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                                                                     EXHIBIT 4.4
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                                  A/B EXCHANGE
                          REGISTRATION RIGHTS AGREEMENT


                          Dated as of January 30, 1998

                                  by and among

                               Phase Metrics, Inc.
                              Helios, Incorporated
                       Applied Robotic Technologies, Inc.
                           Air Bearings, Incorporated
                           Santa Barbara Metric, Inc.

                                       and

             Donaldson, Lufkin & Jenrette Securities Corporation


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            This Registration Rights Agreement (this "AGREEMENT") is made and
entered into as of January 30, 1998, by and among Phase Metrics, Inc., a
Delaware corporation (the "COMPANY"), Helios, Incorporated, Applied Robotic
Technologies, Inc., Air Bearings, Incorporated and Santa Barbara Metric, Inc.
(the "GUARANTORS"), and Donaldson, Lufkin & Jenrette Securities Corporation (the
"INITIAL PURCHASER"), each of whom has agreed to purchase the Company's 10 3/4%
Senior Notes due 2005 (the "SENIOR NOTES") pursuant to the Purchase Agreement
(as defined below).

            This Agreement is made pursuant to the Purchase Agreement, dated
January 23, 1998 (the "PURCHASE AGREEMENT"), by and among the Company, the
Guarantors and the Initial Purchaser. In order to induce the Initial Purchaser
to purchase the Series A Notes, the Company has agreed to provide the
registration rights set forth in this Agreement. The execution and delivery of
this Agreement is a condition to the obligations of the Initial Purchaser set
forth in Section 9 of the Purchase Agreement. Capitalized terms used herein and
not otherwise defined shall have the meaning assigned to them the Indenture,
dated January 30, 1998, between the Company and State Street Bank and Trust
Company of California, N.A., as Trustee, relating to the Senior Notes and the
New Senior Notes (the "INDENTURE").

            The parties hereby agree as follows:

SECTION 1.  DEFINITIONS

            As used in this Agreement, the following capitalized terms shall
have the following meanings:

            ACT: The Securities Act of 1933, as amended.

            AFFILIATE:  As defined in Rule 144 of the Act.

            BROKER-DEALER: Any broker or dealer registered under the Exchange
Act.

            CERTIFICATED SECURITIES: Definitive Notes, as defined in the
Indenture.

            CLOSING DATE: The date hereof.

            COMMISSION: The Securities and Exchange Commission.

            CONSUMMATE: An Exchange Offer shall be deemed "Consummated" for
purposes of this Agreement upon the occurrence of (a) the filing and
effectiveness under the Act of the Exchange Offer Registration Statement
relating to the New Senior Notes to be issued in the Exchange Offer, (b) the
maintenance of such Exchange Offer Registration Statement continuously effective
and the keeping of the Exchange Offer open for a period not less than the period
required pursuant to Section 3(b) hereof and (c) the delivery by the Company to
the Registrar under the Indenture of New Senior Notes in the same aggregate
principal amount as the aggregate principal amount of Senior Notes tendered by
Holders thereof pursuant to the Exchange Offer.

            EFFECTIVENESS DEADLINE: As defined in Section 3(a) and 4(a) hereof.

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            EXCHANGE ACT: The Securities Exchange Act of 1934, as amended.

            EXCHANGE OFFER: The exchange and issuance by the Company of a
principal amount of New Senior Notes (which shall be registered pursuant to the
Exchange Offer Registration Statement) equal to the outstanding principal amount
of Senior Notes that are tendered by such Holders in connection with such
exchange and issuance.

            EXCHANGE OFFER REGISTRATION STATEMENT: The Registration Statement
relating to the Exchange Offer, including the related Prospectus.

            EXEMPT RESALES: The transactions in which the Initial Purchaser
proposes to sell the Senior Notes to certain "qualified institutional buyers,"
as such term is defined in Rule 144A under the Act and pursuant to Regulation S
under the Act.

            FILING DEADLINE: As defined in Sections 3(a) and 4(a) hereof.

            HOLDERS: As defined in Section 2 hereof.

            NEW SENIOR NOTES: The Company's 10 3/4% Senior Notes due 2005 to be
issued pursuant to the Indenture: (i) in the Exchange Offer or (ii) as
contemplated by Section 4 hereof.

            PROSPECTUS: The prospectus included in a Registration Statement at
the time such Registration Statement is declared effective, as amended or
supplemented by any prospectus supplement and by all other amendments thereto,
including post-effective amendments, and all material incorporated by reference
into such Prospectus.

            RECOMMENCEMENT DATE: As defined in Section 6(d) hereof.

            REGISTRATION DEFAULT: As defined in Section 5 hereof.

            REGISTRATION STATEMENT: Any registration statement of the Company
and the Guarantors relating to (a) an offering of New Senior Notes pursuant to
an Exchange Offer or (b) the registration for resale of Transfer Restricted
Securities pursuant to the Shelf Registration Statement, in each case, (i) that
is filed pursuant to the provisions of this Agreement and (ii) including the
Prospectus included therein, all amendments and supplements thereto (including
post-effective amendments) and all exhibits and material incorporated by
reference therein.

            REGULATION S: Regulation S promulgated under the Act.

            RULE 144: Rule 144 promulgated under the Act.

            SHELF REGISTRATION STATEMENT: As defined in Section 4 hereof.

            SUSPENSION NOTICE: As defined in Section 6(d) hereof.

            TIA: The Trust Indenture Act of 1939 (15 U.S.C. Section
77aaa-77bbbb) as in effect on the date of the Indenture.

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            TRANSFER RESTRICTED SECURITIES: Each Senior Note, until the earliest
to occur of (a) the date on which such Senior Note is exchanged in the Exchange
Offer for a New Senior Note which is entitled to be resold to the public by the
Holder thereof without complying with the prospectus delivery requirements of
the Act, (b) the date on which such Senior Note has been disposed of in
accordance with a Shelf Registration Statement (and the purchases thereof have
been issued New Senior Notes therefor), or (c) the date on which such Senior
Note is distributed to the public pursuant to Rule 144 under the Act and (d)
each New Senior Note until the date on which such New Senior Note is disposed of
by a Broker-Dealer pursuant to the "Plan of Distribution" contemplated by the
Exchange Offer Registration Statement (including the delivery of the Prospectus
contained therein).


SECTION 2.  HOLDERS

            A Person is deemed to be a holder of Transfer Restricted Securities
(each, a "HOLDER") whenever such Person owns Transfer Restricted Securities.


SECTION 3.  REGISTERED EXCHANGE OFFER

            (a) Unless the Exchange Offer shall not be permitted by applicable
federal law (after the procedures set forth in Section 6(a)(i) below have been
complied with), the Company and the Guarantors shall (i) cause the Exchange
Offer Registration Statement to be filed with the Commission as soon as
practicable after the Closing Date, but in no event later than 60 days after the
Closing Date (such 60th day being the "FILING DEADLINE"), (ii) use its best
efforts to cause such Exchange Offer Registration Statement to become effective
at the earliest possible time, but in no event later than 120 days after the
Closing Date (such 120th day being the "EFFECTIVENESS DEADLINE"), (iii) in
connection with the foregoing, (A) file all pre-effective amendments to such
Exchange Offer Registration Statement as may be necessary in order to cause it
to become effective, (B) file, if applicable, a post-effective amendment to such
Exchange Offer Registration Statement pursuant to Rule 430A under the Act and
(C) cause all necessary filings, if any, in connection with the registration and
qualification of the New Senior Notes to be made under the Blue Sky laws of such
jurisdictions as are reasonably necessary to permit Consummation of the Exchange
Offer, and (iv) upon the effectiveness of such Exchange Offer Registration
Statement, commence and Consummate the Exchange Offer. The Exchange Offer shall
be on the appropriate form permitting (i) registration of the New Senior Notes
to be offered in exchange for the Senior Notes that are Transfer Restricted
Securities and (ii) resales of New Senior Notes by Broker-Dealers that tendered
into the Exchange Offer Senior Notes that such Broker-Dealer acquired for its
own account as a result of market making activities or other trading activities
(other than Senior Notes acquired directly from the Company or any of its
Affiliates) as contemplated by Section 3(c) below.

            (b) The Company and the Guarantors shall use their respective best
efforts to cause the Exchange Offer Registration Statement to be effective
continuously, and shall keep the Exchange Offer open for a period of not less
than the minimum period required under applicable federal and state securities
laws to Consummate the Exchange Offer; provided, however, that in no event shall
such period be less than 20 Business Days. The Company and the Guarantors shall
cause the Exchange Offer to comply with all applicable federal and state
securities laws. No securities other than the New Senior Notes shall be included
in the Exchange Offer Registration Statement. The Company and the Guarantors
shall use their respective 

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best efforts to cause the Exchange Offer to be Consummated on the earliest
practicable date after the Exchange Offer Registration Statement has become
effective, but in no event later than 30 Business Days thereafter (such 30th day
being the "CONSUMMATION DEADLINE").

            (c) The Company shall include a "Plan of Distribution" section in
the Prospectus contained in the Exchange Offer Registration Statement and
indicate therein that any Broker-Dealer who holds Transfer Restricted Securities
that were acquired for the account of such Broker-Dealer as a result of
market-making activities or other trading activities (other than Senior Notes
acquired directly from the Company or any Affiliate of the Company), may
exchange such Transfer Restricted Securities pursuant to the Exchange Offer.
Such "Plan of Distribution" section shall also contain all other information
with respect to such sales by such Broker-Dealers that the Commission may
require in order to permit such sales pursuant thereto, but such "Plan of
Distribution" shall not name any such Broker-Dealer or disclose the amount of
Transfer Restricted Securities held by any such Broker-Dealer, except to the
extent required by the Commission as a result of a change in policy, rules or
regulations after the date of this Agreement. See the Shearman & Sterling
no-action letter (available July 2, 1993).

            Because such Broker-Dealer may be deemed to be an "underwriter"
within the meaning of the Act and must, therefore, deliver a prospectus meeting
the requirements of the Act in connection with its initial sale of any New
Senior Notes received by such Broker-Dealer in the Exchange Offer, the Company
and Guarantors shall permit the use of the Prospectus contained in the Exchange
Offer Registration Statement by such Broker-Dealer to satisfy such prospectus
delivery requirement. To the extent necessary to ensure that the prospectus
contained in the Exchange Offer Registration Statement is available for such
sales of New Senior Notes by Broker-Dealers, the Company and the Guarantors
agree to use their respective best efforts to keep the Exchange Offer
Registration Statement continuously effective, supplemented, amended and current
as required by and subject to the provisions of Sections 6(a) and (c) hereof and
in conformity with the requirements of this Agreement, the Act and the policies,
rules and regulations of the Commission as announced from time to time, for a
period of one year from the Consummation Deadline or such shorter period as will
terminate when all Transfer Restricted Securities covered by such Registration
Statement have been sold pursuant thereto. The Company and the Guarantors shall
provide sufficient copies of the latest version of such Prospectus to such
Broker-Dealers, promptly upon request, and in no event later than one day after
such request, at any time during such period.


SECTION 4.  SHELF REGISTRATION

            (a) Shelf Registration. If (i) the Exchange Offer is not permitted
by applicable law (after the Company and the Guarantors have complied with the
procedures set forth in Section 6(a)(i) below) or (ii) if any Holder of Transfer
Restricted Securities shall notify the Company within 20 Business Days following
the Consummation Deadline that (A) such Holder was prohibited by law or
Commission policy from participating in the Exchange Offer or (B) such Holder
may not resell the New Senior Notes acquired by it in the Exchange Offer to the
public without delivering a prospectus and the Prospectus contained in the
Exchange Offer Registration Statement is not appropriate or available for such
resales by such Holder or (C) such Holder is a Broker-Dealer and holds Senior
Notes acquired directly from the Company or any of its Affiliates, then the
Company and the Guarantors shall:

      (x) cause to be filed, on or prior to 30 days after the earlier of (i) the
date on which the Company determines that the Exchange Offer Registration
Statement cannot be filed as a result of clause (a)(i) above 

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and (ii) the date on which the Company receives the notice specified in clause
(a)(ii) above, (such earlier date, the "FILING DEADLINE"), a shelf registration
statement pursuant to Rule 415 under the Act (which may be an amendment to the
Exchange Offer Registration Statement (the "SHELF REGISTRATION STATEMENT")),
relating to all Transfer Restricted Securities, and

      (y) shall use their respective best efforts to cause such Shelf
Registration Statement to become effective on or prior to 60 days after the
Filing Deadline for the Shelf Registration Statement (such 60th day the
"EFFECTIVENESS DEADLINE").

            If, after the Company has filed an Exchange Offer Registration
Statement that satisfies the requirements of Section 3(a) above, the Company is
required to file and make effective a Shelf Registration Statement solely
because the Exchange Offer is not permitted under applicable federal law (i.e.,
clause (a)(i) above), then the filing of the Exchange Offer Registration
Statement shall be deemed to satisfy the requirements of clause (x) above;
provided that, in such event, the Company shall remain obligated to meet the
Effectiveness Deadline for the Shelf Registration Statement set forth in clause
(y).

            To the extent necessary to ensure that the Shelf Registration
Statement is available for sales of Transfer Restricted Securities by the
Holders thereof entitled to the benefit of this Section 4(a), the Company and
the Guarantors shall use their respective best efforts to keep any Shelf
Registration Statement required by this Section 4(a) continuously effective,
supplemented, amended and current as required by and subject to the provisions
of Sections 6(b) and (c) hereof and in conformity with the requirements of this
Agreement, the Act and the policies, rules and regulations of the Commission as
announced from time to time, for as long as the Initial Purchaser is deemed to
be an affiliate of the Company but in no event less than the shorter of (i) two
years (as extended pursuant to Section 6(c)(i)) following the Closing Date, or
(ii) the date on which all Transfer Restricted Securities covered by such Shelf
Registration Statement have been sold pursuant thereto.

            (b) Provision by Holders of Certain Information in Connection with
the Shelf Registration Statement. No Holder of Transfer Restricted Securities
may include any of its Transfer Restricted Securities in any Shelf Registration
Statement pursuant to this Agreement unless and until such Holder furnishes to
the Company in writing, within 20 days after receipt of a request therefor, the
information specified in Item 507 or 508 of Regulation S-K, as applicable, of
the Act for use in connection with any Shelf Registration Statement or
Prospectus or preliminary Prospectus included therein. No Holder of Transfer
Restricted Securities shall be entitled to liquidated damages pursuant to
Section 5 hereof unless and until such Holder shall have provided all such
information. Each selling Holder agrees to promptly furnish additional
information required to be disclosed in order to make the information previously
furnished to the Company by such Holder not materially misleading.


SECTION 5.  LIQUIDATED DAMAGES

            If (i) any Registration Statement required by this Agreement is not
filed with the Commission on or prior to the applicable Filing Deadline, (ii)
any such Registration Statement has not been declared effective by the
Commission on or prior to the applicable Effectiveness Deadline, (iii) the
Exchange Offer has not been Consummated on or prior to the Consummation Deadline
or (iv) any Registration Statement required by this Agreement is filed and
declared effective but shall thereafter cease to be effective or fail to be
usable for its intended purpose without being succeeded immediately by a
post-effective amendment to such 

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Registration Statement that cures such failure and that is itself declared
effective immediately (each such event referred to in clauses (i) through (iv),
a "REGISTRATION DEFAULT"), then the Company and the Guarantors hereby jointly
and severally agree to pay to each Holder of Transfer Restricted Securities
affected thereby liquidated damages in an amount equal to $.05 per week per
$1,000 in principal amount of Transfer Restricted Securities held by such Holder
for each week or portion thereof that the Registration Default continues for the
first 90-day period immediately following the occurrence of such Registration
Default. The amount of the liquidated damages shall increase by an additional
$.05 per week per $1,000 in principal amount of Transfer Restricted Securities
with respect to each subsequent 90-day period until all Registration Defaults
have been cured, up to a maximum amount of liquidated damages of $.25 per week
per $1,000 in principal amount of Transfer Restricted Securities; provided that
the Company and the Guarantors shall in no event be required to pay liquidated
damages for more than one Registration Default at any given time.
Notwithstanding anything to the contrary set forth herein, (1) upon filing of
the Exchange Offer Registration Statement (and/or, if applicable, the Shelf
Registration Statement), in the case of (i) above, (2) upon the effectiveness of
the Exchange Offer Registration Statement (and/or, if applicable, the Shelf
Registration Statement), in the case of (ii) above, (3) upon Consummation of the
Exchange Offer, in the case of (iii) above, or (4) upon the filing of a
post-effective amendment to the Registration Statement or an additional
Registration Statement that causes the Exchange Offer Registration Statement
(and/or, if applicable, the Shelf Registration Statement) to again be declared
effective or made usable in the case of (iv) above, the accrual of liquidated
damages payable with respect to the Transfer Restricted Securities as a result
of such clause (i), (ii), (iii) or (iv), as applicable, shall cease.

            All accrued liquidated damages shall be paid to the Holders entitled
thereto, in the manner provided for the payment of interest in the Indenture, on
each Interest Payment Date, as more fully set forth in the Indenture and the
Notes. Notwithstanding the fact that any securities for which liquidated damages
are due cease to be Transfer Restricted Securities, all obligations of the
Company and the Guarantors to pay liquidated damages with respect to securities
shall survive until such time as such obligations with respect to such
securities shall have been satisfied in full.


SECTION 6.  REGISTRATION PROCEDURES

            (a) Exchange Offer Registration Statement. In connection with the
Exchange Offer, the Company and the Guarantors shall (x) comply with all
applicable provisions of Section 6(c) below, (y) use their respective best
efforts to effect such exchange and to permit the resale of New Senior Notes by
Broker-Dealers that tendered in the Exchange Offer Senior Notes that such
Broker-Dealer acquired for its own account as a result of its market making
activities or other trading activities (other than Senior Notes acquired
directly from the Company or any of its Affiliates) being sold in accordance
with the intended method or methods of distribution thereof, and (z) comply with
all of the following provisions:

                  (i) If, following the date hereof there has been announced a
      change in Commission policy with respect to exchange offers such as the
      Exchange Offer, that in the reasonable opinion of counsel to the Company
      raises a substantial question as to whether the Exchange Offer is
      permitted by applicable federal law, the Company and the Guarantors hereby
      agree to seek a no-action letter or other favorable decision from the
      Commission allowing the Company and the Guarantors to Consummate an
      Exchange Offer for such Transfer Restricted Securities. The Company and
      the Guarantors hereby agree to pursue the issuance of such a decision to
      the Commission staff level. In connection with the foregoing, the Company
      and the Guarantors hereby agree to take all such other 
   
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      actions as may be requested by the Commission or otherwise required in
      connection with the issuance of such decision, including without
      limitation (A) participating in telephonic conferences with the
      Commission, (B) delivering to the Commission staff an analysis prepared
      by counsel to the Company setting forth the legal bases, if any, upon
      which such counsel has concluded that such an Exchange Offer should be
      permitted and (C) diligently pursuing a resolution (which need not be
      favorable) by the Commission staff.

                  (ii) As a condition to its participation in the Exchange
      Offer, each Holder of Transfer Restricted Securities (including, without
      limitation, any Holder who is a Broker Dealer) shall furnish, upon the
      request of the Company, prior to the Consummation of the Exchange Offer, a
      written representation to the Company and the Guarantors (which may be
      contained in the letter of transmittal contemplated by the Exchange Offer
      Registration Statement) to the effect that (A) it is not an Affiliate of
      the Company, (B) it is not engaged in, and does not intend to engage in,
      and has no arrangement or understanding with any person to participate in,
      a distribution of the New Senior Notes to be issued in the Exchange Offer
      and (C) it is acquiring the New Senior Notes in its ordinary course of
      business. Each Holder using the Exchange Offer to participate in a
      distribution of the New Senior Notes hereby acknowledges and agrees that,
      if the resales are of New Senior Notes obtained by such Holder in exchange
      for Senior Notes acquired directly from the Company or an Affiliate
      thereof, it (1) could not, under Commission policy as in effect on the
      date of this Agreement, rely on the position of the Commission enunciated
      in Morgan Stanley and Co., Inc. (available June 5, 1991) and Exxon Capital
      Holdings Corporation (available May 13, 1988), as interpreted in the
      Commission's letter to Shearman & Sterling dated July 2, 1993, and similar
      no-action letters (including, if applicable, any no-action letter obtained
      pursuant to clause (i) above), and (2) must comply with the registration
      and prospectus delivery requirements of the Act in connection with a
      secondary resale transaction and that such a secondary resale transaction
      must be covered by an effective registration statement containing the
      selling security holder information required by Item 507 or 508, as
      applicable, of Regulation S-K.

                  (iii) Prior to effectiveness of the Exchange Offer
      Registration Statement, the Company and the Guarantors shall provide a
      supplemental letter to the Commission (A) stating that the Company and the
      Guarantors are registering the Exchange Offer in reliance on the position
      of the Commission enunciated in Exxon Capital Holdings Corporation
      (available May 13, 1988), Morgan Stanley and Co., Inc. (available June 5,
      1991) as interpreted in the Commission's letter to Shearman & Sterling
      dated July 2, 1993, and, if applicable, any no-action letter obtained
      pursuant to clause (i) above, (B) including a representation that neither
      the Company nor any Guarantor has entered into any arrangement or
      understanding with any Person to distribute the New Senior Notes to be
      received in the Exchange Offer and that, to the best of the Company's and
      each Guarantor's information and belief, each Holder participating in the
      Exchange Offer is acquiring the New Senior Notes in its ordinary course of
      business and has no arrangement or understanding with any Person to
      participate in the distribution of the New Senior Notes received in the
      Exchange Offer and (C) any other undertaking or representation required by
      the Commission as set forth in any no-action letter obtained pursuant to
      clause (i) above, if applicable.

            (b) Shelf Registration Statement. (i) In connection with the Shelf
Registration Statement, the Company and the Guarantors shall (x) comply with all
the provisions of Section 6(c) below and (y) use their respective best efforts
to effect such registration to permit the sale of the Transfer Restricted
Securities being sold in accordance with the intended method or methods of
distribution thereof (as indicated 

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in the information furnished to the Company pursuant to Section 4(b) hereof),
and pursuant thereto the Company and the Guarantors will prepare and file with
the Commission a Registration Statement relating to the registration on any
appropriate form under the Act, which form shall be available for the sale of
the Transfer Restricted Securities in accordance with the intended method or
methods of distribution thereof within the time periods and otherwise in
accordance with the provisions hereof.

                  (ii) The Company shall issue, upon the request of any Holder
(after having sold the Senior Notes) or purchaser of Senior Notes (who can
receive the New Senior Notes) covered by any Shelf Registration Statement
contemplated by this Agreement, New Senior Notes having an aggregate principal
amount equal to the aggregate principal amount of Senior Notes sold pursuant to
the Shelf Registration Statement and surrendered to the Company for
cancellation; the Company shall register the New Senior Notes in the name of the
purchaser(s) who purchased securities subject to the Shelf Registration
Statement.

            (c) General Provisions. In connection with any Registration
Statement and any related Prospectus required by this Agreement, the Company and
the Guarantors shall:

                  (i) use their respective best efforts to keep such
      Registration Statement continuously effective and provide all requisite
      financial statements for the period specified in Section 3 or 4 of this
      Agreement, as applicable. Upon the occurrence of any event that would
      cause any such Registration Statement or the Prospectus contained therein
      (A) to contain a material misstatement or omission or (B) not to be
      effective and usable for resale of Transfer Restricted Securities during
      the period required by this Agreement, the Company and the Guarantors
      shall file promptly an appropriate amendment to such Registration
      Statement curing such defect, and, if Commission review is required, use
      their respective best efforts to cause such amendment to be declared
      effective as soon as practicable;

                  (ii) prepare and file with the Commission such amendments and
      post-effective amendments to the applicable Registration Statement as may
      be necessary to keep such Registration Statement effective for the
      applicable period set forth in Section 3 or 4 hereof, as the case may be;
      cause the Prospectus to be supplemented by any required Prospectus
      supplement, and as so supplemented to be filed pursuant to Rule 424 under
      the Act, and to comply fully with Rules 424, 430A and 462, as applicable,
      under the Act in a timely manner; and comply with the provisions of the
      Act with respect to the disposition of all securities covered by such
      Registration Statement during the applicable period in accordance with the
      intended method or methods of distribution by the sellers thereof set
      forth in such Registration Statement or supplement to the Prospectus;

                  (iii) advise each Holder and the Initial Purchaser promptly
      and, if requested by such Person, confirm such advice in writing, (A) when
      the Prospectus or any Prospectus supplement or post-effective amendment
      has been filed, and, with respect to any applicable Registration Statement
      or any post-effective amendment thereto, when the same has become
      effective, (B) of any request by the Commission for amendments to the
      Registration Statement or amendments or supplements to the Prospectus or
      for additional information relating thereto, (C) of the issuance by the
      Commission of any stop order suspending the effectiveness of the
      Registration Statement under the Act or of the suspension by any state
      securities commission of the qualification of the Transfer Restricted
      Securities for offering or sale in any jurisdiction, or the initiation of
      any proceeding for any of the preceding purposes, (D) of the existence of
      any fact or the happening of any event that makes any statement of a
      material fact made in the Registration Statement, the Prospectus, any
      amendment or supplement thereto or any document incorporated by reference
      therein untrue, or that requires the making of any 

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      additions to or changes in the Registration Statement in order to make the
      statements therein not misleading, or that requires the making of any
      additions to or changes in the Prospectus in order to make the statements
      therein, in the light of the circumstances under which they were made, not
      misleading. If at any time the Commission shall issue any stop order
      suspending the effectiveness of the Registration Statement, or any state
      securities commission or other regulatory authority shall issue an order
      suspending the qualification or exemption from qualification of the
      Transfer Restricted Securities under state securities or Blue Sky laws,
      the Company and the Guarantors shall use their respective best efforts to
      obtain the withdrawal or lifting of such order at the earliest possible
      time;

                  (iv) subject to Section 6(c)(i), if any fact or event
      contemplated by Section 6(c)(iii)(D) above shall exist or have occurred,
      prepare a supplement or post-effective amendment to the Registration
      Statement or related Prospectus or any document incorporated therein by
      reference or file any other required document so that, as thereafter
      delivered to the purchasers of Transfer Restricted Securities, the
      Prospectus will not contain an untrue statement of a material fact or omit
      to state any material fact necessary to make the statements therein, in
      the light of the circumstances under which they were made, not misleading;

                  (v) furnish to each Holder and the Initial Purchaser in
      connection with such exchange or sale, if any, before filing with the
      Commission, copies of any Registration Statement or any Prospectus
      included therein or any amendments or supplements to any such Registration
      Statement or Prospectus (including all documents incorporated by reference
      after the initial filing of such Registration Statement), which documents
      will be subject to the review and comment of such Persons in connection
      with such sale, if any, for a period of at least five Business Days, and
      the Company will not file any such Registration Statement or Prospectus or
      any amendment or supplement to any such Registration Statement or
      Prospectus (including all such documents incorporated by reference) to
      which such Persons shall reasonably object within five Business Days after
      the receipt thereof. Such Person shall be deemed to have reasonably
      objected to such filing if such Registration Statement, amendment,
      Prospectus or supplement, as applicable, as proposed to be filed, contains
      a material misstatement or omission or fails to comply with the applicable
      requirements of the Act;

                  (vi) promptly prior to the filing of any document that is to
      be incorporated by reference into a Registration Statement or Prospectus,
      provide copies of such document to each Holder and the Initial Purchaser
      in connection with such exchange or sale, if any, make the Company's and
      the Guarantors' representatives available for discussion of such document
      and other customary due diligence matters, and include such information in
      such document prior to the filing thereof as such Persons may reasonably
      request;

                  (vii) make available, at reasonable times, for inspection by
      each selling Holder and the Initial Purchaser and any attorney or
      accountant retained by such Persons, all financial and other records,
      pertinent corporate documents of the Company and the Guarantors and cause
      the Company's and the Guarantors' officers, directors and employees to
      supply all information reasonably requested by any such Persons, attorney
      or accountant in connection with such Registration Statement or any
      post-effective amendment thereto subsequent to the filing thereof and
      prior to its effectiveness;

                  (viii) if requested by any Holders in connection with such
      exchange or sale or the Initial Purchaser, promptly include in any
      Registration Statement or Prospectus, pursuant to a 

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      supplement or post-effective amendment if necessary, such information as
      such selling Persons may reasonably request to have included therein,
      including, without limitation, information relating to the "Plan of
      Distribution" of the Transfer Restricted Securities and the use of the
      Registration Statement or Prospectus for market making activities; and
      make all required filings of such Prospectus supplement or post-effective
      amendment as soon as practicable after the Company is notified of the
      matters to be included in such Prospectus supplement or post-effective
      amendment;

                  (ix) furnish to each selling Holder in connection with such
      exchange or sale and the Initial Purchaser without charge, at least one
      copy of the Registration Statement, as first filed with the Commission,
      and of each amendment thereto, including all documents incorporated by
      reference therein and all exhibits (including exhibits incorporated
      therein by reference);

                  (x) deliver to each selling Holder and the Initial Purchaser
      without charge, as many copies of the Prospectus (including each
      preliminary prospectus) and any amendment or supplement thereto as such
      Persons reasonably may request; the Company and the Guarantors hereby
      consent to the use (in accordance with law) of the Prospectus and any
      amendment or supplement thereto by each selling Person in connection with
      the offering and the sale of the Transfer Restricted Securities covered by
      the Prospectus or any amendment or supplement thereto and all market
      making activities of the Initial Purchaser, as the case may be;

                  (xi) upon the request of any Holder, enter into such customary
      agreements (including underwriting agreements) and make such reasonable
      representations and warranties and take all such other actions in
      connection therewith in order to expedite or facilitate the disposition of
      the Transfer Restricted Securities pursuant to any applicable Registration
      Statement contemplated by this Agreement as may be reasonably requested by
      any Holder in connection with any sale or resale pursuant to any
      applicable Registration Statement. In such connection , and also in
      connection with market making activities by the Initial Purchaser, the
      Company and the Guarantors shall:

                  (A) upon request of such Person, furnish (or in the case of
            paragraphs (2) and (3), use its best efforts to cause to be
            furnished) to each such Person, upon Consummation of the Exchange
            Offer or upon the effectiveness of the Shelf Registration Statement,
            as the case may be:

                        (1) a certificate, dated such date, signed on behalf of
                  the Company and each Guarantor by (x) the President or any
                  Vice President and (y) a principal financial or accounting
                  officer of the Company and such Guarantor, confirming, as of
                  the date thereof, the matters set forth in paragraphs (a)
                  through (d) of Section 9 of the Purchase Agreement and such
                  other similar matters as such Person may reasonably request;

                        (2) an opinion, dated the date of Consummation of the
                  Exchange Offer or the date of effectiveness of the Shelf
                  Registration Statement, as the case may be, of counsel for the
                  Company and the Guarantors covering matters similar to those
                  set forth in paragraph (c) of Section 9 of the Purchase
                  Agreement and such other matter as such Person may reasonably
                  request, and in any event including a statement to the effect
                  that such counsel has participated in conferences with
                  officers and other representatives of the Company and the 
                  Guarantors, representatives of the 
 
                                      -10-
   12


                  independent public accountants for the Company and the
                  Guarantors and has considered the matters required to be
                  stated therein and the statements contained therein, although
                  such counsel has not independently verified the accuracy,
                  completeness or fairness of such statements; and that such
                  counsel advises that, on the basis of the foregoing, no facts
                  came to such counsel's attention that caused such counsel to
                  believe that the applicable Registration Statement, at the
                  time such Registration Statement or any post-effective
                  amendment thereto became effective and, in the case of the
                  Exchange Offer Registration Statement, as of the date of
                  Consummation of the Exchange Offer, contained an untrue
                  statement of a material fact or omitted to state a material
                  fact required to be stated therein or necessary to make the
                  statements therein not misleading, or that the Prospectus
                  contained in such Registration Statement as of its date and,
                  in the case of the opinion dated the date of Consummation of
                  the Exchange Offer, as of the date of Consummation, contained
                  an untrue statement of a material fact or omitted to state a
                  material fact necessary in order to make the statements
                  therein, in the light of the circumstances under which they
                  were made, not misleading. Without limiting the foregoing,
                  such counsel may state further that such counsel assumes no
                  responsibility for, and has not independently verified, the
                  accuracy, completeness or fairness of the financial
                  statements, notes and schedules and other financial data
                  included in any Registration Statement contemplated by this
                  Agreement or the related Prospectus; and

                        (3) a customary comfort letter, dated the date of
                  Consummation of the Exchange Offer, or as of the date of
                  effectiveness of the Shelf Registration Statement, as the case
                  may be, from the Company's independent accountants, in the
                  customary form and covering matters of the type customarily
                  covered in comfort letters to underwriters in connection with
                  underwritten offerings, and affirming the matters set forth in
                  the comfort letters delivered pursuant to Section 9(g) of the
                  Purchase Agreement; and

                  (B) deliver such other documents and certificates as may be
            reasonably requested by such Persons to evidence compliance with
            clause (A) above and with any customary conditions contained in the
            any agreement entered into by the Company and the Guarantors
            pursuant to this clause (xi);

                  (xii) prior to any public offering of Transfer Restricted
      Securities, cooperate with the selling Holders and their counsel in
      connection with the registration and qualification of the Transfer
      Restricted Securities under the securities or Blue Sky laws of such
      jurisdictions as the selling Holders may reasonably request and do any and
      all other acts or things necessary or advisable to enable the disposition
      in such jurisdictions of the Transfer Restricted Securities covered by the
      applicable Registration Statement; provided, however, that neither the
      Company nor any Guarantor shall be required to register or qualify as a
      foreign corporation where it is not now so qualified or to take any action
      that would subject it to the service of process in suits or to taxation,
      other than as to matters and transactions relating to the Registration
      Statement, in any jurisdiction where it is not now so subject;

                  (xiii) in connection with any sale of Transfer Restricted
      Securities that will result in such securities no longer being Transfer
      Restricted Securities, cooperate with the Holders to 

                                     -11-

   13

      facilitate the timely preparation and delivery of certificates
      representing Transfer Restricted Securities to be sold and not bearing any
      restrictive legends; and to register such Transfer Restricted Securities
      in such denominations and such names as the selling Holders may request at
      least two Business Days prior to such sale of Transfer Restricted
      Securities;

                  (xiv) use their respective best efforts to cause the
      disposition of the Transfer Restricted Securities covered by the
      Registration Statement to be registered with or approved by such other
      governmental agencies or authorities as may be necessary to enable the
      seller or sellers thereof to consummate the disposition of such Transfer
      Restricted Securities, subject to the proviso contained in clause (xii)
      above;

                  (xv) provide a CUSIP number for all Transfer Restricted
      Securities not later than the effective date of a Registration Statement
      covering such Transfer Restricted Securities and provide the Trustee under
      the Indenture with printed certificates for the Transfer Restricted
      Securities which are in a form eligible for deposit with the Depository
      Trust Company;

                  (xvi) otherwise use their respective best efforts to comply
      with all applicable rules and regulations of the Commission, and make
      generally available to its security holders with regard to any applicable
      Registration Statement, as soon as practicable, a consolidated earnings
      statement meeting the requirements of Rule 158 (which need not be audited)
      covering a twelve-month period beginning after the effective date of the
      Registration Statement (as such term is defined in paragraph (c) of Rule
      158 under the Act);

                  (xvii) cause the Indenture to be qualified under the TIA not
      later than the effective date of the first Registration Statement required
      by this Agreement and, in connection therewith, cooperate with the Trustee
      and the Holders to effect such changes to the Indenture as may be required
      for such Indenture to be so qualified in accordance with the terms of the
      TIA; and execute and use its best efforts to cause the Trustee to execute,
      all documents that may be required to effect such changes and all other
      forms and documents required to be filed with the Commission to enable
      such Indenture to be so qualified in a timely manner; and

                  (xviii) provide promptly to each Holder and the Initial 
      Purchaser, upon request, each document filed with the Commission pursuant
      to the requirements of Section 13 or Section 15(d) of the Exchange Act.

            (d) Restrictions on Holders. Each Holder agrees by acquisition of a
Transfer Restricted Security and the Initial Purchaser agrees that, upon receipt
of the notice referred to in Section 6(c)(iii)(C) or any notice from the Company
of the existence of any fact of the kind described in Section 6(c)(iii)(D)
hereof (in each case, a "SUSPENSION NOTICE"), such Person will forthwith
discontinue disposition of Transfer Restricted Securities pursuant to the
applicable Registration Statement until (i) such Person has received copies of
the supplemented or amended Prospectus contemplated by Section 6(c)(iv) hereof,
or (ii) such Person is advised in writing by the Company that the use of the
Prospectus may be resumed, and has received copies of any additional or
supplemental filings that are incorporated by reference in the Prospectus (in
each case, the "RECOMMENCEMENT DATE"). Each Person receiving a Suspension Notice
hereby agrees that it will either (i) destroy any Prospectuses, other than
permanent file copies, then in such Person's possession which have been replaced
by the Company with more recently dated Prospectuses or (ii) deliver to the
Company (at the Company's expense) all copies, other than permanent file copies,
then in such Person's possession of the Prospectus covering such Transfer
Restricted Securities that was current at the time of receipt of the 


                                     -12-
   14

Suspension Notice. The time period regarding the effectiveness of such
Registration Statement set forth in Section 3 or 4 hereof, as applicable, shall
be extended by a number of days equal to the number of days in the period from
and including the date of delivery of the Suspension Notice to the date of
delivery of the Recommencement Date.


SECTION 7.  REGISTRATION EXPENSES

            (a) All expenses incident to the Company's and the Guarantors'
performance of or compliance with this Agreement will be borne by the Company,
regardless of whether a Registration Statement becomes effective, including
without limitation: (i) all registration and filing fees and expenses; (ii) all
fees and expenses of compliance with federal securities and state Blue Sky or
securities laws; (iii) all expenses of printing (including printing certificates
for the New Senior Notes to be issued in the Exchange Offer and printing of
Prospectuses whether for exchanges, sales, market making or otherwise),
messenger and delivery services and telephone; (iv) all fees and disbursements
of counsel for the Company, and counsel for the Guarantors and the Holders of
Transfer Restricted Securities in connection with any Shelf Registration
Statement; (v) all application and filing fees in connection with listing the
New Senior Notes on a national securities exchange or automated quotation system
pursuant to the requirements hereof; and (vi) all fees and disbursements of
independent certified public accountants of the Company and the Guarantors
(including the expenses of any special audit and comfort letters required by or
incident to such performance).

            The Company will, in any event, bear its and the Guarantors'
internal expenses (including, without limitation, all salaries and expenses of
its officers and employees performing legal or accounting duties), the expenses
of any annual audit and the fees and expenses of any Person, including special
experts, retained by the Company or the Guarantors.

            (b) In connection with any Shelf Registration Statement, the Company
and the Guarantors will reimburse the Holders of Transfer Restricted Securities
who are selling or reselling Senior Notes or New Senior Notes pursuant to the
"Plan of Distribution" contained in the Shelf Registration Statement, as
applicable, for the reasonable fees and disbursements of not more than one
counsel, who shall be Wilson Sonsini Goodrich & Rosati, Professional
Corporation, unless another firm shall be chosen by the Holders of a majority in
principal amount of the Transfer Restricted Securities for whose benefit such
Registration Statement is being prepared.


SECTION 8.  INDEMNIFICATION

            (a) The Company and the Guarantors agree, jointly and severally, to
indemnify and hold harmless each Holder, the Initial Purchaser, their respective
directors, officers and each Person, if any, who controls such Persons (within
the meaning of Section 15 of the Act or Section 20 of the Exchange Act), from
and against any and all losses, claims, damages, liabilities, judgments,
(including without limitation, any legal or other expenses incurred in
connection with investigating or defending any matter, including any action that
could give rise to any such losses, claims, damages, liabilities or judgments)
caused by any untrue statement or alleged untrue statement of a material fact
contained in any Registration Statement, preliminary prospectus or Prospectus
(or any amendment or supplement thereto) provided by the Company to any holder
or any prospective purchaser (who becomes a holder) of New Senior Notes or
registered Senior Notes, or caused by any omission or alleged omission to state
therein a material fact required to be stated therein or necessary to 

                                      -13-
   15

make the statements therein not misleading, except insofar as such losses,
claims, damages, liabilities or judgments are caused by an untrue statement or
omission or alleged untrue statement or omission that is based upon information
relating to any of the Holders furnished in writing to the Company by any of the
Holders.

            (b) Each Holder of Transfer Restricted Securities and the Initial 
Purchaser agrees, severally and not jointly, to indemnify and hold harmless the
Company and the Guarantors, and their respective directors and officers, and
each person, if any, who controls (within the meaning of Section 15 of the Act
or Section 20 of the Exchange Act) the Company, or the Guarantors to the same
extent as the foregoing indemnity from the Company and the Guarantors set forth
in Section 8(a) above, but only with reference to information relating to such
Person furnished in writing to the Company by such Person expressly for use in
any Registration Statement. In no event shall any Person be liable or
responsible for any amount in excess of the amount by which the total amount
received by such Person with respect to its sale of Transfer Restricted
Securities pursuant to a Registration Statement exceeds (i) the amount paid by
such Person for such Transfer Restricted Securities and (ii) the amount of any
damages that such Person has otherwise been required to pay by reason of such
untrue or alleged untrue statement or omission or alleged omission.

            (c) In case any action shall be commenced involving any person in
respect of which indemnity may be sought pursuant to Section 8(a) or 8(b) (the
"INDEMNIFIED PARTY"), the indemnified party shall promptly notify the person
against whom such indemnity may be sought (the "INDEMNIFYING PERSON") in writing
and the indemnifying party shall assume the defense of such action, including
the employment of counsel reasonably satisfactory to the indemnified party and
the payment of all fees and expenses of such counsel, as incurred (except that
in the case of any action in respect of which indemnity may be sought pursuant
to both Sections 8(a) and 8(b), a Holder shall not be required to assume the
defense of such action pursuant to this Section 8(c), but may employ separate
counsel and participate in the defense thereof, but the fees and expenses of
such counsel, except as provided below, shall be at the expense of the Holder
and/or the Initial Purchaser). Any indemnified party shall have the right to
employ separate counsel in any such action and participate in the defense
thereof, but the fees and expenses of such counsel shall be at the expense of
the indemnified party unless (i) the employment of such counsel shall have been
specifically authorized in writing by the indemnifying party, (ii) the
indemnifying party shall have failed to assume the defense of such action or
employ counsel reasonably satisfactory to the indemnified party or (iii) the
named parties to any such action (including any impleaded parties) include both
the indemnified party and the indemnifying party, and the indemnified party
shall have been advised by such counsel that there may be one or more legal
defenses available to it which are different from or additional to those
available to the indemnifying party (in which case the indemnifying party shall
not have the right to assume the defense of such action on behalf of the
indemnified party). In any such case, the indemnifying party shall not, in
connection with any one action or separate but substantially similar or related
actions in the same jurisdiction arising out of the same general allegations or
circumstances, be liable for the fees and expenses of more than one separate
firm of attorneys (in addition to any local counsel) for all indemnified parties
and all such fees and expenses shall be reimbursed as they are incurred. Such
firm shall be designated in writing by a majority of the Holders and/or the
Initial Purchaser, in the case of the parties indemnified pursuant to Section
8(a), and by the Company, in the case of parties indemnified pursuant to Section
8(b). The indemnifying party shall indemnify and hold harmless the indemnified
party from and against any and all losses, claims, damages, liabilities and
judgments by reason of any settlement of any action (i) effected with its
written consent or (ii) effected without its written consent if the settlement
is entered into more than twenty business days after the indemnifying party
shall have received a request from the indemnified party for reimbursement for
the fees and expenses of counsel (in any case where such fees and expenses are
at the expense of the indemnifying party) and, prior to the date of such

                                      -14-
   16

settlement, the indemnifying party shall have failed to comply with such
reimbursement request. No indemnifying party shall, without the prior written
consent of the indemnified party, effect any settlement or compromise of, or
consent to the entry of judgment with respect to, any pending or threatened
action in respect of which the indemnified party is or could have been a party
and indemnity or contribution may be or could have been sought hereunder by the
indemnified party, unless such settlement, compromise or judgment (i) includes
an unconditional release of the indemnified party from all liability on claims
that are or could have been the subject matter of such action and (ii) does not
include a statement as to or an admission of fault, culpability or a failure to
act, by or on behalf of the indemnified party.

            (d) To the extent that the indemnification provided for in this
Section 8 is unavailable to an indemnified party in respect of any losses,
claims, damages, liabilities or judgments referred to therein, then each
indemnifying party, in lieu of indemnifying such indemnified party, shall
contribute to the amount paid or payable by such indemnified party as a result
of such losses, claims, damages, liabilities or judgments (i) in such proportion
as is appropriate to reflect the relative benefits received by the Company and
the Guarantors, on the one hand, and the Holders and the Initial Purchaser, on
the other hand, from their sale of Transfer Restricted Securities or (ii) if the
allocation provided by clause 8(d)(i) is not permitted by applicable law, in
such proportion as is appropriate to reflect not only the relative benefits
referred to in clause 8(d)(i) above but also the relative fault of the Company
and the Guarantors, on the one hand, and of the Holder and the Initial 
Purchaser, on the other hand, in connection with the statements or omissions
which resulted in such losses, claims, damages, liabilities or judgments, as
well as any other relevant equitable considerations. The relative fault of the
Company and the Guarantors, on the one hand, and of the Holder and the Initial 
Purchaser, on the other hand, shall be determined by reference to, among other
things, whether the untrue or alleged untrue statement of a material fact or the
omission or alleged omission to state a material fact relates to information
supplied by the Company or such Guarantor, on the one hand, or by the Holder and
the Initial Purchaser, on the other hand, and the parties' relative intent,
knowledge, access to information and opportunity to correct or prevent such
statement or omission. The amount paid or payable by a party as a result of the
losses, claims, damages, liabilities and judgments referred to above shall be
deemed to include, subject to the limitations set forth in the second paragraph
of Section 8(a), any legal or other fees or expenses reasonably incurred by such
party in connection with investigating or defending any action or claim.

            The Company, the Guarantors and each Holder and the Initial 
Purchaser agree that it would not be just and equitable if contribution pursuant
to this Section 8(d) were determined by pro rata allocation (even if the Holders
were treated as one entity for such purpose) or by any other method of
allocation which does not take account of the equitable considerations referred
to in the immediately preceding paragraph. The amount paid or payable by an
indemnified party as a result of the losses, claims, damages, liabilities or
judgments referred to in the immediately preceding paragraph shall be deemed to
include, subject to the limitations set forth above, any legal or other expenses
reasonably incurred by such indemnified party in connection with investigating
or defending any matter, including any action that could have given rise to such
losses, claims, damages, liabilities or judgments. Notwithstanding the
provisions of this Section 8, no Holder nor the Initial Purchaser, nor their
respective directors, officers or any Person, if any, who controls such Person
shall be required to contribute, in the aggregate, any amount in excess of the
amount by which the total received by such Holder with respect to the sale of
its Transfer Restricted Securities pursuant to a Registration Statement exceeds
the sum of (A) the amount paid by such Holder and the Initial Purchaser for such
Transfer Restricted Securities plus (B) the amount of any damages which such
Holder and the Initial Purchaser has otherwise been required to pay by reason of
such untrue or alleged untrue statement or omission or alleged omission. No
person guilty of fraudulent misrepresentation (within the meaning of Section
11(f) of the Act) shall be entitled to contribution from any person who was not
guilty of such fraudulent misrepresentation. 

                                      -15-
   17

The Holders' and the Initial Purchaser, obligations to contribute pursuant to
this Section 8(c) are several in proportion to the respective principal amount
of Transfer Restricted Securities held by each Holder or the Initial Purchaser,
hereunder and not joint.


SECTION 9.  RULE 144A AND RULE 144

            The Company and each Guarantor agrees with each Holder, for so long
as any Transfer Restricted Securities remain outstanding and during any period
in which the Company or such Guarantor (i) is not subject to Section 13 or 15(d)
of the Exchange Act, to make available, upon request of any Holder of Transfer
Restricted Securities, to any Holder or beneficial owner of Transfer Restricted
Securities in connection with any sale thereof and any prospective purchaser of
such Transfer Restricted Securities designated by such Holder or beneficial
owner, the information required by Rule 144A(d)(4) under the Act in order to
permit resales of such Transfer Restricted Securities pursuant to Rule 144A, and
(ii) is subject to Section 13 or 15 (d) of the Exchange Act, to make all filings
required thereby in a timely manner in order to permit resales of such Transfer
Restricted Securities pursuant to Rule 144.


SECTION 10. MISCELLANEOUS

            (a) No Inconsistent Agreements. Neither the Company nor any
Guarantor will, on or after the date of this Agreement, enter into any agreement
with respect to its securities that is inconsistent with the rights granted to
the Holders in this Agreement or otherwise conflicts with the provisions hereof.
Neither the Company nor any Guarantor has previously entered into any agreement
granting any registration rights with respect to its securities to any Person
other than pursuant to that certain Securityholders Agreement dated November 23,
1994. The rights granted to the Holders hereunder do not in any way conflict
with and are not inconsistent with the rights granted to the holders of the
Company's and the Guarantors' securities under any agreement in effect on the
date hereof.

            (b) Amendments and Waivers. The provisions of this Agreement may not
be amended, modified or supplemented, and waivers or consents to or departures
from the provisions hereof may not be given unless (i) in the case of Section 5
hereof and this Section 10(b)(i), the Company has obtained the written consent
of Holders of all outstanding Transfer Restricted Securities and (ii) in the
case of all other provisions hereof, the Company has obtained the written
consent of Holders of a majority of the outstanding principal amount of Transfer
Restricted Securities (excluding Transfer Restricted Securities held by the
Company or its Affiliates). Notwithstanding the foregoing, a waiver or consent
to departure from the provisions hereof that relates exclusively to the rights
of Holders whose securities are being tendered pursuant to the Exchange Offer
and that does not affect directly or indirectly the rights of other Holders
whose securities are not being tendered pursuant to such Exchange Offer may be
given by the Holders of a majority of the outstanding principal amount of
Transfer Restricted Securities subject to such Exchange Offer.

            (c) Third Party Beneficiary. The Holders shall be third party
beneficiaries to the agreements made hereunder between the Company and the
Guarantors, on the one hand, and the Initial Purchaser, on the other hand, and
shall have the right to enforce such agreements directly to the extent they may
deem such enforcement necessary or advisable to protect its rights or the rights
of Holders hereunder.


                                      -16-
   18

            (d) Notices. All notices and other communications provided for or
permitted hereunder shall be made in writing by hand-delivery, first-class mail
(registered or certified, return receipt requested), telex, telecopier, or air
courier guaranteeing overnight delivery:

                  (i) if to a Holder, at the address set forth on the records of
      the Registrar under the Indenture, with a copy to the Registrar under the
      Indenture; and

                  (ii) if to the Company or the Guarantors:

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


                       With a copy to:

                       Brobeck, Phleger & Harrison LLP
                       4675 MacArthur Court, #1000
                       Newport Beach, CA 92660-1846
                       Telecopier No.: (714) 752-7535
                       Attention: Greg T. Williams, Esq.

            All such notices and communications 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 on the next business day, if
timely delivered to an air courier guaranteeing overnight delivery.

            Copies of all such notices, demands or other communications shall be
concurrently delivered by the Person giving the same to the Trustee at the
address specified in the Indenture.

            Upon the date of filing of the Exchange Offer or a Shelf
Registration Statement, as the case may be, notice shall be delivered to
Donaldson, Lufkin & Jenrette Securities Corporation, the Initial Purchaser (in
the form attached hereto as Exhibit A) and shall be addressed to: Attention:
Louise Guarneri (Compliance Department), 277 Park Avenue, New York, New York
10172.

            (e) Successors and Assigns. This Agreement shall inure to the
benefit of and be binding upon the successors and assigns of each of the
parties, including without limitation and without the need for an express
assignment, subsequent Holders of Transfer Restricted Securities; provided, that
nothing herein shall be deemed to permit any assignment, transfer or other
disposition of Transfer Restricted Securities in violation of the terms hereof
or of the Purchase Agreement or the Indenture. If any transferee of any Holder
shall acquire Transfer Restricted Securities in any manner, whether by operation
of law or otherwise, such Transfer Restricted Securities shall be held subject
to all of the terms of this Agreement, and by taking and holding such Transfer
Restricted Securities such Person shall be conclusively deemed to have agreed to
be bound by and to perform all of the terms and provisions of this Agreement,
including the restrictions on resale set forth in this Agreement and, if
applicable, the Purchase Agreement, and such Person shall be entitled to receive
the benefits hereof.

                                      -17-
   19

            (f) Counterparts. This Agreement may be executed in any number of
counterparts and by the parties hereto in separate counterparts, each of which
when so executed shall be deemed to be an original and all of which taken
together shall constitute one and the same agreement.

            (g) Headings. The headings in this Agreement are for convenience of
reference only and shall not limit or otherwise affect the meaning hereof.

            (h) Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED
IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO THE
CONFLICT OF LAW RULES THEREOF.

            (i) Severability. In the event that any one or more of the
provisions contained herein, or the application thereof in any circumstance, is
held invalid, illegal or unenforceable, the validity, legality and
enforceability of any such provision in every other respect and of the remaining
provisions contained herein shall not be affected or impaired thereby.

            (j) Entire Agreement. This Agreement is intended by the parties as a
final expression of their agreement and intended to be a complete and exclusive
statement of the agreement and understanding of the parties hereto in respect of
the subject matter contained herein. There are no restrictions, promises,
warranties or undertakings, other than those set forth or referred to herein
with respect to the registration rights granted with respect to the Transfer
Restricted Securities. This Agreement supersedes all prior agreements and
understandings between the parties with respect to such subject matter.




               [**remainder of page intentionally left blank**]

                                      -18-

   20


            IN WITNESS WHEREOF, the parties have executed this Agreement as of
the date first written above.

                                          PHASE METRICS, INC.


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

                                          HELIOS, INCORPORATED


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


                                          APPLIED ROBOTIC TECHNOLOGIES, INC.


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


                                          AIR BEARINGS, INCORPORATED


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


                                          SANTA BARBARA METRIC, INC.


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

DONALDSON, LUFKIN & JENRETTE
SECURITIES CORPORATION


By: /s/ Steven D. Smith
    ---------------------------------
    Name: Steven D. Smith
    Title: Senior Vice President


   21


                                    EXHIBIT A

                               NOTICE OF FILING OF
                    A/B EXCHANGE OFFER REGISTRATION STATEMENT


To:         Donaldson, Lufkin & Jenrette Securities Corporation
            277 Park Avenue
            New York, New York  10172
            Attention:  Louise Guarneri (Compliance Department)
            Fax: (212) 892-7272

From: Phase Metrics, Inc.
            10 3/4% Senior Notes due 2005

Date: ________________, 1998

      For your information only (NO ACTION REQUIRED):

      Today, ______________, 1998, we filed [an A/B Exchange Registration
Statement/a Shelf Registration Statement] with the Securities and Exchange
Commission. We currently expect this registration statement to be declared
effective within __ business days of the date hereof.



                                      -21-