CHANGE IN TERMS AGREEMENT                         EXHIBIT 10.31


Borrower:  California Amplifier, Inc.     Lender:  California United Bank
            460 Calle San Pablo             Encino Commercial Loan Center
            Camarillo, CA  93012                   16030 Ventura Boulevard
                                                   Encino, CA  91436

Principal Amount:  $6,000,000.00    Date of Agreement:  August 22, 1997

DESCRIPTION OF EXISTING  INDEBTEDNESS.  A Promissory  Note dated as of August 6,
1996, in the original principal amount of $6,000,000.00, executed by Borrower in
favor of Lender.

DESCRIPTION OF  COLLATERAL.  This Note is secured by the Collateral as described
in that certain Commercial Security Agreement,  dated as of July 26, 1995, as it
may amended,  modified,  supplemented,  replaced or restated, from time to time,
executed by Grantor in favor of Lender.

DESCRIPTION OF CHANGE IN TERMS. The maturity date is amended from August 4, 1997
to August 3, 1998.  Regularly scheduled monthly interest payments shall continue
to be due and payable as provided in said Note, commencing September 1, 1997.

PROMISE TO PAY.  California  Amplifier,  Inc.  ("Borrower")  promises  to pay to
California  United  Bank  ("Lender"),  or order,  in lawful  money of the United
States  of  America,  the  principal  amount  of Six  Million  & 00/100  Dollars
($6,000,000.00) or so much as may be outstanding,  together with interest on the
unpaid  outstanding  principal  balance  of  each  advance.  Interest  shall  be
calculated from the date of each advance until repayment of each advance.

ARBITRATION.   Lender  and  Borrower   agree  that  all  disputes,   claims  and
controversies  between  them,  whether  individual,  joint,  or class in nature,
arising from this Agreement or otherwise,  including without limitation contract
and tort  disputes,  shall be  arbitrated  pursuant to the Rules of the American
Arbitration Association, upon request of either party. No act to take or dispose
of any  collateral  securing this  Agreement  shall  constitute a waiver of this
arbitration  agreement or be  prohibited  by this  arbitration  agreement.  This
includes,  without  limitation,  obtaining  injunctive  relief  or  a  temporary
restraining order; invoking a power of sale under any deed of trust or mortgage;
obtaining a writ of attachment or  imposition of a receiver;  or exercising  any
rights  relating to personal  property,  including  taking or  disposing of such
property with or without  judicial  process pursuant to Article 9 of the Uniform
Commercial  Code.  Any  disputes,   claims,  or  controversies   concerning  the
lawfulness or  reasonableness  of any act, or exercise of any right,  concerning
any collateral securing this Agreement,  including any claim to rescind, reform,
or otherwise  modify any  agreement  relating to the  collateral  securing  this
Agreement,  shall also be arbitrated,  provided however that no arbitrator shall
have the right or the power to enjoin or restrain  any act of any party.  Lender
and  Borrower  agree  that in the event of an action  for  judicial  foreclosure
pursuant  to  California  Code of Civil  Procedure  Section  726, or any similar
provision  in any other  state,  the  commencement  of such an  action  will not
constitute  a waiver of the right to  arbitrate  and the  court  shall  refer to
arbitration as much of such action, including counterclaims,  as lawfully may be
referred to arbitration.  Judgment upon any award rendered by any arbitrator may
be entered in any court having  jurisdiction.  Nothing in this  Agreement  shall
preclude  any party from  seeking  equitable  relief  from a court of  competent
jurisdiction. The statute of limitations,  estoppel, waiver, laches, and similar
doctrines  which would  otherwise be applicable in an action  brought by a party
shall be applicable in any arbitration  proceeding,  and the  commencement of an
arbitration  proceeding  shall be deemed the commencement of an action for these
purposes.   The  Federal  Arbitration  Act  shall  apply  to  the  construction,
interpretation, and enforcement of this arbitration provision.

CONTINUING VALIDITY. Except as expressly changed by this Agreement, the terms of
the original  obligation or obligations,  including all agreements  evidenced or
securing  the  obligation(s),  remain  unchanged  and in full force and  effect.
Consent  by Lender to this  Agreement  does not waive  Lender's  right to strict
performance of the  obligation(s)  as changed,  nor obligate  Lender to make any
future change in terms. Nothing in this Agreement will constitute a satisfaction
of the obligation(s).  It is the intention of Lender to retain as liable parties
all makers and endorsers of the original obligation(s),  including accommodation
parties, unless a party is expressly released by Lender in writing. Any maker or
endorser, including accommodation makers, will not be released by virtue of this
Agreement.  If any person who signed the original  obligation does not sign this
Agreement below,  then all persons signing below acknowledge that this Agreement
is  given  conditionally,  based  on  the  representation  to  Lender  that  the
non-signing  party  consents to the changes and  provisions of this Agreement or
otherwise  will not be  released  by it.  This  waiver  applies  not only to any
initial  extension,  modification  or release,  but also to all such  subsequent
actions.

PRIOR TO SIGNING THIS AGREEMENT, BORROWER READ AND UNDERSTOOD ALL THE
PROVISIONS OF THIS AGREEMENT, INCLUDING THE VARIABLE INTEREST RATE
PROVISIONS.  BORROWER AGREES TO THE TERMS OF THE AGREEMENT AND ACKNOWLEDGES
RECEIPT OF A COMPLETED COPY OF THE AGREEMENT.

BORROWER:

California Amplifier, Inc.


By:/s/  Michael Ferron, Chief Financial Officer

LENDER:

California United Bank


By: /s/ Authorized Officer