1
                                                                    EXHIBIT 99.1

                              LETTER OF TRANSMITTAL
                                       FOR
                          10 3/4% SENIOR NOTES DUE 2005
                                       OF
                               PHASE METRICS, INC.
                  PURSUANT TO THE EXCHANGE OFFER IN RESPECT OF
              ALL OF ITS OUTSTANDING 10 3/4% SENIOR NOTES DUE 2005
                                       FOR
                          10 3/4% SENIOR NOTES DUE 2005

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

                PURSUANT TO THE PROSPECTUS DATED _________, 1998



THE EXCHANGE OFFER WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY TIME, ON ______
__, 1998 UNLESS THE EXCHANGE OFFER IS EXTENDED (THE "EXPIRATION DATE"). TENDERS
OF NOTES MAY BE WITHDRAWN AT ANY TIME PRIOR TO 12:00 MIDNIGHT ON THE EXPIRATION
DATE.

       TO: STATE STREET BANK AND TRUST OF CALIFORNIA, N.A., EXCHANGE AGENT





                                                       
         By Mail, Hand or Overnight Carrier:                              The Exchange Agent
State Street Bank and Trust Company of California, N.A    State Street Bank and Trust Company of California, N.A.
           633 West 5th Street, 12th Floor                                   By Facsimile:
           Los Angeles, California  90071                          (For Eligible Institutions Only)
                  Attn: Jeanie Mar                                          (213) 362-7357
                                                                        Confirm by Telephone:
                                                                            (213) 362-7338



        DELIVERY OF THIS LETTER OF TRANSMITTAL TO AN ADDRESS, OR TRANSMISSION
VIA FACSIMILE, OTHER THAN AS SET FORTH ABOVE WILL NOT CONSTITUTE A VALID
DELIVERY. THE INSTRUCTIONS CONTAINED HEREIN SHOULD BE READ CAREFULLY BEFORE THIS
LETTER TRANSMITTAL IS COMPLETED.

        HOLDERS WHO WISH TO BE ELIGIBLE TO RECEIVE NEW NOTES FOR THEIR NOTES
PURSUANT TO THE EXCHANGE OFFER MUST VALIDLY TENDER (AND NOT WITHDRAW) THEIR
NOTES TO THE EXCHANGE AGENT PRIOR TO THE EXPIRATION DATE.

        By execution hereof, the undersigned acknowledges receipt of the
Prospectus dated _______ ___, 1998 (the "Prospectus") of Phase Metrics, Inc., a
Delaware corporation (the "Company"), which, together with this Letter of
Transmittal and the instructions hereto (the "Letter of Transmittal"),
constitutes the Company's offer (the "Exchange Offer") to exchange $1,000
principal amount of its new 10 3/4% Senior Notes Due 2005 (the "New Notes"),
which have been registered under the Securities Act of 1933, as amended (the
"Securities Act"), pursuant to a Registration Statement of which the Prospectus
constitutes a part, for each $1,000 principal amount of its outstanding 10 3/4%
Senior Notes Due 2005 (the "Notes"), upon the terms and subject to the
conditions set forth in the Prospectus.


   2

                      DESCRIPTION OF NOTES TENDERED HEREBY



- -----------------------------------------------------------------------------------------------------------------------
                                                                             Aggregate
                                                                             Principal
      Name(s) and Address(es) of                  Certificate                  Amount                   Principal
         Registered Owner(s)                    or Registration             Represented                   Amount
           (Please Fill In)                         Numbers*                  by Notes                  Tendered**
- -----------------------------------------------------------------------------------------------------------------------
                                                                                              


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


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


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


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


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


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

                                                      Total
- -----------------------------------------------------------------------------------------------------------------------


*       Need not be completed by Book-entry Holders.

**      Unless otherwise indicated, the Holder will be deemed to have tendered
        the full aggregate principal amount represented by such Notes. All
        tenders must be in integral multiples of $1,000.

        This Letter of Transmittal is to be used (i) if certificates of Notes
are to be forwarded herewith, (ii) if delivery of Notes is to be made by
book-entry transfer to an account maintained by the Exchange Agent at The
Depository Trust Company (the "Depository") pursuant to the procedures set forth
in "The Exchange Offer -- Procedures for Tendering" in the Prospectus or
(iii) tender of the Notes is to be made according to the guaranteed delivery
procedures described in the Prospectus under the caption "The Exchange Offer --
Guaranteed Delivery Procedures." See Instruction 2. Delivery of documents to a
book-entry transfer facility does not constitute delivery to the Exchange Agent.

        The term "Holder" with respect to the Exchange Offer means any person in
whose name Notes are registered on the books of the Company or Trustee, or any
other person who has obtained a properly completed bond power from the
registered holder. The undersigned has completed, executed and delivered this
Letter of Transmittal to indicate the action the undersigned desires to take
with respect to the Exchange Offer. Holders who wish to tender their Notes must
complete this letter in its entirety.



[ ]     CHECK HERE IF TENDERED NOTES ARE BEING DELIVERED BY BOOK-ENTRY
        TRANSFER MADE TO THE ACCOUNT MAINTAINED BY THE EXCHANGE AGENT WITH THE
        BOOK-ENTRY TRANSFER FACILITY AND COMPLETE THE FOLLOWING:

        Name of Tendering Institution
                                     -------------------------------------------
        Account Number
                      ----------------------------------------------------------
        Transaction Code Number
                               -------------------------------------------------

        Holders whose Notes are not immediately available or who cannot deliver
their Notes and all other documents required hereby to the Exchange Agent on or
prior to the Expiration Date must tender their Notes according to the guaranteed
delivery procedure set forth in the Prospectus under the caption "The Exchange
Offer -- Guaranteed Delivery Procedures." See Instruction 2.


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[ ]     CHECK HERE IF NOTES ARE BEING DELIVERED PURSUANT TO A NOTICE OF
        GUARANTEED DELIVERY PREVIOUSLY SENT TO THE EXCHANGE AGENT AND COMPLETE
        THE FOLLOWING:

        Name of Registered Holder(s)
                                    --------------------------------------------
        Window Ticket (if any)
                              --------------------------------------------------
        Date of Execution of Notice of Guaranteed Delivery
                                                          ----------------------
        Name of Institution which guaranteed delivery
                                                     ---------------------------

        IF DELIVERED BY BOOK-ENTRY TRANSFER, COMPLETE THE FOLLOWING:

        Account Number
                      ----------------------------------------------------------
        Transaction Code Number
                               -------------------------------------------------


[ ]     CHECK HERE IF YOU ARE A BROKER-DEALER AND WISH TO RECEIVE 10 ADDITIONAL
        COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY AMENDMENTS OR SUPPLEMENTS
        THERETO.

        Name:
             -------------------------------------------------------------------
        Address:
                ----------------------------------------------------------------
        Telephone Number:
                         -------------------------------------------------------



   4

               PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY

Ladies and Gentlemen:

        Upon the terms and subject to the conditions of the Exchange Offer, the
undersigned hereby tenders to the Company the principal amount of the Notes
indicated above. Subject to, and effective upon, the acceptance for exchange of
such Notes tendered hereby, the undersigned hereby exchanges, assigns and
transfers to, or upon the order of, the Company all right, title in and interest
in and to such Notes as are being tendered hereby, including all rights to
accrued and unpaid interest thereon as of the Expiration Date. The undersigned
hereby irrevocably constitutes and appoints the Exchange Agent the true and
lawful agent and attorney-in-fact of the undersigned (with full knowledge that
said Exchange Agent acts as the agent of the Company in connection with the
Exchange Offer) to cause the Notes to be assigned, transferred and exchanged.
The undersigned represents and warrants that it has full power and authority to
tender, exchange, assign and transfer the Notes and to acquire New Notes
issuable upon the exchange of such tendered Notes, and that when the same are
accepted for exchange, the Company will acquire good and unencumbered title to
the tendered Notes, free and clear of all liens, restrictions, charges and
encumbrances and not subject to any adverse claim.

        The undersigned represents to the Company that (i) the New Notes
acquired pursuant to the Exchange Offer are being obtained in the ordinary
course of business of the person receiving such New Notes, whether or not such
person is the undersigned, and (ii) neither the undersigned nor any such other
person has an arrangement or understanding with any person to participate in a
distribution of such New Notes. If the undersigned or the person receiving the
New Notes covered hereby is a broker-dealer that is receiving the New Notes for
its own account in exchange for Notes that were acquired as a result of
market-making activities or other trading activities, the undersigned
acknowledges that it or such other person will deliver a prospectus in
connection with any resale of such New Notes; however, by so acknowledging and
by delivering a prospectus, the undersigned will not be deemed to admit that it
is an "underwriter" within the meaning of the Securities Act. The undersigned
and any such other person acknowledge that, if they are participating in the
Exchange Offer for the purpose of distributing the New Notes, (i) they cannot
rely on the position of the staff of the Securities and Exchange Commission
enunciated in Exxon Capital Holdings Corporation (available April 13, 1989),
Morgan Stanley & Co., Inc. (available June 5, 1991) Sherman & Sterling
(available July 2, 1993) or similar no-action letters and, in the absence of an
exemption therefrom, must comply with the registration and prospectus delivery
requirements of the Securities Act in connection with any resale transaction and
(ii) failure to comply with such requirements in such instance could result in
the undersigned or any such other person incurring liability under the
Securities Act for which such persons are not indemnified by the Company. If the
undersigned or the person receiving the New Notes covered by this letter is an
"affiliate" (as defined under Rule 405 of the Securities Act) of the Company,
the undersigned represents to the Company that the undersigned understands and
acknowledges that such New Notes may not be offered for resale, resold or
otherwise transferred by the undersigned or such other person without
registration under the Securities Act or an exemption therefrom.

        The undersigned also warrants that it will, upon request, execute and
deliver any additional documents deemed by the Exchange Agent or the Company to
be necessary or desirable to complete the exchange, assignment and transfer of
tendered Notes or transfer ownership of such Notes on the account books
maintained by a book-entry transfer facility. The undersigned further agrees
that acceptance of any tendered Notes by the Company and the issuance of New
Notes in exchange therefor shall constitute performance in full by the Company
of its obligations under the Registration Rights Agreement and that the Company
shall have no further obligations or liabilities thereunder for the registration
of the Notes or the New Notes.

        The Exchange Offer is subject to certain conditions set forth in the
Prospectus under the caption "The Exchange Offer -- Conditions." The undersigned
recognizes that as a result of these conditions (which may be waived, in whole
or in part, by the Company), as more particularly set forth in the Prospectus,
the Company may not be required to exchange any of the Notes tendered hereby
and, in such event, the Notes not exchanged will be returned to the undersigned
at the address shown below the signature of the undersigned.

        All authority herein conferred or agreed to be conferred shall survive
the death or incapacity of the undersigned and every obligation of the
undersigned hereunder shall be binding upon the heirs, personal representatives,
successors and assigns of the undersigned. Tendered Notes may be withdrawn at
any time prior to the Expiration Date as described in the Prospectus.

        Unless otherwise indicated in the box entitled "Special Issuance
Instructions" or the box entitled "Special Delivery Instruction" in this Letter
of Transmittal, certificates for all New Notes delivered in exchange for
tendered Notes, and any


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Notes delivered herewith but not exchanged, will be registered in the name of
the undersigned and shall be delivered to the undersigned at the address shown
below the signature of the undersigned. If a New Note is to be issued to a
person other than the person(s) signing this Letter of Transmittal, or if the
New Note is to be mailed to someone other than the person(s) signing this Letter
of Transmittal or to the person(s) signing this Letter of Transmittal at an
address different than the address shown on this Letter of Transmittal, the
appropriate boxes of this Letter of Transmittal should be completed. If Notes
are surrendered by Holder(s) that have completed either the box entitled
"Special Issuance Instructions" or the box entitled "Special Delivery
Instructions" in this Letter of Transmittal, signature(s) on this Letter of
Transmittal must be guaranteed by an Eligible Institution (defined in
Instruction 4).

        THE UNDERSIGNED, BY COMPLETING THE BOX ENTITLED "DESCRIPTION OF NOTES
TENDERED HEREBY" ABOVE AND SIGNING THIS LETTER, WILL BE DEEMED TO HAVE TENDERED
THE NOTES AS SET FORTH IN SUCH BOX ABOVE.


                          SPECIAL ISSUANCE INSTRUCTIONS
                           (SEE INSTRUCTIONS 4 AND 5)


     To be completed ONLY if Notes for Notes not exchanged and/or New Notes are
to be issued in the name of and sent to someone other than the person(s) whose
signature(s) appear(s) on this Letter above, or if Notes delivered by book-entry
transfer which are not accepted for exchange are to be returned by credit to an
account maintained at the Book-Entry Transfer Facility other than the account
indicated above.

Issue New Notes and/or Notes to:

Name(s):
        ------------------------------------------------------------------------
                             (PLEASE TYPE OR PRINT)

- --------------------------------------------------------------------------------
                             (PLEASE TYPE OR PRINT)


Address:

- --------------------------------------------------------------------------------
                              (INCLUDING ZIP CODE)

   (Complete accompanying Substitute Form W-9) Credit unexchanged Notes
delivered by book-entry transfer to the Book-Entry Transfer Facility account set
forth below.

- --------------------------------------------------------------------------------
                          (BOOK-ENTRY TRANSFER FACILITY
                         ACCOUNT NUMBER, IF APPLICABLE)


                         SPECIAL DELIVERY INSTRUCTIONS
                           (SEE INSTRUCTIONS 4 AND 5)

     To be completed ONLY if Notes for Notes not exchanged and/or New Notes are
to be sent to someone other than the person(s) whose signature(s) appear(s) on
this Letter above or to such person(s) at an address other than shown in the box
entitled "Description of Notes Tendered Hereby" on this Letter above.

Mail New Notes and/or Notes to:


Name(s):
        ------------------------------------------------------------------------
                             (PLEASE TYPE OR PRINT)

- --------------------------------------------------------------------------------
                             (PLEASE TYPE OR PRINT)


Address:

- --------------------------------------------------------------------------------
                              (INCLUDING ZIP CODE)


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                     REGISTERED HOLDER(S) OF NOTES SIGN HERE
                (IN ADDITION, COMPLETE SUBSTITUTE FORM W-9 BELOW)



X
- --------------------------------------------------------------------------------

X
- --------------------------------------------------------------------------------


SIGNATURE(S) OF REGISTERED HOLDER(S):

        Must be signed by registered holder(s) exactly as name(s) appear(s) on
the Notes or on a security position listing as the owner of the Notes or by
person(s) authorized to become registered holder(s) by properly completed bond
powers transmitted herewith. If signature is by attorney-in-fact, trustee,
executor, administrator, guardian, officer of a corporation or other person
acting in a fiduciary capacity, please provide the following information.

(PLEASE PRINT OR TYPE).

Name(s):
        ------------------------------------------------------------------------

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

Capacity (full title):
                      ----------------------------------------------------------

Address (including zip code):
                             ---------------------------------------------------

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

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


Area Code and Telephone Number:
                               -----------------------

Taxpayer Identification or Social Security No.:
                                               ---------------------------------

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


                               SIGNATURE GUARANTEE
                        (IF REQUIRED - SEE INSTRUCTION 4)

Authorized Signature:
                     -----------------------------------------------------------
                      (Signature of Representative of Signature Guarantor)

Name and Title:
               -----------------------------------------------------------------

Name of Plan:
             -------------------------------------------------------------------

Area Code and Telephone Number:
                               -----------------------------

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


IMPORTANT:     THIS LETTER OR A FACSIMILE HEREOF (TOGETHER WITH THE NOTES OR A
               BOOK-ENTRY CONFIRMATION AND ALL OTHER REQUIRED DOCUMENTS OR THE 
               NOTICE OF GUARANTEED DELIVERY) MUST BE RECEIVED BY THE EXCHANGE
               AGENT PRIOR TO 12:00 MIDNIGHT, NEW YORK TIME, ON THE EXPIRATION
               DATE.

                     PLEASE READ THIS LETTER OF TRANSMITTAL
                    CAREFULLY BEFORE COMPLETING ANY BOX ABOVE


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                        PAYOR'S NAME: PHASE METRICS, INC.

              THIS SUBSTITUTE FORM W-9 MUST BE COMPLETED AND SIGNED

        Please provide your social security number or other taxpayer
identification number on the following Substitute Form W-9 and certify therein
that you are subject to backup withholding.


- --------------------------------------------------------------------------------
Name


- --------------------------------------------------------------------------------
Business name, if different from above

Check appropriate box:   [ ] Individual/Sole proprietor [ ] Corporation   

[ ] Partnership   [ ] Other
                           -----------------------------------------------------


- --------------------------------------------------------------------------------
Address (number, street, and apt. or suite no.)


- --------------------------------------------------------------------------------
City, state, and ZIP code

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

                                                                      
SUBSTITUTE                        Part 1 -- PLEASE PROVIDE YOUR TIN IN      Social security number
FORM W-9                          THE BOX AT RIGHT AND CERTIFY BY           _____________________
                                  SIGNING AND DATING BELOW                  OR
                                                                            Employer identification
                                                                            number
                                                                            _____________________

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

                                  Part 2 -- Check the box if you are NOT subject to backup withholding under the
Department of the Treasury        provisions of Section 2306(a)(1)(C) of the Internal Revenue Code because (1)  
Internal Revenue Service          you are exempt from backup withholding, (2) you have not been notified that you
                                  are subject to backup withholding as a result of failure to report all interest or
                                  dividends or (3) the Internal Revenue Service has notified you that you are no
                                  longer subject to backup withholding. [ ]

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

PAYER'S REQUEST FOR               Part 3 -- CERTIFICATION -- UNDER THE PENALTIES OF PERJURY, I
TAXPAYER IDENTIFICATION           CERTIFY THAT THE INFORMATION PROVIDED ON THIS FORM IS
NUMBER (TIN)                      TRUE, CORRECT AND COMPLETE.

                                  Awaiting TIN [ ]

                                  SIGNATURE:                  DATE:
                                  ---------------------------      -------------

- --------------------------------------------------------------------------------
NOTE:   FAILURE TO COMPLETE AND RETURN THIS FORM MAY RESULT IN BACKUP
        WITHHOLDING OF 31% OF PAYMENTS MADE TO YOU.

      YOU MUST COMPLETE THE FOLLOWING CERTIFICATE IF YOU CHECKED THE BOX IN
                         PART 3 OF SUBSTITUTE FORM W-9.

                CERTIFICATE OF AWAITING TAX IDENTIFICATION NUMBER

I certify under penalties of perjury that a taxpayer identification number has
not been issued to me, and either (a) I have mailed or delivered an application
to receive a taxpayer identification number to the appropriate Internal Revenue
Service Center or Social Security Administration Office, or (b) I intend to mail
or deliver an application in the near future. I understand that if I do not
provide a taxpayer identification number within 60 days, 31% of all reportable
payments made to me thereafter will be withheld, until I provide a number.


- --------------------------------           -------------------------------------
         Signature                                        Date


   8

                                  INSTRUCTIONS
                          FORMING PART OF THE TERMS AND
                        CONDITIONS OF THE EXCHANGE OFFER

1.      DELIVERY OF THIS LETTER OF TRANSMITTAL AND CERTIFICATES.

        All physically delivered Notes or confirmation of any book-entry
transfer to the Exchange Agent's account at a book-entry transfer facility of
Notes tendered by book-entry transfer, as well as a properly completed and duly
executed copy of this Letter of Transmittal or facsimile thereof, and any other
documents required by this Letter of Transmittal, must be received by the
Exchange Agent at its address set forth herein on or prior to the Expiration
Date. The method of delivery of this Letter of Transmittal, the Notes and any
other required documents is at the election and risk of the Holder, and except
as otherwise provided below, the delivery will be deemed made only when actually
received by the Exchange Agent. If such delivery is by mail, it is suggested
that registered mail with return receipt requested, properly insured, be used.

        No alternative, conditional, irregular or contingent tenders will be
accepted. All tendering Holders, by execution of this Letter of Transmittal (or
facsimile thereof), shall waive any right to receive notice of the acceptance of
the Notes for exchange.

        Delivery to an address of the Trustee other than as set forth herein, or
instructions via a facsimile number other than the ones set forth herein, will
not constitute a valid delivery.

2.      GUARANTEED DELIVERY PROCEDURES.

        Holders who wish to tender their Notes, but whose Notes are not
immediately available and thus cannot deliver their Notes, the Letter of
Transmittal or any other required documents to the Exchange Agent (or comply
with the procedures for book-entry transfer) prior to the Expiration Date, may
effect a tender if:

               (a) the tender is made through a member firm of a registered
   national securities exchange or of the National Association of Securities
   Dealers, Inc., a commercial bank or trust company having an office or
   correspondent in the United States or an "eligible guarantor institution"
   within the meaning of Rule 17Ad-15 under the Exchange Act (an "Eligible
   Institution");

               (b) prior to the Expiration Date, the Exchange Agent receives
   from such Eligible Institution a properly completed and duly executed Notice
   of Guaranteed Delivery (by facsimile transmission, mail or hand delivery)
   setting forth the name and address of the Holder, the certificate number(s)
   of such Notes and the principal amount of Notes tendered, stating that the
   tender is being made thereby and guaranteeing that, within three New York
   Stock Exchange trading days after the Expiration Date, the Letter of
   Transmittal (or facsimile thereof), together with the Notes (or a
   confirmation of book-entry transfer of such Notes into the Exchange Agent's
   account at the Depository) and any other documents required by the Letter Of
   Transmittal, will be deposited by the Eligible Institution with the Exchange
   Agent; and

               (c) such properly completed and executed Letter of Transmittal
   (or facsimile thereof), as well as all tendered Notes in proper form for
   transfer (or a confirmation of book-entry transfer of such Notes into the
   Exchange Agent's account at the Depository) and all other documents required
   by the Letter of Transmittal, are received by the Exchange Agent within three
   New York Stock Exchange trading days after the Expiration Date.

        Upon request to the Exchange Agent, a Notice of Guaranteed Delivery form
will be sent to Holders who wish to tender their Notes according to the
guaranteed delivery procedures set forth above. Any Holder who wishes to tender
Notes pursuant to the guaranteed delivery procedures described above must ensure
that the Exchange Agent receives the Notice of Guaranteed Delivery relating to
such Notes prior to the Expiration Date. Failure to complete the guaranteed
delivery procedures outlined above will not, of itself, affect the validity or
effect a revocation of any Letter of Transmittal form properly completed and
executed by a Holder who attempted to use the guaranteed delivery procedures.


   9

3.      PARTIAL TENDERS; WITHDRAWALS.

        If less than the entire principal amount of Notes evidenced by a
submitted certificate is tendered, the tendering Holder should fill in the
principal amount tendered in the column entitled "Principal Amount Tendered" of
the box entitled "Description of Notes Tendered Hereby." A newly issued Note for
the principal amount of Notes submitted but not tendered will be sent to such
Holder as soon as practicable after the Expiration Date. All Notes delivered to
the Exchange Agent will be deemed to have been tendered in full unless otherwise
indicated.

        Notes tendered pursuant to the Exchange Offer may be withdrawn at any
time prior to the Expiration Date as described in the Prospectus, after which
tenders of Notes are irrevocable.

4.      SIGNATURE ON THIS LETTER OF TRANSMITTAL, WRITTEN INSTRUMENTS AND
        ENDORSEMENTS; GUARANTEE OF SIGNATURES.

        If this Letter of Transmittal is signed by the registered Holder(s) of
the Notes tendered hereby, the signature must correspond with the name(s) as
written on the face of the certificates without alternation or enlargement or
any change whatsoever. If this Letter of Transmittal is signed by a participant
in the Depository, the signature must correspond with the name as it appears on
the security position listing as the owner of the Notes.

        If any of the Notes tendered hereby are owned of record by two or more
joint owners, all such owners must sign this Letter of Transmittal.

        If a number of Notes registered in different names are tendered, it will
be necessary to complete, sign and submit as many separate copies of this Letter
of Transmittal as there are different registrations of Notes.

        Signatures on this Letter of Transmittal or a notice of withdrawal, as
the case may be, must be guaranteed by an Eligible Institution unless the Notes
tendered hereby are tendered (i) by a registered Holder who has not completed
the box entitled "Special Issuance Instructions" or "Special Delivery
Instructions" on the Letter of Transmittal or (ii) for the account of an
Eligible Institution.

        If this Letter of Transmittal is signed by the registered Holder or
Holders of Notes (which term, for the purposes described herein, shall include a
participant in the Depository whose name appears on a security listing as the
owner of the Notes) listed and tendered hereby, no endorsements of the tendered
Notes or separate written instruments of transfer or exchange are required. In
any other case, the registered Holder (or acting Holder) must either properly
endorse the Notes or transmit properly completed bond powers with this Letter of
Transmittal (in either case, executed exactly as the name(s) of the registered
Holder(s) appear(s) on the Notes, and, with respect to a participant in the
Depository whose name appears on a security position listing as the owner of
Notes, exactly as the name of the participant appears on such security position
listing), with the signature on the Notes or bond power guaranteed by an
Eligible Institution (except where the Notes are tendered for the account of an
Eligible Institution).

        If this Letter of Transmittal, any certificates or separate written
instruments of transfer or exchange are signed by trustees, executors,
administrators, guardians, attorneys-in-fact, officers of corporations or others
acting in a fiduciary or representative capacity, such persons should so
indicate when signing, and, unless waived by the Company, proper evidence
satisfactory to the Company of their authority so to act must be submitted.
Please contact the Company if there are any questions regarding what constitutes
proper evidence.

5.      SPECIAL ISSUANCE AND DELIVERY INSTRUCTIONS.

        Tendering Holders should indicate, in the applicable box, the name and
address (or account at the Depository) in which the New Notes or substitute
Notes for principal amounts not tendered or not accepted for exchange are to be
issued (or deposited), if different from the names and addresses or accounts of
the person signing this Letter of Transmittal. In the case of issuance in a
different name, the employer identification number or social security number of
the person named must also be indicated and the tendering Holder should complete
the applicable box.


   10

        If no instructions are given, the New Notes (and any Notes not tendered
or not accepted) will be issued in the name of and sent to the acting Holder of
the Notes or deposited at such Holder's account at the Depository.

6.      TRANSFER TAXES.

        The Company shall pay all transfer taxes, if any, applicable to the
transfer and exchange of Notes to it or its order pursuant to the Exchange
Offer. If a transfer tax is imposed for any other reason other than the transfer
and exchange of Notes to the Company or its order pursuant to the Exchange
Offer, the amount of any such transfer taxes (whether imposed on the registered
Holder or any other person) will be payable by the tendering Holder. If
satisfactory evidence of payment of such taxes or exception therefrom is not
submitted herewith, the amount of such transfer taxes will be collected from the
tendering Holder by the Exchange Agent.

        Except as provided in this Instruction 6, it will not be necessary for
transfer stamps to be affixed to the Notes listed in this Letter of Transmittal.

7.      WAIVER OF CONDITIONS.

        The Company reserves the right, in its reasonable judgment, to waive, in
whole or in part, any of the conditions to the Exchange Offer set forth in the
Prospectus.

8.      MUTILATED, LOST, STOLEN OR DESTROYED NOTES.

        Any Holder whose Notes have been mutilated, lost, stolen or destroyed
should contact the Exchange Agent at the address indicated above for further
instructions.

9.      REQUESTS FOR ASSISTANCE OR ADDITIONAL COPIES.

        Questions relating to the procedure for tendering as well as requests
for additional copies of the Prospectus and this Letter of Transmittal, may be
directed to the Exchange Agent at the address and telephone number(s) set forth
above. In addition, all questions relating to the Exchange Offer, as well as
requests for assistance or additional copies of the Prospectus and this Letter
of Transmittal, may be directed to Phase Metrics, Inc., 10260 Sorrento Valley
Road, San Diego, California, telephone (619) 646-4800.

10. VALIDITY AND FORM.

        All questions as to the validity, form, eligibility (including time of
receipt), acceptance of tendered Notes and withdrawal of tendered Notes will be
determined by the Company in its sole discretion, which determination will be
final and binding. The Company reserves the absolute right to reject any and all
Notes not properly tendered or any Notes the Company's acceptance of which
would, in the opinion of counsel for the Company, be unlawful. The Company also
reserves the right, in its reasonable judgment, to waive any defects,
irregularities or conditions of tender as to particular Notes. The Company's
interpretation of the terms and conditions of the Exchange Offer (including the
instructions in this Letter of Transmittal) will be final and binding on all
parties. Unless waived, any defects or irregularities in connection with tenders
of Notes must be cured within such time as the Company shall determine. Although
the Company intends to notify Holders of defects or irregularities with respect
to tenders of Notes, neither the Company, the Exchange Agent nor any other
person shall incur any liability for failure to give such notification. Tenders
of Notes will not be deemed to have been made until such defects or
irregularities have been cured or waived. Any Notes received by the Exchange
Agent that are not properly tendered and as to which the defects or
irregularities have not been cured or waived will be returned by the Exchange
Agent to the tendering Holder as soon as practicable following the Expiration
Date.


   11

                            IMPORTANT TAX INFORMATION

        Under federal income tax law, a Holder tendering Notes is required to
provide the Exchange Agent with such Holder's correct TIN on Substitute Form W-9
above. If such Holder is an individual, the TIN is the Holder's social security
number. The Certificate of Awaiting Taxpayer Identification Number should be
completed if the tendering Holder has not been issued a TIN and has applied for
a number or intends to apply for a number in the near future. If the Exchange
Agent is not provided with the correct TIN, the Holder may be subject to a 
penalty imposed by the Internal Revenue Service. In addition, payments that are
made to such Holder with respect to tendered Notes may be subject to backup
withholding.

        Certain Holders (including, among others, all domestic corporations and
certain foreign individuals and foreign entities) are not subject to these
backup withholding and reporting requirements. Such a Holder, who satisfies one
or more of the conditions set forth in Part 2 of the Substitute Form W-9 should
execute the certification following such Part 2. In order for a foreign Holder
to qualify as an exempt recipient, that Holder must submit to the Exchange Agent
a properly completed Internal Revenue Service Form W-8, signed under penalties
of perjury, attesting to that Holder's exempt status. Such forms can be obtained
from the Exchange Agent.

        If backup withholding applies, the Exchange Agent is required to
withhold 31% of any amounts otherwise payable to the Holder. Backup withholding
is not an additional tax. Rather, the tax liability of persons subject to backup
withholding will be reduced by the amount of tax withheld. If withholding
results in an overpayment of taxes, a refund may be obtained from the Internal
Revenue Service.

PURPOSE OF SUBSTITUTE FORM W-9

        To prevent backup withholding on payments that are made to a Holder with
respect to Notes tendered for exchange, the Holder is required to notify the
Exchange Agent of his or her correct TIN by completing the form herein
certifying that the TIN provided on Substitute Form W-9 is correct (or that such
Holder is awaiting a TIN) and that (i) each Holder is exempt, (ii) such Holder
has not been notified by the Internal Revenue Service that he or she is subject
to backup withholding as a result of failure to report all interest or dividends
or (iii) the Internal Revenue Service has notified such Holder that he or she is
no longer subject to backup withholding.

WHAT NUMBER TO GIVE THE EXCHANGE AGENT

        Each Holder is required to give the Exchange Agent the social security
number or employer identification number of the record Holder(s) of the Notes.
If Notes are in more than one name or are not in the name of the actual Holder,
consult the instructions on Internal Revenue Service Form W-9, which may be
obtained from the Exchange Agent, for additional guidance on which number to
report.

CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER

        If the tendering Holder has not been issued a TIN and has applied for a
number or intends to apply for a number in the near future, write "Applied For"
in the space for the TIN on Substitute Form W-9, sign and date the form and the
Certificate of Awaiting Taxpayer Identification Number and return them to the
Exchange Agent. If such certificate is completed and the Exchange Agent is not
provided with the TIN within 60 days, the Exchange Agent will withhold 31% of
all payments made thereafter until a TIN is provided to the Exchange Agent.

        IMPORTANT: THIS LETTER OF TRANSMITTAL OR A FACSIMILE THEREOF (TOGETHER
WITH NOTES OR CONFIRMATION OF BOOK-ENTRY TRANSFER AND ALL OTHER REQUIRED
DOCUMENTS) OR A NOTICE OF GUARANTEED DELIVERY MUST BE RECEIVED BY THE EXCHANGE
AGENT ON OR PRIOR TO THE EXPIRATION DATE.