SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

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

                                 SCHEDULE TO/A
                                 (RULE 14d-100)
                 Tender Offer Statement Under Section 14(d)(1)
           or Section 13(e)(1) of the Securities Exchange Act of 1934
                              (AMENDMENT NO. 5) *

                                  SCHEDULE 13D
                               (AMENDMENT NO. 1)


                               IFR SYSTEMS, INC.
                       (Name of Subject Company (issuer))

                            TESTCO ACQUISITION CORP.
                          a wholly owned subsidiary of

                             AEROFLEX INCORPORATED
                      (Names of Filing Persons (offerors))

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

                     Common Stock, Par Value $.01 Per Share
           (Including the Associated Rights to Purchase Common Stock)
                         (Title of Class of Securities)

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

                                   449507102
                     (CUSIP Number of Class of Securities)

                                 Michael Gorin
                                   President
                             Aeroflex Incorporated
                             35 South Service Road
                              Plainview, NY 11803
                           Telephone: (516) 694-6700
(Name, address and telephone number of person authorized to
         receive notices and communications on behalf of filing persons)

                                    Copy to:

Blaine V. Fogg, Esq.                     Nancy D. Lieberman, Esq.
Skadden, Arps, Slate, Meagher & Flom LLP Blau, Kramer, Wactlar & Lieberman, P.C.
Four Times Square                        100 Jericho Quadrangle
New York, NY 10036                       Jericho, NY 11753
Telephone: 212-735-3000                  Telephone: 516-822-4820


                           CALCULATION OF FILING FEE
- --------------------------------------------------------------------------------
                                        
Transaction Valuation**                    Amount Of Filing Fee***
     $12,485,984                                  $1,149


- --------------------------------------------------------------------------------
<FN>
**   Estimated for the purpose of calculating  the filing fee only in accordance
     with Rule 0-11(d)  under the  Securities  Exchange Act of 1934, as amended,
     based upon (a) $1.35  multiplied by (b) 9,248,877,  representing the number
     of shares of common  stock,  par value $.01 per share of IFR Systems,  Inc.
     (including the associated  rights to purchase  common stock,  the "Shares")
     outstanding as of April 19, 2002 plus the maximum number of Shares issuable
     pursuant to outstanding options. The amount of the filing fee calculated in
     accordance  with Section 13(e) of the  Securities  Exchange Act of 1934, as
     amended, equals the product of .000092 and the transaction value.

***  The filing fee was previously paid.
</FN>


[ ]  Check  the  box if any  part of the fee is  offset  as  provided  by Rule
     0-11(a)(2)  and  identify  the  filing  with which the  offsetting  fee was
     previously  paid.  Identify the previous filing by  registration  statement
     number or the Form or Schedule and the date of its filing.

     Amount Previously Paid: N/A             Form or Registration No.: N/A
     Filing party: N/A                       Date Filed: N/A

[ ]  Check the box if the filing relates solely to preliminary  communications
     made before the commencement of a tender offer.
- --------------------------------------------------------------------------------

Check the appropriate boxes below to designate any transactions to which the
statement relates:

        [X] third-party tender offer subject to Rule 14d-1.

        [ ] issuer tender offer subject to Rule 13e-4.

        [ ] going-private transaction subject to Rule 13e-3.

        [ ] amendment to Schedule 13D under Rule 13d-2.

Check the following box if the filing is a final amendment reporting the results
of the tender offer: [ ]
- --------------------------------------------------------------------------------

* This  Amendment No. 5 to Schedule TO also  constitutes  Amendment No. 1 to the
Schedule 13D of the Filing Persons with respect to the Securities of the Subject
Company  purchased  by the Filing  Persons in the Offer,  including  the initial
period of the Subsequent  Offering  Period thereof.  The  information  contained
herein  and in the  Tender  Offer  Statement  on  Schedule  TO, as  amended,  is
incorporated by reference for purposes of the Schedule 13D.

==============================================================================
                                  SCHEDULE 13D

CUSIP No. 449507102
- -----------------------------------------------------------------------

     1.   NAMES OF REPORTING PERSONS/
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only)
          Aeroflex Incorporated
          IRS Id. No: 11-1974412
         -------------------------------------------------------------------

     2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:
                                                           (a)  ( )
                                                           (b)  (X)
     -----------------------------------------------------------------------
     3.   SEC USE ONLY

     -----------------------------------------------------------------------
     4.   SOURCE OF FUNDS*
          WC
     -----------------------------------------------------------------------
     5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
          PURSUANT TO ITEM 2(d) or 2(e)                    (  )

     -----------------------------------------------------------------------
     6.   CITIZENSHIP OR PLACE OF ORGANIZATION
            Delaware
     -----------------------------------------------------------------------
                                      7.   SOLE VOTING POWER
           NUMBER OF                       0
            SHARES                 _________________________________________
         BENEFICIALLY                 8.   SHARED VOTING POWER
           OWNED BY                        7,273,333
             EACH                  _________________________________________
           REPORTING                  9.   SOLE DISPOSITIVE POWER
            PERSON                         0
             WITH                  _________________________________________
                                     10.   SHARED DISPOSITIVE POWER
                                           7,273,333
     -----------------------------------------------------------------------
     11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                                           7,273,333
     -----------------------------------------------------------------------
     12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 11 EXCLUDES CERTAIN
          SHARES                                        (  )
     -------------------------------------------------------------------
     13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11

                                   87.8%(1)
     -------------------------------------------------------------------
     14.  TYPE OF REPORTING PERSON
          CO

- ------------------------
(1)  Based on the 8,282,009 shares issued and outstanding as of the close of
     business on April 12, 2002.


SCHEDULE 13D

     CUSIP No.  449507102
     -----------------------------------------------------------------------
     1.   NAMES OF REPORTING PERSONS/
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only)
          Testco Acquisition Corp.
          IRS Id. No:  32-0010978
         -------------------------------------------------------------------
     2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:
                                                           (a)  ( )
                                                           (b)  (X)
     -------------------------------------------------------------------
     3.   SEC USE ONLY

     -------------------------------------------------------------------
     4.   SOURCE OF FUNDS*
          AF
     -------------------------------------------------------------------
     5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
          PURSUANT TO ITEM 2(d) or 2(e)                    (  )

     -------------------------------------------------------------------
     6.   CITIZENSHIP OR PLACE OF ORGANIZATION
            Delaware
     -------------------------------------------------------------------
                                      7.   SOLE VOTING POWER
           NUMBER OF                       0
            SHARES                 _____________________________________
         BENEFICIALLY                 8.   SHARED VOTING POWER
           OWNED BY                        7,273,333
             EACH                  _____________________________________
           REPORTING                  9.   SOLE DISPOSITIVE POWER
            PERSON                         0
             WITH                  _____________________________________
                                     10.   SHARED DISPOSITIVE POWER
                                           7,273,333
     -------------------------------------------------------------------
     11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                                           7,273,333
     -------------------------------------------------------------------
     12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 11 EXCLUDES CERTAIN
          SHARES                                        (  )
     -------------------------------------------------------------------
     13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11

                                   87.8%(1)
     -------------------------------------------------------------------
     14.  TYPE OF REPORTING PERSON
          CO

- ----------------
(1)  Based on the 8,282,009 shares issued and outstanding as of the close of
     business on April 12, 2002.


     This  Amendment  No. 5 to the Tender  Offer  Statement  on Schedule TO (the
"Schedule TO"),  filed initially with the Securities and Exchange  Commission on
April 19, 2002,  relates to the offer by Testco  Acquisition  Corp.,  a Delaware
corporation  (the  "Purchaser")  and  a  wholly  owned  subsidiary  of  Aeroflex
Incorporated,  a  Delaware  corporation  ("Aeroflex"),  to  purchase  all of the
outstanding  shares of common  stock,  par value $.01 per share  (including  the
associated rights to purchase common stock, the "Shares"), of IFR Systems, Inc.,
a Delaware  corporation (the  "Company"),  at a price of $1.35 per Share, net to
the  seller in cash (the  "Offer  Price"),  upon the  terms and  subject  to the
conditions set forth in the Purchaser's Offer to Purchase, dated April 19, 2002,
and  in the  related  Letter  of  Transmittal  (which  together  constitute  the
"Offer"),  previously  filed as exhibits  (a)(1) and (a)(2),  respectively,  the
Schedule TO.

Items 8 and 11.  Interest  in  Securities  of the  Subject  Company;  Additional
Information.

     Items 8 and 11 of the Schedule TO are hereby  amended and  supplemented  to
add the following:

     The initial period of the Subsequent  Offering  Period of the Offer expired
at 11:59 p.m.  New York City time on Monday,  June 3, 2002.  During this period,
the Purchaser  accepted for payment all Shares validly tendered  pursuant to the
Offer as such Shares were tendered. The Purchaser was informed by the Depositary
that  approximately  7,273,333 Shares were validly tendered as of the expiration
of the initial period of the Subsequent  Offering  Period  (including the Shares
previously  tendered  during the initial  period of the Offer and  accepted  for
purchase), including approximately 5,250 Shares tendered by notice of guaranteed
delivery.  This number of Shares represented  approximately  87.8% of the issued
and outstanding Shares of the Company.

     In  accordance  with  the  terms  of the  Merger  Agreement,  Aeroflex  has
determined  to extend the  Subsequent  Offering  Period  during which holders of
Shares may tender  their  Shares and receive  the Offer  Price.  The  Subsequent
Offering  Period has been  extended  and now will expire at 11:59 p.m.  New York
City  time on  Friday,  June 14,  2002.  As  previously  disclosed,  during  the
Subsequent  Offering  Period,  Shares will be accepted and promptly  paid for as
they are  tendered.  Shares that are  tendered  during the  Subsequent  Offering
Period may not be withdrawn. In accordance with applicable law, Aeroflex and the
Purchaser may not further extend the Subsequent Offering Period.

     On June 4, 2002,  Aeroflex issued a press release  announcing the extension
of the  Subsequent  Offering  Period.  A copy of the press  release is  attached
hereto as Exhibit (a)(12) and is incorporated herein by reference.


Item 12.        Exhibits.

     Item 12 of the Schedule TO is hereby  amended and  supplemented  to add the
following exhibit:

     (a)(12) Press Release, dated June 4, 2002.



                                   SIGNATURE

     After due inquiry  and to the best of my  knowledge  and belief,  I certify
that the information set forth in this statement is true, complete and correct.


                                   TESTCO ACQUISITION CORP.


                                   By:  /s/ Michael Gorin
                                        -----------------
                                   Name:  Michael Gorin
                                   Title:    President


                                   AEROFLEX INCORPORATED

                                   By:  /s/ Michael Gorin
                                        -----------------
                                   Name:  Michael Gorin
                                   Title: President and Chief Financial Officer



Dated:  June 4, 2002