[Heller Ehrman White & McAuliffe LLP Letterhead]

June 26, 2001
                                          Victor A. Hebert
                                          vhebert@hewm.com
                                          (415) 772-6136
                                          Main (415) 772-6000
                                          Fax (415) 772-6268

                                           11410-0029
Mr. Frank Lanza
Chairman and Chief Executive Officer
L-3 Communications Corporation
600 Third Avenue
New York, New York  10016

Dear Mr. Lanza:

     We are attorneys for Datron Systems Incorporated ("Datron") which has
requested that we respond to your letter dated June 25, 2001 addressed
to George M. Ball (the "June 25 Letter") with copies to David A. Derby and
C. Duncan Soukup.

     The June 25 Letter repeatedly mischaracterizes your correspondence and
telephone conversations with Mr. Ball as "offers" by L-3 Communications
Corporation ("L-3") to acquire Datron.  Instead, they were mere expressions
of interest in a potential transaction.  Initially, L-3 communicated its
interest to a minority stockholder of Datron, not to Datron directly, and on
terms apparently suggested to L-3 by the minority stockholder without any
input from or involvement by Datron.  Even so, Datron instructed Philpott
Ball & Werner to contact L-3 and request that its interest be communicated
to Datron directly.  When L-3 communicated its interest to Datron, Philpott
Ball & Werner, on Datron's behalf, objected to various terms in writing.
Your oral response to Mr. Ball indicated some flexibility by L-3 on the
objectionable terms, but L-3 continued to insist upon a 60 day exclusivity
period.

     During this period The Titan Corporation ("Titan") made a firm offer to
acquire Datron.  Datron and its board of directors was highly confident
that definitive agreements could be negotiated with Titan rapidly; and
the Titan transaction was documented expeditiously.

     Datron has recent experience with L-3's prior expressions of interest
in acquiring part or all of Datron.  Based upon these prior discussions
and dealings with L-3 and with you during the past year and problems
perceived with L-3's expressions of interest, Datron and its board had
little confidence in the likelihood that a potential transaction
with L-3 could be accomplished on appropriate terms.  It also was not
possible to proceed with L-3's request for exclusivity without
simultaneously jeopardizing a firm and favorable transaction with Titan.



[Heller Ehrman Logo]                                    Mr. Frank Lanza
                                                          June 26, 2001
                                                                 Page 2



The Datron board of directors objects strongly to and disagrees
vehemently with your statement in the June 25 Letter that the board
acted "without regard to its fiduciary duty".  The Datron board at
all times acted responsibly and in what it believed in the circumstances
to be in the best interests of all of the stockholders of Datron.

                             Very truly yours,


                             VICTOR A. HEBERT
                             Victor A. Hebert


cc:	David A. Derby
        George M. Ball
        C. Duncan Soukup