITS ACQUISITION HEREOF OR OF A BENEFICIAL
INTEREST HEREIN, THE HOLDER (1) REPRESENTS THAT (A) IT IS A "QUALIFIED
INSTITUTIONAL BUYER" (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) (A
"QIB"), (B) IT IS ACQUIRING THIS NOTE IN AN OFFSHORE TRANSACTION IN COMPLIANCE
WITH REGULATION S UNDER THE SECURITIES ACT OR (C) IT IS AN INSTITUTIONAL
"ACCREDITED INVESTOR" (AS DEFINED IN RULE 501(A) (1), (2), (3) OR (7) OF
REGULATION D UNDER THE SECURITIES ACT (AN "IAI"), (2) AGREES THAT IT WILL NOT,
RESELL OR OTHERWISE TRANSFER THIS NOTE EXCEPT (A) TO THE COMPANY OR ANY OF ITS
SUBSIDIARIES, (B) TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A QIB
PURCHASING FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF A QIB IN A TRANSACTION
MEETING THE REQUIREMENTS OF RULE 144A, (C) IN AN OFFSHORE TRANSACTION MEETING
THE REQUIREMENTS OF RULE 903 OR 904 OF THE SECURITIES ACT, (D) IN A TRANSACTION
MEETING THE REQUIREMENTS OF RULE 144 UNDER THE SECURITIES ACT, (E) TO AN IAI
THAT, PRIOR TO SUCH TRANSFER, FURNISHES THE TRUSTEE A SIGNED LETTER CONTAINING
CERTAIN REPRESENTATIONS AND AGREEMENTS RELATING TO THE TRANSFER OF THIS NOTE
(THE FORM OF WHICH CAN BE OBTAINED FROM THE TRUSTEE) AND, IF SUCH TRANSFER IS IN
RESPECT OF AN AGGREGATE PRINCIPAL AMOUNT OF NOTES LESS THAN $250,000, AN OPINION
OF COUNSEL ACCEPTABLE TO THE COMPANY THAT SUCH TRANSFER IS IN COMPLIANCE WITH
THE SECURITIES ACT, (F) IN ACCORDANCE WITH ANOTHER 


                                     A-2-2
   110

EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT (AND BASED
UPON AN OPINION OF COUNSEL ACCEPTABLE TO THE COMPANY) OR (G) PURSUANT TO AN
EFFECTIVE REGISTRATION STATEMENT AND, IN EACH CASE, IN ACCORDANCE WITH THE
APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED STATES OR ANY OTHER
APPLICABLE JURISDICTION AND (3) AGREES THAT IT WILL DELIVER TO EACH PERSON TO
WHOM THIS NOTE OR AN INTEREST HEREIN IS TRANSFERRED A NOTICE SUBSTANTIALLY TO
THE EFFECT OF THIS LEGEND. AS USED HEREIN, THE TERMS "OFFSHORE TRANSACTION" AND
"UNITED STATES" HAVE THE MEANINGS GIVEN TO THEM BY RULE 902 OF REGULATION S
UNDER THE SECURITIES ACT. THE INDENTURE CONTAINS A PROVISION REQUIRING THE
TRUSTEE TO REFUSE TO REGISTER ANY TRANSFER OF THIS NOTE IN VIOLATION OF THE
FOREGOING.

THE RIGHTS ATTACHING TO THIS REGULATION S TEMPORARY GLOBAL NOTE, AND THE
CONDITIONS AND PROCEDURES GOVERNING ITS EXCHANGE FOR CERTIFICATED NOTES, ARE AS
SPECIFIED IN THE INDENTURE (AS DEFINED HEREIN). NEITHER THE HOLDER NOR THE
BENEFICIAL OWNERS OF THIS REGULATION S TEMPORARY GLOBAL NOTE SHALL BE ENTITLED
TO RECEIVE CASH PAYMENTS OF INTEREST DURING THE PERIOD WHICH SUCH HOLDER HOLDS
THIS NOTE. NOTHING IN THIS LEGEND SHALL BE DEEMED TO PREVENT INTEREST FROM
ACCRUING ON THIS NOTE.](1)

        Until this Regulation S Temporary Global Note is exchanged for
Regulation S Permanent Global Notes, the Holder hereof shall not be entitled to
receive payments of interest or Liquidated Damages, if any, hereon although
interest and Liquidated Damages, if any, will continue to accrue; until so
exchanged in full, this Regulation S Temporary Global Note shall in all other
respects be entitled to the same benefits as other Senior Notes under the
Indenture.

        This Regulation S Temporary Global Note is exchangeable in whole or in
part for one or more Regulation S Permanent Global Notes or U.S. Global Notes
only (i) on or after the termination of the 40-day restricted period (as defined
in Regulation S) and (ii) upon presentation of certificates (accompanied by an
Opinion of Counsel, if applicable) required by Article 2 of the Indenture. Upon
exchange of this Regulation S Temporary Global Note for one or more Regulation S
Permanent Global Notes or U.S. Global Notes, the Trustee shall cancel this
Regulation S Temporary Global Note.

        This Regulation S Temporary Global Note shall not become valid or
obligatory until the certificate of authentication hereon shall have been duly
manually signed by the Trustee in accordance with the Indenture. This Regulation
S Temporary Global Note shall be governed by and construed in accordance with
the laws of the State of the New York. All references to "$," "Dollars,"
"dollars" or "U.S. $" are to such coin or currency of the United States of
America as at the time shall be legal tender for the payment of public and
private debts therein.

- --------------------

        (1) These paragraphs should be removed upon the exchange of Regulation S
Temporary Global Notes for Regulation S Permanent Global Notes pursuant to the
Indenture.

                                     A-2-3
   111

        Capitalized terms used herein shall have the meanings assigned to them
in the Indenture referred to below unless otherwise indicated.

        1. INTEREST. Phase Metrics, Inc., a Delaware corporation, or its
successor (the "Company"), promises to pay interest on the principal amount of
this Senior Note at the rate of 10-3/4% per annum and shall pay the Liquidated
Damages, if any, payable pursuant to Section 5 of the Registration Rights
Agreement referred to below. The Company will pay interest and Liquidated
Damages, if any, in United States dollars (except as otherwise provided herein)
semi-annually in arrears on February 1 and August 1, commencing on August 1,
1998, or if any such day is not a Business Day, on the next succeeding Business
Day (each an "Interest Payment Date"). Interest on the Senior Notes shall accrue
from the most recent date to which interest has been paid or, if no interest has
been paid, from the date of issuance; provided that if there is no existing
Default or Event of Default in the payment of interest, and if this Senior Note
is authenticated between a record date referred to on the face hereof and the
next succeeding Interest Payment Date, interest shall accrue from such next
succeeding Interest Payment Date, except in the case of the original issuance of
Senior Notes, in which case interest shall accrue from the date of
authentication. The Company shall pay interest (including post-petition interest
in any proceeding under any Bankruptcy Law) on overdue principal at the rate
equal to 1% per annum in excess of the then applicable interest rate on the
Senior Notes to the extent lawful; it shall pay interest (including post-
petition interest in any proceeding under any Bankruptcy Law) on overdue
installments of interest and Liquidated Damages (without regard to any
applicable grace period) at the same rate to the extent lawful. Interest shall
be computed on the basis of a 360-day year comprised of twelve 30-day months.

        2. METHOD OF PAYMENT. The Company will pay interest on the Senior Notes
(except defaulted interest) and Liquidated Damages, if any, on the applicable
Interest Payment Date to the Persons who are registered Holders of Senior Notes
at the close of business on the January 15 or July l5 next preceding the
Interest Payment Date, even if such Senior Notes are canceled after such record
date and on or before such Interest Payment Date, except as provided in Section
2.12 of the Indenture with respect to defaulted interest. The Senior Notes shall
be payable as to principal, premium and Liquidated Damages, if any, and interest
at the office or agency of the Company maintained for such purpose within or
without the City and State of New York, or, at the option of the Company,
payment of interest and Liquidated Damages, if any, may be made by check mailed
to the Holders at their addresses set forth in the register of Holders; provided
that payment by wire transfer of immediately available funds shall be required
with respect to principal of, premium and Liquidated Damages, if any, and
interest on, all Global Notes and all other Senior Notes the Holders of which
shall have provided written wire transfer instructions to the Company and the
Paying Agent. Such payment shall be in such coin or currency of the United
States of America as at the time of payment is legal tender for payment of
public and private debts.

        3. PAYING AGENT AND REGISTRAR. Initially, State Street Bank and Trust
Company of California, N.A., the Trustee under the Indenture, shall act as
Paying Agent and Registrar. The Company may change any Paying Agent or Registrar
without notice to any Holder. The Company or any of its Subsidiaries may act in
any such capacity.


                                     A-2-4
   112

        4. INDENTURE. The Company issued the Senior Notes under an Indenture
dated as of January 30, 1998 ("Indenture") among the Company, the Subsidiary
Guarantors and the Trustee. The terms of the Senior Notes include those stated
in the Indenture and those made a part of the Indenture by reference to the
Trust Indenture Act of 1939, as amended (15 U.S. Code Sections 77aaa-77bbbb)
(the "TIA"). The Senior Notes are subject to all such terms, and Holders are
referred to the Indenture and such Act for a statement of such terms. The Senior
Notes are general unsecured Obligations of the Company limited to $110,000,000
in aggregate principal amount, plus amounts, if any, sufficient to pay premium
or Liquidated Damages, if any, and interest on outstanding Senior Notes as set
forth in Paragraph 2 hereof.

        5. OPTIONAL REDEMPTION. Except as set forth in the next paragraph, the
Senior Notes shall not be redeemable at the Company's option prior to February
1, 2002. Thereafter, the Senior Notes shall be subject to redemption at the
option of the Company, in whole or in part, upon not less than 30 nor more than
60 days' notice, at the redemption prices (expressed as percentages of principal
amount) set forth below together with accrued and unpaid interest and any
Liquidated Damages, if any, thereon to the applicable redemption date, if
redeemed during the twelve-month period beginning on February 1 of the years
indicated below:



                            YEAR                        PERCENTAGE
                                                           
         2002......................................      105.375 %
         2003......................................      102.688 %
         2004 and thereafter.......................      100.000 %


        Notwithstanding the foregoing, at any time prior to February 1, 2001,
the Company may redeem up to 33% of the original aggregate principal amount of
Senior Notes at a redemption price of 110.75% of the principal amount thereof,
plus accrued and unpaid interest and Liquidated Damages, if any, to the
redemption date, with the net proceeds of a Public Equity Offering; provided
that at least 67% of the original aggregate principal amount of Senior Notes
remains outstanding immediately after the occurrence of such redemption; and
provided, further, that such redemption shall occur within 90 days of the date
of the closing of such Public Equity Offering.

        6. MANDATORY REDEMPTION. Except as set forth in paragraph 7 below, the
Company shall not be required to make mandatory redemption or sinking fund
payments with respect to the Senior Notes.

        7. REPURCHASE AT OPTION OF HOLDER.

               (a) Upon the occurrence of a Change of Control, each Holder of
Senior Notes will have the right to require the Company to repurchase all or any
part (equal to $1,000 or an integral multiple thereof) of such Holder's Senior
Notes pursuant to the offer described below (the "Change of Control Offer") at
an offer price in cash equal to 101% of the aggregate principal amount thereof
plus accrued and unpaid interest and Liquidated Damages, if any, thereon, to the
date of purchase. Within 30 days following any Change of Control, the Company
will mail a notice to each Holder 



                                     A-2-5
   113

describing the transaction or transactions that constitute the Change of Control
setting forth the procedures governing the Change of Control Offer required by
the Indenture.

               (b) When the aggregate amount of Excess Proceeds exceeds $15.0
million, the Company shall offer to all Holders of Senior Notes (an "Asset Sale
Offer") to purchase the maximum principal amount of Senior Notes that may be
purchased out of the Excess Proceeds at an offer price in cash equal to 100% of
principal amount thereof, plus accrued and unpaid interest, and Liquidated
Damages thereon, if any, to the date of purchase in accordance with the
procedures set forth in the Indenture. To the extent that the aggregate amount
of Senior Notes tendered pursuant to an Asset Sale Offer is less than the Excess
Proceeds, the Company may use any remaining Excess Proceeds for any general
corporate purposes. If the aggregate principal amount of Senior Notes
surrendered by Holders thereof exceeds the amount of Excess Proceeds, the
Trustee shall select the Senior Notes to be purchased on a pro rata basis. Upon
completion of such offer to purchase, the amount of Excess Proceeds shall be
reset at zero.

               (c) Holders of the Senior Notes that are the subject of an offer
to purchase will receive a Change of Control Offer or Asset Sale Offer from the
Company prior to any related purchase date and may elect to have such Senior
Notes purchased by completing the form titled "Option of Holder to Elect
Purchase" appearing below.

        8. NOTICE OF REDEMPTION. Notice of redemption shall be mailed at least
30 days but not more than 60 days before the redemption date to each Holder
whose Senior Notes are to be redeemed at its registered address. Senior Notes in
denominations larger than $1,000 may be redeemed in part but only in whole
multiples of $1,000, unless all of the Senior Notes held by a Holder are to be
redeemed. On and after the redemption date, interest and Liquidated Damages, if
any, ceases to accrue on the Senior Notes or portions thereof called for
redemption.

        9. DENOMINATIONS, TRANSFER, EXCHANGE. The Senior Notes are in registered
form without coupons in initial denominations of $1,000 and integral multiples
of $1,000. The transfer of the Senior Notes may be registered and the Senior
Notes may be exchanged as provided in the Indenture. The Registrar and the
Trustee may require a Holder, among other things, to furnish appropriate
endorsements and transfer documents and the Company may require a Holder to pay
any taxes and fees required by law or permitted by the Indenture. The Company
need not exchange or register the transfer of any Senior Note or portion of a
Senior Note selected for redemption, except for the unredeemed portion of any
Senior Note being redeemed in part. Also, it need not exchange or register the
transfer of any Senior Notes for a period of 15 days before a selection of
Senior Notes to be redeemed or during the period between a record date and the
corresponding Interest Payment Date.

        10. PERSONS DEEMED OWNERS. The registered Holder of a Senior Note may be
treated as its owner for all purposes.


                                     A-2-6
   114

        11. AMENDMENT, SUPPLEMENT AND WAIVER. Subject to the following
paragraphs, the Indenture, the Senior Notes and the Note Guarantees may be
amended or supplemented with the consent of the Holders of at least a majority
in principal amount of the Senior Notes then outstanding (including, without
limitation, consents obtained in connection with a purchase of or, tender offer
or exchange offer for Senior Notes), and any existing Default or Event of
Default or compliance with any provision of the Indenture, the Senior Notes or
the Note Guarantees may be waived with the consent of the Holders of a majority
in principal amount of the then outstanding Senior Notes (including consents
obtained in connection with a tender offer or exchange offer for Senior Notes).

        Without the consent of any Holder of Senior Notes, the Company and the
Trustee may amend or supplement the Indenture, the Note Guarantees or the Senior
Notes to cure any ambiguity, defect or inconsistency, to provide for
uncertificated Senior Notes in addition to or in place of certificated Senior
Notes, to provide for the assumption of the Company's or a Subsidiary
Guarantor's obligations to Holders of Senior Notes in the case of a merger or
consolidation, to make any change that would provide any additional rights or
benefits to the Holders of Senior Notes or that does not adversely affect the
legal rights under the Indenture of any such Holder, to comply with the
requirements of the Commission in order to effect or maintain the qualification
of the Indenture under the Trust Indenture Act or to allow any Subsidiary to
guarantee the Senior Notes.

        12. DEFAULTS AND REMEDIES. Events of Default include: (i) default for 30
days in the payment when due of interest on or Liquidated Damages, if any, with
respect to the Senior Notes; (ii) default in payment when due of the principal
of or premium, if any, on the Senior Notes; (iii) failure by the Company or any
Restricted Subsidiary to comply with the provisions described in Sections 4.10,
4.13 or 5.1 of the Indenture; (iv) failure by the Company or any Restricted
Subsidiary for 30 days after notice from the Trustee or at least 25% in
principal amount of the Senior Notes to comply with the provisions described in
Sections 4.7 and 4.9, of the Indenture; (v) failure by the Company or any
Subsidiary for 60 days after notice from the Trustee or the Holders of at least
25% in principal amount of the Senior Notes then outstanding to comply with its
other agreements in the Indenture or the Senior Notes; (vi) default under any
mortgage, indenture or instrument under which there may be issued or by which
there may be secured or evidenced any Indebtedness for money borrowed by the
Company or any of their its Subsidiaries (or the payment of which is guaranteed
by the Company or any of its Subsidiaries) whether such Indebtedness or
guarantee now exists, or is created after the date hereof, which default (A) (i)
is caused by a failure to pay when due at final stated maturity (giving effect
to any grace period related thereto) any principal of or premium, if any, or
interest on such Indebtedness (a "Payment Default") or (ii) results in the
acceleration of such Indebtedness prior to its express maturity and (B) in each
case, the principal amount of any such Indebtedness, together with the principal
amount of any other such Indebtedness under which there has been a Payment
Default or the maturity of which has been so accelerated, aggregates $5.0
million or more; (vii) failure by the Company or any of its Subsidiaries to pay
final judgments aggregating in excess of $5.0 million, which judgments are not
paid discharged or stayed within 60 days after their entry; and (viii) certain
events of bankruptcy or insolvency with respect to the 



                                     A-2-7
   115

Company, any of its Significant Subsidiaries or any group of Subsidiaries that,
taken together, would constitute a Significant Subsidiary.

        If any Event of Default occurs and is continuing, the Trustee or the
Holders of at least 25% in principal amount of the then outstanding Senior Notes
may declare all the Senior Notes to be due and payable immediately.
Notwithstanding the foregoing, in the case of an Event of Default arising from
certain events of bankruptcy or insolvency, with respect to the Company or any
of its Significant Subsidiaries all outstanding Senior Notes will become due and
payable without further action or notice. Holders of the Senior Notes may not
enforce the Indenture or the Senior Notes except as provided in the Indenture.
Subject to certain limitations, Holders of a majority in principal amount of the
then outstanding Senior Notes may direct the Trustee in its exercise of any
trust or power. The Trustee may withhold from Holders of the Senior Notes notice
of any continuing Default or Event of Default (except a Default or Event of
Default relating to the payment of principal or interest) if it determines that
withholding notice is in their interest.

        13. TRUSTEE DEALINGS WITH COMPANY. The Trustee, in its individual or any
other capacity, may make loans to, accept deposits from, and perform services
for the Company, the Subsidiary Guarantors or their respective Affiliates, and
may otherwise deal with the Company, the Subsidiary Guarantors or their
respective Affiliates, as if it were not the Trustee.

        14. NO RECOURSE AGAINST OTHERS. No director, officer, employee,
incorporator or stockholder, of the Company or any Subsidiary Guarantor, as
such, shall have any liability for any obligations of the Company or any
Subsidiary Guarantor under the Senior Notes, the Indenture or the Note
Guarantees or for any claim based on, in respect of, or by reason of, such
obligations or their creation. Each Holder of Senior Notes by accepting a Senior
Note waives and releases all such liability. The waiver and release are part of
the consideration for the issuance of the Senior Notes and any Note Guarantee.

        15. AUTHENTICATION. This Senior Note shall not be valid until
authenticated by the manual signature of the Trustee or an authenticating agent.

        16. ABBREVIATIONS. Customary abbreviations may be used in the name of a
Holder or an assignee, such as: TEN COM (= tenants in common), TEN ENT (=
tenants by the entireties), JT TEN (= joint tenants with right of survivorship
and not as tenants in common), CUST (= Custodian), and U/G/M/A (= Uniform Gifts
to Minors Act).

        17. ADDITIONAL RIGHTS OF HOLDERS OF TRANSFER RESTRICTED SECURITIES. In
addition to the rights provided to Holders of the Senior Notes under the
Indenture, Holders of Transferred Restricted Securities (as defined in the
Registration Rights Agreement) shall have all the rights set forth in the
Registration Rights Agreement, dated as of the date hereof, among the Company,
the Subsidiary Guarantors and the Initial Purchaser (the "Registration Rights
Agreement").



                                     A-2-8
   116

        18. CUSIP NUMBERS. Pursuant to a recommendation promulgated by the
Committee on Uniform Security Identification Procedures, the Company has caused
CUSIP numbers to be printed on the Senior Notes and the Trustee may use CUSIP
numbers in notices of redemption as a convenience to the Holders. No
representation is made as to the accuracy of such numbers either as printed on
the Senior Notes or as contained in any notice of redemption and reliance may be
placed only on the other identification numbers placed thereon.

        The Company shall furnish to any Holder upon written request and without
charge a copy of the Indenture and/or the Registration Rights Agreement.
Requests may be made to:

        Phase Metrics, Inc.
        10260 Sorrento Valley Road
        San Diego, California 92121
        Telecopier No. (619) 646-4990
        Chief Financial Officer



                                     A-2-9
   117

                     SCHEDULE OF EXCHANGES FOR GLOBAL NOTES

        The following exchanges of a part of this Regulation S Temporary Global
Note for other Global Notes have been made:




                            Amount of           Amount of       Principal Amount    Signature of
                           Decrease in        Increase in        of this Global     authorized
                         Principal Amount    Principal Amount    Note following     officer of
      Date of            of this Global      of this Global      such decrease      Trustee or Senior
      Exchange                Note                Note           (or increase)      Note Custodian
- ---------------------   ------------------   ----------------   -----------------  -------------------
                                                                       




                                     A-2-10
   118


                                    EXHIBIT B

                         FORM OF CERTIFICATE OF TRANSFER

State Street Bank and Trust Company of California, N.A.
725 South Figueroa Street, Suite 3100
Los Angeles, CA 90017


        Re: 10-3/4% Senior Notes due 2005

        Reference is hereby made to the Indenture, dated as of January 30, 1998
(the "Indenture"), among Phase Metrics, Inc., as issuer (the "Company"), certain
of its subsidiaries, and State Street Bank and Trust Company of California,
N.A., as trustee. Capitalized terms used but not defined herein shall have the
meanings given to them in the Indenture.

        ______________, (the "Transferor") owns and proposes to transfer the
Notes] or interest in such Notes] specified in Annex A hereto, in the principal
amount of $___________ in such Notes] or interests (the "Transfer"), to
__________ (the "Transferee"), as further specified in Annex A hereto. In
connection with the Transfer, the Transferor hereby certifies that:

                             [CHECK ALL THAT APPLY]

1. [ ] CHECK IF TRANSFEREE WILL TAKE DELIVERY OF A BENEFICIAL INTEREST IN THE
U.S. GLOBAL NOTE OR A RESTRICTED DEFINITIVE NOTE PURSUANT TO RULE 144A. The
Transfer is being effected pursuant to and in accordance with Rule 144A under
the United States Securities Act of 1933, as amended (the "Securities Act"),
and, accordingly, the Transferor hereby further certifies that the beneficial
interest or Restricted Definitive Note is being transferred to a Person that the
Transferor reasonably believed and believes is purchasing the beneficial
interest or Restricted Definitive Note for its own account, or for one or more
accounts with respect to which such Person exercises sole investment discretion,
and such Person and each such account is a "qualified institutional buyer"
within the meaning of Rule 144A in a transaction meeting the requirements of
Rule 144A and such Transfer is in compliance with any applicable blue sky
securities laws of any state of the United States. Upon consummation of the
proposed Transfer in accordance with the terms of the Indenture, the transferred
beneficial interest or Restricted Definitive Note will be subject to the
restrictions on transfer enumerated in the Private Placement Legend printed on
the 144A Global Note and/or the Restricted Definitive Note and in the Indenture
and the Securities Act.

2. [ ] CHECK IF TRANSFEREE WILL TAKE DELIVERY OF A BENEFICIAL INTEREST IN THE
TEMPORARY REGULATION S GLOBAL NOTE, THE REGULATION S GLOBAL NOTE OR A RESTRICTED
DEFINITIVE NOTE PURSUANT TO REGULATION S. The Transfer is being effected
pursuant to and in accordance with Rule 903 or Rule 904 under the Securities Act
and, accordingly, the Transferor hereby further certifies that (i) the Transfer
is not being made to a person in the United States and (x) at the time the buy
order was 


   119

originated, the Transferee was outside the United States or such Transferor and
any Person acting on its behalf reasonably believed and believes that the
Transferee was outside the United States or (y) the transaction was executed in,
on or through the facilities of a designated offshore securities market and
neither such Transferor nor any Person acting on its behalf knows that the
transaction was prearranged with a buyer in the United States, (ii) no directed
selling efforts have been made in contravention of the requirements of Rule
903(b) or Rule 904(b) of Regulation S under the Securities Act, (iii) the
transaction is not part of a plan or scheme to evade the registration
requirements of the Securities Act and (iv) if the proposed Transfer is being
made prior to the expiration of the 40-day restricted period, the Transfer is
not being made to a U.S. Person or for the account or benefit of a U.S. Person
(other than an Initial Purchaser). Upon consummation of the proposed Transfer in
accordance with the terms of the Indenture, the transferred beneficial interest
or Restricted Definitive Note will be subject to the restrictions on Transfer
enumerated in the Private Placement Legend printed on the Regulation S Global
Note, the Temporary Regulation S Global Note and/or the Definitive Note and in
the Indenture and the Securities Act.

3. [ ] CHECK AND COMPLETE IF TRANSFEREE WILL TAKE DELIVERY OF A RESTRICTED
DEFINITIVE NOTE PURSUANT TO ANY PROVISION OF THE SECURITIES ACT OTHER THAN RULE
144A OR REGULATION S. The Transfer is being effected in compliance with the
transfer restrictions applicable to Restricted Definitive Notes and pursuant to
and in accordance with the Securities Act and any applicable blue sky securities
laws of any state of the United States, and accordingly the Transferor hereby
further certifies that (check one):

        (a) [ ] such Transfer is being effected pursuant to and in accordance
with Rule 144 under the Securities Act;

                                       or

        (b) [ ] such Transfer is being effected to the Company or a Subsidiary
thereof;

                                       or

        (c) [ ] such Transfer is being effected pursuant to an effective
registration statemeNT under the Securities Act and in compliance with the
prospectus delivery requirements of the Securities Act;

                                       or

        (d) [ ] such Transfer is being effected to an Institutional Accredited
Investor and pursuant to an exemption from the registration requirements of the
Securities Act other than Rule 144A, Rule 144 or Rule 904, and the Transferor
hereby further certifies that the Transfer complies with the transfer
restrictions applicable to Restricted Definitive Notes and the requirements of
the exemption claimed, which certification is supported by (1) a certificate
executed by the Transferee in the form of Exhibit D to the Indenture and (2) if
such Transfer is in respect of a principal amount of Notes at the time of
transfer of less than $250,000, an Opinion of Counsel provided by the Transferor
or the 



                                      B-3
   120

Transferee (a copy of which the Transferor has attached to this certification),
to the effect that such Transfer is in compliance with the Securities Act. Upon
consummation of the proposed transfer in accordance with the terms of the
Indenture, the transferred beneficial interest or Restricted Definitive Note
will be subject to the restrictions on transfer enumerated in the Private
Placement Legend printed on the Restricted Definitive Notes and in the Indenture
and the Securities Act.

4. [ ] CHECK IF TRANSFEREE WILL TAKE DELIVERY OF A BENEFICIAL INTEREST IN AN
UNRESTRICTED GLOBAL NOTE OR OF AN UNRESTRICTED DEFINITIVE NOTE.

        (a) [ ] CHECK IF TRANSFER IS PURSUANT TO RULE 144. (i) The Transfer is
being effecteD pursuant to and in accordance with Rule 144 under the Securities
Act and in compliance with the transfer restrictions contained in the Indenture
and any applicable blue sky securities laws of any state of the United States
and (ii) the restrictions on transfer contained in the Indenture and the Private
Placement Legend are not required in order to maintain compliance with the
Securities Act. Upon consummation of the proposed Transfer in accordance with
the terms of the Indenture, the transferred beneficial interest or Unrestricted
Definitive Note will no longer be subject to the restrictions on transfer
enumerated in the Private Placement Legend printed on the Restricted Global
Notes, on Restricted Definitive Notes and in the Indenture.

        (b) [ ] CHECK IF TRANSFER IS PURSUANT TO REGULATION S. (i) The Transfer
is being effected pursuant to and in accordance with Rule 903 or Rule 904 under
the Securities Act and in compliance with the transfer restrictions contained in
the Indenture and any applicable blue sky securities laws of any state of the
United States and (ii) the restrictions on transfer contained in the Indenture
and the Private Placement Legend are not required in order to maintain
compliance with the Securities Act. Upon consummation of the proposed Transfer
in accordance with the terms of the Indenture, the transferred beneficial
interest or Unrestricted Definitive Note will no longer be subject to the
restrictions on transfer enumerated in the Private Placement Legend printed on
the Restricted Global Notes, on Restricted Definitive Notes and in the
Indenture.

        (c) [ ] CHECK IF TRANSFER IS PURSUANT TO OTHER EXEMPTION. (i) The
Transfer is being effected pursuant to and in compliance with an exemption from
the registration requirements of the Securities Act other than Rule 144, Rule
903 or Rule 904 and in compliance with the transfer restrictions contained in
the Indenture and any applicable blue sky securities laws of any State of the
United States and (ii) the restrictions on transfer contained in the Indenture
and the Private Placement Legend are not required in order to maintain
compliance with the Securities Act. Upon consummation of the proposed Transfer
in accordance with the terms of the Indenture, the transferred beneficial
interest or Unrestricted Definitive Note will not be subject to the restrictions
on transfer enumerated in the Private Placement Legend printed on the Restricted
Global Notes or Restricted Definitive Notes and in the Indenture.



                                      B-4
   121


        This certificate and the statements contained herein are made for your
benefit and the benefit of the Company.

                                      [Insert Name of Transferor]


                                      By:
                                         ---------------------------------------
                                      Name:
                                      Title:

Dated:                  ,
      ------------------  --------


                                      B-5
   122

                       ANNEX A TO CERTIFICATE OF TRANSFER


1.      The Transferor owns and proposes to transfer the following:

                            [CHECK ONE OF (a) OR (b)]

        (a)     [ ] a beneficial interest in the:

                (i)     [ ] U.S. 144A Global Note (CUSIP: 717217AA1/ISIN:
                        USU717217 AA14), or

                (ii)    [ ] Regulation S Global Note (CUSIP: 717217AB9/ISIN:
                        USU7172EAA11), or

        (b)     [ ] a Restricted Definitive Note.


2.      After the Transfer the Transferee will hold:

                                   [CHECK ONE]

        (a)     [ ] a beneficial interest in the:

                (i)     [ ] 144A Global Note (CUSIP 717217 AA1), or

                (ii)    [ ] Regulation S Global Note (CUSIP/ISIN 717217 AB 9/
                        USU7172EAA11), or

                (iii)   [ ] Unrestricted Global Note (CUSIP); or

        (b)     [ ] a Restricted Definitive Note; or

        (c)     [ ] an Unrestricted Definitive Note,

in accordance with the terms of the Indenture.


                                      B-6
   123

                                    EXHIBIT C

                         FORM OF CERTIFICATE OF EXCHANGE



State Street Bank and Trust Company of California, N.A.
725 South Figueroa Street, Suite 3100
Los Angeles, CA 90017

        Re:  10-3/4% Senior Notes due 2005 (CUSIP                       )

        Reference is hereby made to the Indenture, dated as of January 30, 1998
(the "Indenture"), among Phase Metrics, Inc. as issuer (the "Company"), certain
subsidiaries of the Company and State Street Bank and Trust Company of
California, N.A., as trustee. Capitalized terms used but not defined herein
shall have the meanings given to them in the Indenture.

        ________________ , (the "Owner") owns and proposes to exchange the
Notes] or interest in such Notes] specified herein, in the principal amount of
$____________ in such Notes] or interests (the "Exchange"). In connection with
the Exchange, the Owner hereby certifies that:

1. EXCHANGE OF RESTRICTED DEFINITIVE NOTES OR BENEFICIAL INTERESTS IN A
RESTRICTED GLOBAL NOTE FOR UNRESTRICTED DEFINITIVE NOTES OR BENEFICIAL INTERESTS
IN AN UNRESTRICTED GLOBAL NOTE

        (a) [ ] CHECK IF EXCHANGE IS FROM BENEFICIAL INTEREST IN A RESTRICTED
GLOBAL NOTE TO BENEFICIAL INTEREST IN AN UNRESTRICTED GLOBAL NOTE. In connection
with the Exchange of the Owner's beneficial interest in a Restricted Global Note
for a beneficial interest in an Unrestricted Global Note in an equal principal
amount, the Owner hereby certifies (i) the beneficial interest is being acquired
for the Owner's own account without transfer, (ii) such Exchange has been
effected in compliance with the transfer restrictions applicable to the
Restricted Global Notes and pursuant to and in accordance with the United States
Securities Act of 1933, as amended (the "Securities Act"), (iii) the
restrictions on transfer contained in the Indenture and the Private Placement
Legend are not required in order to maintain compliance with the Securities Act
and (iv) the beneficial interest in an Unrestricted Global Note is being
acquired in compliance with any applicable blue sky securities laws of any state
of the United States.

        (b) [ ] CHECK IF EXCHANGE IS FROM BENEFICIAL INTEREST IN A RESTRICTED
GLOBAL NOTE TO UNRESTRICTED DEFINITIVE NOTE. In connection with the Exchange of
the Owner's beneficial interest in a Restricted Global Note for an Unrestricted
Definitive Note, the Owner hereby certifies (i) the Definitive Note is being
acquired for the Owner's own account without transfer, (ii) such Exchange has
been effected in compliance with the transfer restrictions applicable to the
Restricted Global Notes and pursuant to and in accordance with the Securities
Act, (iii) the restrictions on transfer contained in the Indenture and the
Private Placement Legend are not required in order to maintain compliance 



   124

with the Securities Act and (iv) the Unrestricted Definitive Note is being
acquired in compliance with any applicable blue sky securities laws of any state
of the United States.

        (c) [ ] CHECK IF EXCHANGE IS FROM RESTRICTED DEFINITIVE NOTE TO
BENEFICIAL INTEREST IN AN UNRESTRICTED GLOBAL NOTE. In connection with the
Owner's Exchange of a Restricted Definitive Note for a beneficial interest in an
Unrestricted Global Note, the Owner hereby certifies (i) the beneficial interest
is being acquired for the Owner's own account without transfer, (ii) such
Exchange has been effected in compliance with the transfer restrictions
applicable to Restricted Definitive Notes and pursuant to and in accordance with
the Securities Act, (iii) the restrictions on transfer contained in the
Indenture and the Private Placement Legend are not required in order to maintain
compliance with the Securities Act and (iv) the beneficial interest is being
acquired in compliance with any applicable blue sky securities laws of any state
of the United States.

        (d) [ ] CHECK IF EXCHANGE IS FROM RESTRICTED DEFINITIVE NOTE TO
UNRESTRICTED DEFINITIVE NOTE. In connection with the Owner's Exchange of a
Restricted Definitive Note for an Unrestricted Definitive Note, the Owner hereby
certifies (i) the Unrestricted Definitive Note is being acquired for the Owner's
own account without transfer, (ii) such Exchange has been effected in compliance
with the transfer restrictions applicable to Restricted Definitive Notes and
pursuant to and in accordance with the Securities Act, (iii) the restrictions on
transfer contained in the Indenture and the Private Placement Legend are not
required in order to maintain compliance with the Securities Act and (iv) the
Unrestricted Definitive Note is being acquired in compliance with any applicable
blue sky securities laws of any state of the United States.

2. EXCHANGE OF RESTRICTED DEFINITIVE NOTES OR BENEFICIAL INTERESTS IN RESTRICTED
GLOBAL NOTES FOR RESTRICTED DEFINITIVE NOTES OR BENEFICIAL INTERESTS IN
RESTRICTED GLOBAL NOTES

        (a) [ ] CHECK IF EXCHANGE IS FROM BENEFICIAL INTEREST IN A RESTRICTED
GLOBAL NOTE TO RESTRICTED DEFINITIVE NOTE. In connection with the Exchange of
the Owner's beneficial interest in a Restricted Global Note for a Restricted
Definitive Note with an equal principal amount, the Owner hereby certifies that
the Restricted Definitive Note is being acquired for the Owner's own account
without transfer. Upon consummation of the proposed Exchange in accordance with
the terms of the Indenture, the Restricted Definitive Note issued will continue
to be subject to the restrictions on transfer enumerated in the Private
Placement Legend printed on the Restricted Definitive Note and in the Indenture
and the Securities Act.

        (b) [ ] CHECK IF EXCHANGE IS FROM RESTRICTED DEFINITIVE NOTE TO
BENEFICIAL INTEREST IN A RESTRICTED GLOBAL NOTE. In connection with the Exchange
of the Owner's Restricted Definitive Note for a beneficial interest in the
[CHECK ONE] [ ] U.S. Global Note or [ ] Regulation S GLOBal Note, with an equal
principal amount, the Owner hereby certifies (i) such Owner acquired such
Restricted Definitive Note in a transaction pursuant to Rule 144A or Regulation
S, (ii) the beneficial interest is being acquired for the Owner's own account
without transfer and (iii) such Exchange has been effected in compliance with
the transfer restrictions applicable to the Restricted Global Notes and pursuant
to and in accordance with the Securities Act, and in compliance with any
applicable blue sky securities laws of any state of the United States. Upon
consummation of the proposed Exchange in accordance 


   125

with the terms of the Indenture, the beneficial interest issued will be subject
to the restrictions on transfer enumerated in the Private Placement Legend
printed on the relevant Restricted Global Note and in the Indenture and the
Securities Act.

        This certificate and the statements contained herein are made for your
benefit and the benefit of the Company.


                             [Insert Name of Owner]


                                    By:
                                       -----------------------------------------
                                    Name:
                                    Title:

Dated:                  ,
      -----------------   -------

                                      C-3


   126

                                    EXHIBIT D

                            FORM OF CERTIFICATE FROM
                   ACQUIRING INSTITUTIONAL ACCREDITED INVESTOR


State Street Bank and Trust Company of California, N.A.
725 South Figueroa Street, Suite 3100
Los Angeles, CA 90017


        Re:   10-3/4% Senior Notes due 2005


        Reference is hereby made to the Indenture, dated as of January 30, 1998
(the "Indenture"), among Phase Metrics, Inc., as issuer (the "Company"), certain
of the Company's subsidiaries and State Street Bank and Trust Company, as
trustee. Capitalized terms used but not defined herein shall have the meanings
given to them in the Indenture.

        In connection with our proposed purchase of $____________ aggregate
principal amount of Restricted Definitive Notes we confirm that:

        1. We understand that any subsequent transfer of the Notes or any
interest therein is subject to certain restrictions and conditions set forth in
the Indenture and the undersigned agrees to be bound by, and not to resell,
pledge or otherwise transfer the Notes or any interest therein except in
compliance with, such restrictions and conditions and the United States
Securities Act of 1933, as amended (the "Securities Act").

        2. We understand that the Notes have not been registered under the
Securities Act, and that the Notes and any interest therein may not be offered
or sold except as permitted in the following sentence. We agree, on our own
behalf and on behalf of each account for which we acquire any Notes (for which
are acting as hereinafter stated), that such Notes may be offered, resold,
pledged or otherwise transferred only (i) to a person whom we reasonably believe
to be a "qualified institutional buyer" (as defined in Rule 144A under the
Securities Act) in a transaction meeting the requirements of Rule 144A, in a
transaction meeting the requirements of Rule 144 under the Securities Act,
outside the United States in a transaction meeting the requirements of Rule 904
under the Securities Act, or in accordance with another exemption from the
registration requirements of the Securities Act (and based upon an opinion of
counsel if the Company so requests), (ii) to the Company or (iii) pursuant to an
effective registration statement, and, in each case, in accordance with any
applicable securities laws of any State of the United States or any other
applicable jurisdiction. We further agreement to provide to any person
purchasing the Definitive Note or a beneficial interest in a Global Note from us
in a transaction meeting the requirements of (i) or (ii) of this paragraph a
notice advising such purchaser that resales thereof are restricted as stated
herein.


   127

        3. We understand that, on any proposed resale of the Notes or beneficial
interest therein, we will be required to furnish to you and the Company such
certifications, legal opinions and other information as you and the Company may
reasonably require to confirm that the proposed sale complies with the foregoing
restrictions. We further understand that the Notes purchased by us will bear a
legend to the foregoing effect.

        4. We are an institutional "accredited investor" (as defined in Rule
501(a)(1), (2), (3) or (7) of Regulation D under the Securities Act) and have
such knowledge and experience in financial and business matters as to be capable
of evaluating the merits and risks of our investment in the Notes, and we and
any accounts for which we are acting are each able to bear the economic risk of
our or its investment.

        5. We are acquiring the Notes without a view to distribution thereof in
violation of the Securities Act for our own account or for one or more accounts
(each of which is an institutional "accredited investor") as to each of which we
exercise sole investment discretion.

        You and the Company are entitled to rely upon this letter and are
irrevocably authorized to produce this letter or a copy hereof to any interested
party in any administrative or legal proceedings or official inquiry with
respect to the matters covered hereby.


                                    ------------------------------------
                                    [Insert Name of Accredited Investor]


                                    By:
                                       ---------------------------------
                                    Name:
                                    Title:

Dated:              ,
      -------------- ------


   128

                                    EXHIBIT E

                                 NOTE GUARANTEE


        Subject to Section 10.6 of the Indenture, each Subsidiary Guarantor
hereby, jointly and severally, unconditionally guarantees to each Holder of a
Senior Note authenticated and delivered by the Trustee and to the Trustee and
its successors and assigns, irrespective of the validity and enforceability of
the Indenture, the Senior Notes and the Obligations of the Company under the
Senior Notes or under the Indenture, that: (a) the principal of, premium, if
any, interest and Liquidated Damages, if any, on the Senior Notes will be
promptly paid in full when due, subject to any applicable grace period, whether
at maturity, by acceleration, redemption or otherwise, and interest on overdue
principal, premium, if any, (to the extent permitted by law) interest on any
interest, if any, and Liquidated Damages, if any, on the Senior Notes and all
other payment Obligations of the Company to the Holders or the Trustee under the
Indenture or under the Senior Notes will be promptly paid in full and performed,
all in accordance with the terms thereof; and (b) in case of any extension of
time of payment or renewal of any Senior Notes or any of such other payment
Obligations, the same will be promptly paid in full when due or performed in
accordance with the terms of the extension or renewal, subject to any applicable
grace period, whether at stated maturity, by acceleration, redemption or
otherwise. Failing payment when so due of any amount so guaranteed or any
performance so guaranteed for whatever reason, the Subsidiary Guarantors will be
jointly and severally obligated to pay the same immediately.

        The obligations of the Subsidiary Guarantor to the Holders and to the
Trustee pursuant to this Note Guarantee and the Indenture are expressly set
forth in Article 10 of the Indenture, and reference is hereby made to such
Indenture for the precise terms of this Note Guarantee. The terms of Article 10
of the Indenture are incorporated herein by reference. This Note Guarantee is
subject to release as and to the extent provided in Section 10.4 of the
Indenture.

        This is a continuing Guarantee and shall remain in full force and effect
and shall be binding upon each Subsidiary Guarantor and its respective
successors and assigns to the extent set forth in the Indenture until full and
final payment of all of the Company's Obligations under the Senior Notes and the
Indenture and shall inure to the benefit of the successors and assigns of the
Trustee and the Holders and, in the event of any transfer or assignment of
rights by any Holder or the Trustee, the rights and privileges herein conferred
upon that party shall automatically extend to and be vested in such transferee
or assignee, all subject to the terms and conditions hereof. This is a Note
Guarantee of payment and not a guarantee of collection.

        This Note Guarantee shall not be valid or obligatory for any purpose
until the certificate of authentication on the Senior Note upon which this Note
Guarantee is noted shall have been executed by the Trustee under the Indenture
by the manual signature of one of its authorized officers.


   129

        For purposes hereof, each Subsidiary Guarantor's liability shall be
limited to the lesser of (i) the aggregate amount of the Obligations of the
Company under the Senior Notes and the Indenture and (ii) the amount, if any,
which would not have (A) rendered such Subsidiary Guarantor "insolvent" (as such
term is defined in the Bankruptcy Law and in the Debtor and Creditor Law of the
State of New York) or (B) left such Subsidiary Guarantor with unreasonably small
capital at the time its Note Guarantee of the Senior Notes was entered into;
provided that, it will be a presumption in any lawsuit or other proceeding in
which a Subsidiary Guarantor is a party that the amount guaranteed pursuant to
the Note Guarantee is the amount set forth in clause (i) above unless any
creditor, or representative of creditors of such Subsidiary Guarantor, or debtor
in possession or trustee in bankruptcy of such Subsidiary Guarantor, otherwise
proves in such a lawsuit that the aggregate liability of the Subsidiary
Guarantor is limited to the amount set forth in clause (ii) above. The Indenture
provides that, in making any determination as to the solvency or sufficiency of
capital of a Subsidiary Guarantor in accordance with the previous sentence, the
right of such Subsidiary Guarantors to contribution from other Subsidiary
Guarantors and any other rights such Subsidiary Guarantors may have, contractual
or otherwise, shall be taken into account.


                  {remainder of page intentionally left blank}


                                      E-2

   130

        Capitalized terms used herein have the same meanings given in the
Indenture unless otherwise indicated.



Dated as of January 30, 1998           HELIOS, INCORPORATED


                                       By:
                                          --------------------------------------
                                       Name: R. Joseph Saunders
                                       Title:


Dated as of January 30, 1998           APPLIED ROBOTIC TECHNOLOGIES, INC.


                                       By:
                                          --------------------------------------
                                       Name: R. Joseph Saunders
                                       Title:


Dated as of January 30, 1998           AIR BEARINGS, INCORPORATED


                                       By:
                                          --------------------------------------
                                       Name: R. Joseph Saunders
                                       Title:


Dated as of January 30, 1998           SANTA BARBARA METRIC, INC.


                                       By:
                                          --------------------------------------
                                       Name: R. Joseph Saunders
                                       Title:


                                      E-3

   131

                                    EXHIBIT F

                         FORM OF SUPPLEMENTAL INDENTURE


        SUPPLEMENTAL INDENTURE (this "Supplemental Indenture"), dated as of
___________, between Subsidiary Guarantor (the "New Subsidiary Guarantor"), a
subsidiary of Phase Metrics, Inc., a Delaware corporation (the "Company"), and
State Street Bank and Trust Company of California, N.A., as trustee under the
indenture referred to below (the "Trustee"). Capitalized terms used herein and
not defined herein shall have the meaning ascribed to them in the Indenture (as
defined below).

                               W I T N E S S E T H

        WHEREAS, the Company has heretofore executed and delivered to the
Trustee an indenture (the "Indenture"), dated as of January 30, 1998, providing
for the issuance of an aggregate principal amount of $110,000,000 of 10-3/4 %
Senior Notes due 2005 (the "Senior Notes");

        WHEREAS, Section 10.5 of the Indenture provides that under certain
circumstances the Company may cause, and Section 10.3 of the Indenture provides
that under certain circumstances the Company must cause, certain of its
subsidiaries to execute and deliver to the Trustee a supplemental indenture
pursuant to which such subsidiaries shall unconditionally guarantee all of the
Company's Obligations under the Senior Notes pursuant to a Note Guarantee on the
terms and conditions set forth herein; and

        WHEREAS, pursuant to Section 9.1 of the Indenture, the Trustee is
authorized to execute and deliver this Supplemental Indenture.

        NOW THEREFORE, in consideration of the foregoing and for other good and
valuable consideration, the receipt of which is hereby acknowledged, the New
Subsidiary Guarantor and the Trustee mutually covenant and agree for the equal
and ratable benefit of the Holders of the Senior Notes as follows:

        1. CAPITALIZED TERMS. Capitalized terms used herein without definition
shall have the meanings assigned to them in the Indenture.

        2. AGREEMENT TO NOTE GUARANTEE. The New Subsidiary Guarantor hereby
agrees, jointly and severally with all other Subsidiary Guarantors, to guarantee
the Company's Obligations under the Senior Notes and the Indenture on the terms
and subject to the conditions set forth in Article 10 of the Indenture and to be
bound by all other applicable provisions of the Indenture.

        3. NO RECOURSE AGAINST OTHERS. No past, present or future director,
officer, employee, incorporator, shareholder or agent of any Subsidiary
Guarantor, as such, shall have any liability for any obligations of the Company
or any Subsidiary Guarantor under the Senior Notes, any 




   132

Note Guarantees, the Indenture or this Supplemental Indenture or for any claim
based on, in respect of, or by reason of, such obligations or their creation.
Each Holder by accepting a Senior Note waives and releases all such liability.
The waiver and release are part of the consideration for issuance of the Senior
Notes.

        4. NEW YORK LAW TO GOVERN. The internal law of the State of New York
shall govern and be used to construe this Supplemental Indenture.

        5. COUNTERPARTS The parties may sign any number of copies of this
Supplemental Indenture. Each signed copy shall be an original, but all of them
together represent the same agreement.

        6. EFFECT OF HEADINGS. The Section headings herein are for convenience
only and shall not affect the construction hereof.

        7. THE TRUSTEE. The Trustee shall not be responsible in any manner
whatsoever for or in respect of the validity or sufficiency of this Supplemental
Indenture or for or in respect of the correctness of the recitals of fact
contained herein, all of which recitals are made solely by the New Subsidiary
Guarantor.

        IN WITNESS WHEREOF, the parties hereto have caused this Supplemental
Indenture to be duly executed and attested, all as of the date first above
written.


Dated: 
       ------------------             [NAME OF NEW SUBSIDIARY GUARANTOR]


                                      By:
                                         ---------------------------------------
                                      Name:
                                      Title:

Dated:                                                              , as Trustee
     --------------------             ------------------------------------------


                                      By:
                                         ---------------------------------------
                                      Name:
                                      Title:



                                      F-2
   133

                             CROSS-REFERENCE TABLE*
                                 Trust Indenture



Act Section                                        Indenture Section
                                              
310        (a)(1)................................  7.10
           (a)(2)................................  7.10
           (a)(3)................................  N.A.
           (a)(4)................................  N.A.
           (a)(5)................................  7.10
           (b)...................................  7.03; 7.10
           (c)...................................  N.A.

311        (a)...................................  7.11
           (b)...................................  7.11
           (c)...................................  N.A.

312        (a)...................................  2.05
           (b)...................................  11.03
           (c)...................................  11.03

313        (a)...................................  7.06
           (b)(1)................................  7.06
           (b)(2)................................  7.06; 7.07
           (c)...................................  7.06; 11.02
           (d)...................................  7.06

314        (a)...................................  4.03; 11.05
           (b)...................................  N.A.
           (c)(1)................................  11.04
           (c)(2)................................  11.04
           (c)(3)................................  N.A.
           (d)...................................  N.A.
           (e)...................................  11.05
           (f)...................................  N.A.

315        (a)...................................  7.01
           (b)...................................  7.05, 11.02
           (c)...................................  7.01
           (d)...................................  7.01
           (e)...................................  6.11

316        (a)(last sentence)....................  2.09
           (a)(1)(A).............................  6.05
           (a)(1)(B).............................  6.04



                                      F-3

   134



Act Section                                        Indenture Section
                                              
           (a)(2)................................  N.A.
           (b)...................................  6.07
316        (c)...................................  2.13

317        (a)(1)................................  6.08
           (a)(2)................................  6.09
           (b)...................................  2.04

318        (a)...................................  11.01
           (b)...................................  N.A.
           (c)...................................  11.01


- -------------------

N.A. means not applicable

*This Cross-Reference Table is not part of the Indenture.

                                      F-4