content: <PAGE>
  
                        SECURITIES EXCHANGE AND COMMISSION
                             Washington, D. C.  20549
  
                                     FORM 8-K
  
                                  CURRENT REPORT
  
                      Pursuant to Section 13 or 15(d) of the
                          Securities Exchange Act of 1934
  
         Date of Report (Date of earliest event reported):  July 10, 2000
  
                          Adaptive Broadband Corporation
              (Exact name of registrant as specified in its charter)
  
                                     Delaware
                  (State or other jurisdiction of incorporation)
  
        000-7428                                           94-1668412
  (Commission File No.)                       (I.R.S. Employer Identification No.)
  
  
                               1143 Borregas Avenue
                                Sunnyvale, CA 94089
               (Address of principal executive offices and zip code)
  
        Registrant's telephone number, including area code: (408) 732-4000
  <PAGE>
  
  Item 2.   Acquisition or Disposition of Assets.
  
       A.   Sale of Assets to Comtech Telecommunications Corp.
  
            On July 10, 2000, the registrant, Adaptive Broadband Corporation (the
  "Company"), sold to Comtech Telecommunications Corp. ("Comtech") substantially
  all the assets relating to the Company and its unincorporated division's
  business of manufacturing and marketing satellite modems, receivers and related
  equipment (the "EF Data Business"), and Comtech assumed certain liabilities of
  the EF Data Business, pursuant to that certain Amended and Restated Asset
  Purchase Agreement (the "EF Data Agreement"), dated as of July 10, 2000, by and
  between Comtech and the Company (the "EF Data Sale").  A copy of the EF Data
  Agreement is attached as Exhibit 2.1.  As consideration for the EF Data Sale,
  the Company received from Comtech at the closing an aggregate purchase price of
  Sixty One Million Five Hundred Thousand Dollars ($61,500,000), which is subject
  to adjustment under certain circumstances set forth in the EF Data Agreement.
  
       B.   Sale of Assets to Microwave Data Systems Inc.
  
            On July 14, 2000, the Company sold to Microwave Data Systems Inc.
  ("Microwave"), a wholly owned subsidiary of Moseley Associates Incorporated
  ("Moseley"), substantially all the assets relating to the Company and its
  unincorporated division's business of the design, manufacture and sale of low
  speed microwave data transmitters (the "MDS Business"), and Microwave assumed
  certain liabilities of the MDS Business, pursuant to that certain Asset Purchase
  Agreement (the "MDS Agreement"), dated as of June 14, 2000, by and among
  Microwave, Moseley and the Company (the "MDS Sale"). A copy of the MDS Agreement
  is attached as Exhibit 2.2. As consideration for the MDS Sale, the Company
  received from Microwave at the closing an aggregate purchase price of Thirty
  Eight Million Two Hundred Fifty Three Thousand Dollars ($38,253,000), which is
  subject to adjustment under certain circumstances set forth in the MDS
  Agreement.
  <PAGE>
  
  Item 7.   Exhibits.
  
            Exhibit
            Number       Exhibit
  
            2.1          Amended and Restated Asset Purchase Agreement, dated as
                         of July 10, 2000, by and between Comtech
                         Telecommunications Corp. and Adaptive Broadband
                         Corporation.
  
            2.2          Asset Purchase Agreement, dated as of June 14, 2000, by
                         and among Microwave Data Systems Inc., Moseley Associates
                         Incorporated and Adaptive Broadband Corporation.
  <PAGE>
  
                                     SIGNATURE
  
       Pursuant to the requirements of the Securities Exchange Act of 1934, the
  registrant has duly caused this report to be signed on its behalf by the
  undersigned, thereunto duly authorized.
  
                                         Adaptive Broadband Corporation
  
  Dated:  July 25, 2000                  By:  /s/ Kenneth J. Wees
                                              -----------------------------------
                                              Vice President
                                              General Counsel and
                                              Secretary
  <PAGE>
  
                                   EXHIBIT INDEX
  
       Exhibit
       Number       Description
  
       2.1          Amended and Restated Asset Purchase Agreement, dated as of
                    July 10, 2000, by and between Comtech Telecommunications Corp.
                    and Adaptive Broadband Corporation.
  
       2.2          Asset Purchase Agreement, dated as of June 14, 2000, by and
                    among Microwave Data Systems Inc., Moseley Associates
                    Incorporated and Adaptive Broadband Corporation.
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metadata_filer: {"company-data": {"conformed-name": "ADAPTIVE BROADBAND CORP", "cik": "0000016357", "assigned-sic": "3663", "irs-number": "941668412", "state-of-incorporation": "DE", "fiscal-year-end": "0630"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-07428", "film-number": "678458"}, "business-address": {"street1": "1143 BORREGAS AVE", "city": "SUNNYVALE", "state": "CA", "zip": "94089", "phone": "4087324000"}, "mail-address": {"street1": "ADAPTIVE BROADBAND CORPORATION", "street2": "1143 BORREGAS AVE", "city": "SUNNYVALE", "state": "CA", "zip": "94089"}, "former-company": {"former-conformed-name": "CALIFORNIA MICROWAVE INC", "date-changed": "19920703"}}
text: SECURITIES EXCHANGE AND COMMISSION
                             Washington, D. C.  20549
  
                                     FORM 8-K
  
                                  CURRENT REPORT
  
                      Pursuant to Section 13 or 15(d) of the
                          Securities Exchange Act of 1934
  
         Date of Report (Date of earliest event reported):  July 10, 2000
  
                          Adaptive Broadband Corporation
              (Exact name of registrant as specified in its charter)
  
                                     Delaware
                  (State or other jurisdiction of incorporation)
  
        000-7428                                           94-1668412
  (Commission File No.)                       (I.R.S. Employer Identification No.)
  
                               1143 Borregas Avenue
                                Sunnyvale, CA 94089
               (Address of principal executive offices and zip code)
  
        Registrant's telephone number, including area code: (408) 732-4000
  Item 2.   Acquisition or Disposition of Assets.
  
       A.   Sale of Assets to Comtech Telecommunications Corp.
  
            On July 10, 2000, the registrant, Adaptive Broadband Corporation (the
  "Company"), sold to Comtech Telecommunications Corp. ("Comtech") substantially
  all the assets relating to the Company and its unincorporated division's
  business of manufacturing and marketing satellite modems, receivers and related
  equipment (the "EF Data Business"), and Comtech assumed certain liabilities of
  the EF Data Business, pursuant to that certain Amended and Restated Asset
  Purchase Agreement (the "EF Data Agreement"), dated as of July 10, 2000, by and
  between Comtech and the Company (the "EF Data Sale").  A copy of the EF Data
  Agreement is attached as Exhibit 2.1.  As consideration for the EF Data Sale,
  the Company received from Comtech at the closing an aggregate purchase price of
  Sixty One Million Five Hundred Thousand Dollars ($61,500,000), which is subject
  to adjustment under certain circumstances set forth in the EF Data Agreement.
  
       B.   Sale of Assets to Microwave Data Systems Inc.
  
            On July 14, 2000, the Company sold to Microwave Data Systems Inc.
  ("Microwave"), a wholly owned subsidiary of Moseley Associates Incorporated
  ("Moseley"), substantially all the assets relating to the Company and its
  unincorporated division's business of the design, manufacture and sale of low
  speed microwave data transmitters (the "MDS Business"), and Microwave assumed
  certain liabilities of the MDS Business, pursuant to that certain Asset Purchase
  Agreement (the "MDS Agreement"), dated as of June 14, 2000, by and among
  Microwave, Moseley and the Company (the "MDS Sale"). A copy of the MDS Agreement
  is attached as Exhibit 2.2. As consideration for the MDS Sale, the Company
  received from Microwave at the closing an aggregate purchase price of Thirty
  Eight Million Two Hundred Fifty Three Thousand Dollars ($38,253,000), which is
  subject to adjustment under certain circumstances set forth in the MDS
  Agreement.
  Item 7.   Exhibits.
  
            Exhibit
            Number       Exhibit
  
            2.1          Amended and Restated Asset Purchase Agreement, dated as
                         of July 10, 2000, by and between Comtech
                         Telecommunications Corp. and Adaptive Broadband
                         Corporation.
  
            2.2          Asset Purchase Agreement, dated as of June 14, 2000, by
                         and among Microwave Data Systems Inc., Moseley Associates
                         Incorporated and Adaptive Broadband Corporation.
  SIGNATURE
  
       Pursuant to the requirements of the Securities Exchange Act of 1934, the
  registrant has duly caused this report to be signed on its behalf by the
  undersigned, thereunto duly authorized.
  
                                         Adaptive Broadband Corporation
  
  Dated:  July 25, 2000                  By:  /s/ Kenneth J. Wees
                                              -----------------------------------
                                              Vice President
                                              General Counsel and
                                              Secretary
  EXHIBIT INDEX
  
       Exhibit
       Number       Description
  
       2.1          Amended and Restated Asset Purchase Agreement, dated as of
                    July 10, 2000, by and between Comtech Telecommunications Corp.
                    and Adaptive Broadband Corporation.
  
       2.2          Asset Purchase Agreement, dated as of June 14, 2000, by and
                    among Microwave Data Systems Inc., Moseley Associates
                    Incorporated and Adaptive Broadband Corporation.