FIRST AMENDMENT TO EXCHANGE AND MERGER AGREEMENT
                             AND STOCKHOLDERS AGREEMENT

     First Amendment, dated as of September 25,  1998, to the Exchange and
Merger Agreement, dated as of June 12, 1998 (the "Exchange Agreement"), among
Wavetek Corporation ("Wavetek"), Wandel & Goltermann Management Holding GmbH
("WG") and the stockholders listed on the signature pages thereto (the
"Stockholders") and the Stockholders Agreement, dated as of June 12, 1998 and
effective as of the Effective Time (the "Stockholders Agreement"), among Wavetek
and the Stockholders.

     WHEREAS, Wavetek, WG and the Stockholders have agreed to amend the Exchange
Agreement and the Stockholders Agreement to eliminate the formation of WG
Holding and the merger of WG Holding with Wavetek Corporation such that the
Exchange and the Merger constitute the same transaction and to make certain
other modifications to the provisions governing conditions to closing,
termination and closing date;

     NOW, THEREFORE, the parties hereto agree as follows:

     1.   Section 1.1(a) of the Exchange Agreement shall be amended to read in
its entirety as follows:

          (a)  At or before the Effective Time, each WG Stockholder shall
     transfer and assign to Wavetek (free and clear of all liabilities, liens,
     claims, pledges, security interests, charges or encumbrances, restrictions,
     title retention agreements, proxies or other voting arrangements, rights of
     first refusal, tag along or similar rights of any nature whatsoever (all of
     the foregoing collectively "Liens")) all the outstanding share capital of
     WG ("WG Interests"), with the right to all dividends not distributed prior
     to September 30, 1998, but without prejudice to Section 2.2(b), and at the
     Effective Time, Wavetek shall deliver to the WG Stockholders the number of
     shares of Wavetek Common Stock and the cash consideration set forth
     opposite the name of such WG Stockholder on Annex 1 (the "Exchange").  The
     aggregate number of shares of Wavetek Common Stock issued will be 8,317,464
     and the aggregate cash consideration to be paid to the WG Stockholders will
     be DM2 million.

     The revised Annex 1 attached to this First Amendment shall replace Annex 1
to the Exchange Agreement.

     2.   Section 1.1(c) of the Exchange Agreement shall be amended to read in
its entirety as follows:



          (c)  Although the Exchange and the Merger shall occur simultaneously,
     all such transactions shall be unwound and deemed not to have occurred
     unless all such transactions are consummated at or immediately prior to the
     Effective Time.

     3.   Section 1.2 of  the Exchange Agreement shall be amended to read in its
entirety as follows:

          SECTION 1.2.  PROCEDURES.  At the Effective Time, the WG Stockholders,
     on the one hand, and Wavetek, on the other hand, shall be parties to a
     notarial deed of a German or Swiss notary pursuant to which all outstanding
     WG Interests shall be transferred to Wavetek, such notarial deed to be
     substantially in the form of Annex 2 hereto (the "Notarial Deed"). 
     Simultaneously with the satisfaction of the condition precedent to the
     transfer of the WG Interests to Wavetek pursuant to the Notarial Deed (see
     Item 3 under the caption "Transfer of GmbH Shares" in the Notarial Deed),
     Wavetek shall deliver to each holder of WG Interests the cash consideration
     and a certificate or certificates representing the number of whole shares
     of Wavetek Common Stock which such holder has the right to receive in
     respect of the WG Interests pursuant to the provisions of Section 1.1 and
     this Section 1.2.  The WG Stockholders hereby authorize and direct Wavetek
     (i) to deliver possession of Wavetek share certificates to be issued by
     Wavetek to the WG Stockholders pursuant to Section 1.1 and this Section 1.2
     to WG's U.S. counsel, Rogers & Hardin, and (ii) to pay the aggregate cash
     consideration to be paid to the WG Stockholders pursuant to Section 1.1 and
     this Section 1.2 by wire transfer to such accounts designated by WG's
     German counsel, Norr, Stiefenhofer & Lutz.

     The revised Annex 2 attached to this First Amendment shall replace Annex 2
to the Exchange Agreement.

     4.   Section 1.3 of the Exchange Agreement shall be amended to read in its
entirety as follows:

          SECTION 1.3.  AMENDMENT TO WG STOCKHOLDER LOANS.  Immediately prior to
     the Effective Time, the existing WG stockholder loans (set forth in
     Annex 4) (the "WG Stockholder Loans") shall be increased and modified,
     whereupon the aggregate principal amount of WG Stockholder Loans shall be
     increased to an amount not less than DM14 million and not more than DM23
     million, the exact amount to be mutually agreed upon by WG and the WG
     Stockholders providing such loans prior to the Effective Time, and the
     interest rate and repayment terms shall be modified in the manner set forth
     on Annex 4-A attached hereto.  Annex 4-A attached to this Agreement shall
     be deemed incorporated in and attached to the Exchange Agreement.

                                     -2-


     5.   Section 1.4 of the Exchange Agreement shall be amended to read in its
entirety as follows:

          SECTION 1.4.  OPTION GRANTS.  At the Effective Time, (i) Wavetek's
     1992 Non-Qualified Employee Stock Option Plan, as amended, will be amended
     to increase the number of shares of Common Stock available for option
     grants thereunder from 663,160 shares to 1,320,232 and (ii) Wavetek shall
     reserve up to 558,055 options at the Effective Time for granting to WG
     employees, directors and new hires, of which 97,161 options shall be fully
     vested upon their grant; provided that such vested options shall not
     constitute more than 50% of the options held by any grantee and shall
     represent acceleration of the earliest vesting dates; provided, however,
     that the recipients of such options shall be determined by the Compensation
     Committee (as defined in the Stockholders Agreement).  The exercise price
     for such options shall be the fair market value of the shares of the
     Company at the Effective Time as determined pursuant to Section 1.6 hereof.

     6.   A new Section 1.6 shall be added to the Exchange Agreement to read as
follows:

          SECTION 1.6.  VALUATION OF WAVETEK.  Promptly following the
     Effective Time, a valuation of Wavetek shall be performed for purchase
     accounting purposes and in order to establish the fair market value of the
     Company at the Effective Time for purposes of pricing the options granted
     pursuant to Section 1.4 hereof.  To the extent that such firms are
     available to perform such evaluation without impairing their independence
     as auditors of Wavetek and WG and upon terms acceptable to the Executive
     Committee (as defined in the Stockholders Agreement), then the public
     accounting firm of Ernst & Young shall perform such valuation, such
     valuation to be reviewed and approved by the public accounting firm of
     Arthur Andersen.  Otherwise, such valuation shall be performed by an
     independent appraiser or evaluation expert selected by the Executive
     Committee. 

     7.   Section 2.2(b) of the Exchange Agreement shall be amended to read in
its entirety as follows:

          (b)  make, declare or pay any dividend or make any other distribution
     on, or directly or indirectly redeem, purchase or otherwise acquire, any
     shares of its capital stock or any securities or obligations convertible
     into or exchangeable for any shares of its capital stock, or grant any
     stock appreciation rights, options or any right to acquire any shares of
     its capital stock, except for dividends paid by any wholly owned subsidiary
     to WG or Wavetek, as applicable, or any of its 

                                      -3-


     wholly owned subsidiaries; provided, however, that (i) WG may pay a 
     dividend to its stockholders in an amount not to exceed DM3 million; 
     (ii) WG may make a payment of DM205,000 to HF and a payment of 
     DM246,000 to Frank Goltermann in consideration of their agreement to 
     amend their respective WG Stockholder Loans to WG in accordance with 
     Section 1.3 hereof; (iii) WG may pay to or for the benefit of Albrecht 
     Wandel DM1,124,080 in consideration of the prepayment of a pension/life 
     insurance obligation of WG to Albrecht Wandel; and (iv) Wavetek may 
     purchase shares of its capital stock and options from its employees who 
     terminate employment with Wavetek in a manner consistent with past 
     practice;

     8.   Section 2.2 of the Exchange Agreement shall be amended by the addition
of the following new subsection (k):
     
          (k)  Notwithstanding anything in this Section 2.2 to contrary:  (i) to
     the extent that Wavetek, WG or their respective subsidiaries are expressly
     permitted to take any action pursuant to any subparagraph of this
     Section 2.2, such action shall not be deemed prohibited by any other
     subparagraph of this Section 2.2, (ii) WG and its subsidiaries shall be
     permitted to effect the dividend of all of the outstanding ownership
     interests in Wandel & Goltermann A.T.E. Systems, Inc. from the WG
     subsidiary or subsidiaries holding such entity up to WG and (iii) WG and
     its subsidiaries shall be entitled to enter into a sale/leaseback
     transaction pursuant to which certain property held by WG and/or its
     subsidiaries may be purchased by Albrecht Wandel or his affiliates and
     leased back to WG and/or its subsidiaries, such sale/leaseback arrangements
     to be on such terms as may be approved on behalf of the Company by Peter
     Wagner and Dr. Terrence J. Gooding.

     9.   Section 2.3(a) of the Exchange Agreement shall be amended to read in
its entirety as follows:
     
          (a)  sell, transfer, mortgage, encumber or otherwise dispose of any WG
     Interests owned or held by it other than (i) in connection with the Merger
     or the Exchange, (ii) to any executive officer of WG or any other WG
     Stockholder or (iii) in a Permitted Transfer (as defined in the
     Stockholders Agreement, assuming the Stockholders Agreement were binding at
     the time of such transfer), provided that such transferee becomes a party
     to and agrees to be bound by each of this Agreement and the Stockholders
     Agreement as a condition to such transfer, or take any action that would
     adjust, split, combine or reclassify any capital stock of WG or issue any
     additional shares of capital stock of WG except as contemplated by Section
     4.9 hereof;

                                      -4-


     10.  The phrase "at or immediately" in the first sentence of Section 2.5(a)
of the Exchange Agreement shall be replaced with the phrase "as promptly as
practicable".

     11.  A new Section 2.5(c) shall be added to the Exchange Agreement to read
as follows:
          (c)  In the event that an Initial Public Offering is not consummated
     by March 31, 1999, the Company agrees to use its reasonable best efforts to
     effectuate a transaction to provide liquidity for its stockholders.

     12.  The following sentence shall be added to the end of Section 4.9 of the
Exchange Agreement:

          WG shall be entitled to make a cash payment not to exceed DM 1.5
     million to acquire such capital stock.

     13.  Section 4.10 of the Exchange Agreement shall be deleted in its
entirety.

     14.  Section 5.1(f) of the Exchange Agreement shall be deleted in its
entirety.

     15.  Section 7.1 of the Exchange Agreement shall be amended to read in its
entirety as follows:

          SECTION 7.1.  EFFECTIVE DATE AND EFFECTIVE TIME.  On September 30,
     1998, a closing of the Exchange, the Merger and the transactions
     contemplated hereby shall be held at the offices of Sullivan & Cromwell,
     1888 Century Park East, Los Angeles, California 90067 at 7:00 a.m., Los
     Angeles time, or such other times and locations as may be agreed by Wavetek
     and WG, whereupon the deliveries and proceedings contemplated hereby,
     including, without limitation, those matters described in Article I hereof,
     shall be effected.  The date of such closing is herein called the
     "Effective Date".  The Merger and Exchange shall become effective upon the
     satisfaction of the condition precedent to the transfer of the WG Interests
     to Wavetek pursuant to the Notarial Deed (see Item 3 under the caption
     "Transfer of GmbH Shares" in the Notarial Deed) (the "Effective Time").

     16.  Section 2.1(h) of the Stockholders Agreement shall be amended to read
in its entirety as follows:

          (h)  At the Effective Time, Terence J. Gooding and Albrecht Wandel
     will be Co-Chairmen of the Board (with the roles and responsibilities set
     forth on Annex 1) and the Chief Executive Officer shall be Peter Wagner
     (with the roles and responsibilities set forth on Annex 2).  The term
     "Chairman of the Board" 

                                      -5-


     used in this Agreement shall refer to (i) each of the Co-Chairmen of the 
     Board if two individuals serve in such capacity and (ii) the Chairman of 
     Board if only one individual serves in such capacity.  The Company shall 
     employ Peter Wagner as Chief Executive Officer pursuant to an employment 
     agreement agreed to between the Company and such individual prior to the 
     Effective Time.  Terence J. Gooding shall not be an executive officer of 
     the Company and shall no longer serve as Co-Chairman of the Board 
     following the earlier of (i) six months following the consummation of the 
     Initial Public Offering and (ii) September 30, 1999.

     17.  Two new sentences will be added to the end of Section 2.5 of the
Stockholders Agreement as follows:

          Notwithstanding the foregoing, if the Stockholders other than Gooding,
     the DLJ Investors, GEI and any other "Principals" and their "Related
     Parties" (such terms as defined in the Indenture, dated as of June 11,
     1997, among the Company, Wavetek U.S. Inc. and The Bank of New York) (such
     Stockholders, including for this purpose any other person that with such
     Stockholders may constitute a "person" as such term is used in Section
     13(d)(3) of the Exchange Act, the "Limited Holders") hold in excess of
     49.9% of the outstanding shares of the Common Stock of the Company at any
     particular time, then at such time this Section 2.5 (i) shall be operative
     as to all shares of Common Stock held by any Stockholder that is not a
     Limited Holder and (ii) shall relate only to a fraction of the shares of
     the Common Stock then held by any such Limited Holder, the numerator of
     such fraction being the product of .499 times the total number of shares of
     Common Stock of the Company outstanding at such time and the denominator of
     such fraction being the total number of shares of Common Stock then held by
     all Limited Holders.  For example, as of the Effective Time, this Section
     2.5 shall relate only to 2,314,334*((.499*13,202,324) DIVIDED BY 
     (9,247,074)) = 1,648,818 of the shares held by Albrecht and Renate Wandel.

     18.  The following sentence shall be added to the beginning of Section 3.1
of the Stockholders Agreement.

     Prior to the consummation of an Initial Public Offering, no Stockholder may
     Transfer its Shares to any Person unless as a condition of Transfer, such
     Person, prior or concurrently with such Transfer, undertakes by a written
     agreement in substantially the form of Annex 3, to be bound by the terms of
     this Agreement to the same extent and in the same manner as the
     Transferring Stockholder.

     19.  Section 3.3 of the Stockholders Agreement shall be amended by
inserting "(other than those set forth in Section 3.1)" after "Transfer of
Shares" the first time it 

                                      -6-


appears and Section 3.4 of the Stockholders Agreement shall be amended by 
inserting "(other than those set forth in Section 3.1)" after "Transfer of 
Shares". 

     20.  New Section 4.1(d) shall be added to the Stockholders Agreement to
read as follows:

          (d)  Notwithstanding the foregoing provisions of this Section 4.1, no
     Stockholder (including for this purpose any other person that may
     constitute a "person" as such term is used in Section 13(d)(3) of the
     Exchange Act) may acquire more than 49.9% of the outstanding Shares
     pursuant to the Right of First Offer.

     21.  The first sentence of Section 4.3 of the Stockholders Agreement shall
be amended to read as follows:

     Prior to and after the Initial Public Offering, subject to Section 4.1, if
     the Stockholders collectively own more than 40% of the issued and
     outstanding Shares and if Stockholders owning or holding beneficial
     ownership of at least 75% of all issued and outstanding Shares held by
     Stockholders (the "PROPOSING STOCKHOLDERS") elect to sell all of such
     Stockholders' Shares to any Person not a party to this Agreement for
     consideration consisting solely of cash or cash equivalent, such Proposing
     Stockholders shall have the right to require the Transfer of all other
     Stockholders' Shares to such Person at the same price and on the same terms
     and conditions as such Proposing Stockholders (the "Bring-Along Right").

     22.  New Sections 4.4 and 4.5 shall be added to the Stockholders Agreement
to read as follows:

          4.4  CERTAIN PREEMPTIVE RIGHTS.  If, prior to an Initial Public
     Offering, the Company proposes to issue, sell, or grant Common Stock or
     Rights, then the Company shall, no later than 30 days prior to the
     consummation of such issuance, give written notice to all Stockholders of
     such proposed issuance. Such notice shall describe the proposed issuance
     and contain an offer to each of the Stockholders to sell to such
     Stockholder, at the same price and on the same terms and conditions as
     offered to the proposed purchasers, such Stockholder's pro rata portion
     (which shall be a percentage equal to the percentage of the outstanding
     Common Stock held by such Stockholder before such proposed issuance;
     PROVIDED, HOWEVER, that if the use of proceeds of such transaction shall
     include the repurchase of Common Stock, then such percentage shall be
     calculated assuming the consummation of such repurchase) of the Common
     Stock or Rights to be sold.  If any Wavetek Stockholder fails to accept
     such offer, by written notice within 25 

                                      -7-


     days after its receipt of the Company's notice (a "DECLINING WAVETEK 
     STOCKHOLDER"), the Company shall offer to sell to each other Wavetek 
     Stockholder that has accepted such offer (an "ACCEPTING WAVETEK 
     STOCKHOLDER") such Accepting Wavetek Stockholders' pro rata portion (which 
     shall be a percentage  equal to the number of shares of outstanding Common 
     Stock held by such Accepting Wavetek Stockholder divided by the number of 
     shares of outstanding Common Stock held by all Accepting Wavetek 
     Stockholders desiring to acquire a portion of the Common Stock offered to 
     the Declining Wavetek Stockholder; such proration shall be made so that 
     Accepting Wavetek Stockholders shall have the right to acquire up to 100% 
     of the shares allocated to the Declining Wavetek Stockholder) of the 
     Common Stock offered to the Declining Wavetek Stock- holder.  If any 
     WG Stockholder fails to accept such offer by written notice within 25 days 
     after its receipt of the Company's notice (a "DECLINING WG STOCKHOLDER"), 
     the Company shall offer to sell to each other WG Stockholder that has 
     accepted such offer (an "ACCEPTING WG STOCKHOLDER") such Accepting 
     WG Stockholders' pro rata portion (which shall be a percentage equal to 
     the number of shares of outstanding Common Stock held by such Accepting 
     WG Stockholder divided by the number of shares of outstanding Common Stock 
     held by all Accepting WG Stockholders desiring to acquire a portion of the 
     Common Stock offered to the Declining WG Stockholder; such proration shall 
     be made so that Accepting WG Stockholders shall have the right to acquire 
     up to 100% of the shares allocated to the Declining WG Stockholder) of 
     the Common Stock offered to the Declining WG Stockholder.  If any 
     Stockholder fails to accept such offer by written notice within 25 days 
     after its receipt of the Company's notice, or any Accepting Wavetek 
     Stockholder or Accepting WG Stockholder fails to accept such offer of 
     Common Stock offered to a Declining Wavetek Stockholder or a Declining 
     WG Stockholder, respectively, by written notice within 2 business days 
     after its receipt of the Company's notice with respect thereto, the
     Company may proceed with such proposed issuance, free of any right on the
     part of such Stockholder or any Declining Wavetek Stockholder or Declining
     WG Stockholder under this Section 4.4 in respect thereof. This Section 4.4
     shall not apply to issuances of Common Stock or Rights (i) to employees
     pursuant to employee stock option plans, stock purchase plan or similar
     benefit program or agreement, where the primary purpose is not to raise
     additional equity capital for the Company or (ii) as consideration for the
     acquisition by the Company of another business or the merger of any
     business entity with and into the Company or any wholly owned subsidiary of
     the Company.

          4.5  LIQUIDITY.  In the event that an Initial Public Offering is not
     consummated by March 31, 1999, the Company agrees to use its reasonable
     best efforts to effectuate a transaction to provide liquidity for its
     stockholders.

                                      -8-


     23.  Section 5.1(a) of the Stockholders Agreement shall be renumbered as
Section 5.1(b) and shall be amended by inserting the following phrase at
beginning:  "Subsequent to an Initial Public Offering,"; Section 5.1(b) shall be
renumbered as Section 5.1(c); Section 5.1(c) shall be renumbered as Section
5.1(d); Section 5.1(d) shall be renumbered as Section 5.1(e); and the following
shall be inserted as Section 5.1(a):

               (a)  If an Initial Public Offering is not consummated within 
     24 months of the Effective Time, the Stockholders shall have a right 
     ("Pre-Offering Registration Right") to require the Company, as 
     expeditiously as possible, to use its best efforts to effect the 
     registration of the Shares that such Stockholders shall request, pursuant 
     to a Registration Statement, subject to the following limitations:

                    (i)    such Pre-Offering Registration Right shall be
          exercisable, on one occasion, by written notice given to the Company
          and to all other Stockholders by one or more Stockholders owning or
          holding of record greater than 15% of the issued and outstanding
          shares of Common Stock (the "Section 5.1(a) Notice");

                    (ii)   during the fifteen (15) day period following the
          giving of the Section 5.1(a) Notice, all Stockholders shall have the
          right to elect to participate in the Pre-Offering Registration Right
          by giving notice to the Company of their respective election;

                    (iii)  the shares to be registered by all Stockholders
          electing to register Shares pursuant to this Section 5.1(a) shall have
          an aggregate offering price of at least $10 million; and

                    (iv)   such Pre-Offering Registration Right shall terminate
          upon the consummation of an Initial Public Offering consummated after
          such 24 month period.

     24.  Section 5.1(e) of the Stockholders Agreement shall be renumbered as
Section 5.1(f) and shall be amended to read in its entirety as follows:

               (f)  PRIORITY IN REGISTRATIONS ON REQUEST.  If a registration
     pursuant to this Section 5.1 involves an underwritten offering and the
     managing underwriter with respect to such offering advises the Stockholders
     participating in such registration in writing that, in its opinion, the
     number of Shares which the Stockholders and any other persons intended to
     be included in such registration exceeds the largest number of Shares which
     can be sold in such offering without having an adverse effect on the
     offering of Shares as contemplated by such Stockholders, then the Company
     will include in such registration (i) first, in the 

                                      -9-


     case of the Initial Public Offering only, such Shares requested by HF, if 
     any, to enable it to reduce its ownership of shares in the Company 
     immediately following consummation of the Initial Public Offering to not 
     less than 10% of the outstanding shares (provided that any shares thereby 
     allocated to HF will reduce the shares available to other WG Stockholders 
     pursuant to clause (iv)), (ii) second, in the case of any registration 
     following the Initial Public Offering in which HF shall be entitled to 
     register Shares pursuant to Section 5.1 or 5.2 hereof, such shares 
     requested by HF, if any, (iii) third, all the shares the Company proposes 
     to sell for its own account and (iv) fourth, the Shares which the 
     Stockholders (excluding HF in the event clause (i) or (ii) shall be 
     applicable with respect to such registration) have requested to be included
     in such registration pursuant to Section 5.1 and which, in the opinion of 
     such managing underwriter, can be sold without having the adverse effect 
     referred to above, such reduced number of Shares shall be allocated 
     pro rata among all requesting Stockholders on the basis of the relative 
     number of Shares then owned or held of record by each such Stockholder  
     (provided that (A) any shares thereby allocated to any Wavetek Stockholder 
     that exceed such Wavetek Stockholder's request will be first reallocated 
     among the remaining requesting Wavetek Stockholders in like manner and 
     (B) any shares thereby allocated to any WG Stockholder that exceed such 
     WG Stockholders' request will first be reallocated among the remaining 
     requesting WG Stockholders in like manner). 

     25.  Section 6.4(a) of the Stockholders Agreement shall be amended by
inserting the following text at the end:

     At the time of the Initial Public Offering, this Agreement shall be amended
     (i) to eliminate provisions that are expressly operative only prior to the
     Initial Public Offering and (ii) as is otherwise then deemed appropriate by
     the Stockholders.  

     26.  The WG Stockholders represent that, except to the extent contained in
the Exchange Agreement or the Stockholders Agreement or contracts, arrangements
or understandings among the Wandel Stockholders or among the Goltermann
Stockholders, there is no contract, arrangement or understanding with any of the
WG Stockholders whereby they have agreed to act as a partnership, limited
partnership, syndicate or group for the purpose of acquiring, holding or
disposing of the shares of Wavetek Common Stock to be acquired pursuant to the
Exchange Agreement.
     
     27.  Each person executing this First Amendment who was not originally a
party to the Exchange Agreement or Stockholders Agreement agrees, effective upon
transfer of WG Interests to such person in accordance with the terms of the
Exchange Agreement, to be bound by the terms of the Exchange Agreement and
Stockholders Agreement, each as amended hereby, as if such person was a party to
such agreements.

                                      -10-


     28.  Except as expressly amended and modified hereby, the Exchange
Agreement and the Stockholders Agreement are reaffirmed and remain in full force
and effect.  This First Amendment may be executed in several counterparts, each
of which shall be deemed an original and all of which together shall constitute
one and the same instrument.

                                      -11-


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


                             WAVETEK CORPORATION


                             By:  /s/ Terence J. Gooding
                                  -----------------------------------------
                                  Name: Terence J. Gooding
                                  Title: Chairman and CEO


                             DLJ MERCHANT BANKING PARTNERS II, L.P.

                             By:  DLJ Merchant Banking II, Inc.
                                       Managing General Partner


                             By:  /s/ Ivy Dodes                            
                                  -----------------------------------------
                                  Name: Ivy Dodes
                                  Title: Vice President


                             DLJ MERCHANT BANKING PARTNERS II-A, L.P.

                             By:  DLJ Merchant Banking II, Inc.
                                       Managing General Partner


                             By:  /s/ Ivy Dodes    
                                  -----------------------------------------
                                  Name: Ivy Dodes
                                  Title: Vice President

                             DLJ DIVERSIFIED PARTNERS, L.P.

                             By:  DLJ Diversified Partners, Inc.
                                       Managing General Partner


                             By:  /s/ Ivy Dodes    
                                  -----------------------------------------
                                  Name: Ivy Dodes
                                  Title: Vice President

                                    -11-A-


                             DLJ DIVERSIFIED PARTNERS-A, L.P.

                             By:  DLJ Diversified Partners, Inc.
                                       Managing General Partner


                             By:  /s/ Ivy Dodes
                                  -----------------------------------------
                                  Name: Ivy Dodes
                                  Title: Vice President


                             DLJMB FUNDING II, INC.


                             By:  /s/ Ivy Dodes
                                  -----------------------------------------
                                  Name: Ivy Dodes
                                  Title: Vice President


                             DLJ FIRST ESC L.P.


                             By:  DLJ LBO Plans Management Corporation
                                       General Partner


                             By:  /s/ Ivy Dodes
                                  -----------------------------------------
                                  Name: Ivy Dodes
                                  Title: Vice President


                             DLJ EAB PARTNERS, L.P.

                             By:  DLJ LBO Plans Management Corporation
                                       General Partner


                             By:  /s/ Ivy Dodes
                                  -----------------------------------------
                                  Name: Ivy Dodes
                                  Title: Vice President

                                     -11-B-


                             DLJ MILLENNIUM PARTNERS, L.P.

                             By:  DLJ Merchant Banking II, Inc.
                                       Managing General Partner


                             By:  /s/ Ivy Dodes
                                  -----------------------------------------
                                  Name: Ivy Dodes
                                  Title: Vice President


                             DLJ MILLENNIUM PARTNERS-A, L.P.

                             By:  DLJ Merchant Banking II, Inc.
                                       Managing General Partner


                             By:  /s/ Ivy Dodes
                                  -----------------------------------------
                                  Name: Ivy Dodes
                                  Title: Vice President


                             DLJ OFFSHORE PARTNERS II, C.V.

                             By: DLJ Merchant Banking II, L.P.
                                   Managing General Partner


                             By:  /s/ Ivy Dodes 
                                  -----------------------------------------
                                  Name: Ivy Dodes
                                  Title: Vice President

                             UK INVESTMENT PLAN 1997 PARTNERS

                             By:  UK Investment Plan 1997 Partners, Inc.
                                       General Partner


                             By   /s/ Ivy Dodes
                                  -----------------------------------------
                                  Name: Ivy Dodes
                                  Title: Vice President

                                     -11-C-


                             GREEN EQUITY INVESTORS II, L.P.

                             By:  Grand Avenue Capital Partners, L.P.
                                       Grand Avenue Capital Corporation,
                                        its general partner


                             By:  /s/ Peter Nolan                           
                                  -----------------------------------------
                                  Name: Peter Nolan
                                  Title: Partner


                             SCHRODER UK VENTURE FUND III
                        
                             By:  Schroder Venture Managers Inc.,
                                       as General Partner of 
                                       Schroder UK Venture Fund III LP1


                             By:  /s/ Peter L. Everson          
                                  -----------------------------------------
                                  Peter L. Everson, Director & VP


                             And: /s/ Nicola Lawson       
                                  -----------------------------------------
                                  Nicola Lawson, Director & VP


                             SCHRODER UK VENTURE FUND III

                             By:  Schroder Venture Managers Inc.,
                                       as General Partner of 
                                       Schroder UK Venture Fund III LP2


                             By:  /s/ Peter L. Everson  
                                  -----------------------------------------
                                  Peter L. Everson, Director & VP


                             And: /s/ Nicola Lawson                 
                                  -----------------------------------------
                                  Nicola Lawson, Director & VP
                        
                                     -12-


                             SCHRODER UK VENTURE FUND III
                        
                             By:  Schroder International Trust Company Limited, 
                                  as Trustee of  Schroder UK Venture Fund III 
                                  Trust
                        
                        
                             By:  /s/ Peter L. Everson       
                                  -----------------------------------------
                                  Peter L. Everson, Director & VP
                        
                        
                             And: /s/ Nicola Lawson    
                                  -----------------------------------------
                                  Nicola Lawson, Secretary
                        

                             YOKOGAWA ELECTRIC CORPORATION
                        
                        
                             By:  /s/ Joichi Ueba   
                                  -----------------------------------------
                                  Name:  Joichi Ueba
                                  Title:  Senior Vice President
                        
                        
                             DR. TERENCE J. GOODING
                        
                        
                             /s/ Terence J. Gooding
                             ----------------------------------------------
                                                                    
                             Dr. Terence J. Gooding
                        
                             BARBARA A. GOODING
                             TERENCE J. GOODING GRAT 1
                             TERENCE J. GOODING GRAT 2
                             BARBARA A. GOODING GRAT
                        
                             
                             By:  /s/ Terence J. Gooding         
                                  -----------------------------------------
                                  Terence J. Gooding, as
                                  Attorney-in-Fact
                        
                                     -13-


Wavetek Management Stockholders:
- --------------------------------
                             
                             SNOW HILL TRUSTEES
                             RICHARD J. BERRY
                             PAUL STEVENSON
                        
                        
                             By:  /s/ Terence J. Gooding            
                                  -----------------------------------------
                                  Terence J. Gooding, as
                                  Attorney-in-Fact
                        
                        
                             DEREK T. MORIKAWA
                        
                        
                             /s/ Derek T. Morikawa                       
                             -----------------------------------------
                             Derek T. Morikawa
                        
                        
                             MORIKAWA TRUST F/B/O MEGAN K. MORIKAWA
                        
                        
                             By:  /s/ Criss Y. Morikawa     
                                  -----------------------------------------
                                  Criss Y. Morikawa, as Trustee
                        
                        
                             MORIKAWA TRUST F/B/O EVAN T. MORIKAWA
                        
                        
                             By:  /s/ Criss Y. Morikawa     
                                  -----------------------------------------
                                  Criss Y. Morikawa, as Trustee

                                      -14-


                             BEN J. CONSTANTINI
                        
                        
                        
                             /s/ Ben J. Constantini                      
                             ----------------------------------------------
                             Ben J. Constantini
                        
                        
                        
WG Stockholders:
- ----------------

                             WANDEL & GOLTERMANN MANAGEMENT
                             HOLDING GmbH
                        
                        
                        
                             By: /s/ Karl-Heinz Eisemann                  
                                  -----------------------------------------
                                  Name: Karl-Heinz Eisemann
                                  Title: Vice President, Controlling and 
                                         Logistics
                        
                        
                        
                             And: /s/ Rolf Schmid
                                  -----------------------------------------
                                   Name:/s/ Rolf Schmid
                                   Title: Chief Financial Officer
                             
                        
                        
                        
                             ALBRECHT WANDEL
                        
                        
                        
                             /s/ Albrecht Wandel  
                             ----------------------------------------------
                             Albrecht Wandel
                        
                        
                        
                             RENATE WANDEL
                        
                        
                        
                             /s/ Renate Wandel         
                             ----------------------------------------------
                             Renate Wandel

                                      -15-


                             FRANK GOLTERMANN
                        
                        
                             /s/ Frank Goltermann    
                             ----------------------------------------------
                             Frank Goltermann
                        
                        
                        
                             ULRIKE GOLTERMANN
                        
                        
                             By:  /s/ Frank Goltermann         
                                  -----------------------------------------
                                   Frank Goltermann, as Attorney-in-Fact
                        
                        
                        
                             BURKHARD GOLTERMANN
                        
                        
                        
                             /s/ Burkhard Goltermann    
                             -----------------------------------------
                             Burkhard Goltermann
                        
                        
                        
                             HANNOVER FINANZ W&G 
                             BETEILIGUNGSGESELLSCHAFT mbH
                        
                        
                        
                             By:  /s/ Joachim Simmross 
                                  -----------------------------------------
                                  Name: Joachim Simmross
                                  Title: Managing Director
                        
                        
                        
                        
                             And:  /s/ Claus von Loeper        
                                   ----------------------------------------
                                   Name: Claus von Loeper
                                   Title: Managing Director

                                     -16-


New WG Stockholders:
- --------------------
                        
                             
                             PETER WAGNER
                        
                        
                        
                             /s/ Peter Wagner                             
                             ----------------------------------------------
                             Peter Wagner
                        
                        
                        
                             ROBERTA AGOSTO GOLTERMANN
                        
                        
                        
                             By: /s/ Frank Goltermann
                                 ------------------------------------------
                                 Frank Goltermann, as Attorney-in-Fact
                        
                                                              

                                     -17-