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                                                                 EXHIBIT  10.15
[Teradyne, Inc. Letterhead]

Mr. John E. Halter
576 E. Crescent Drive
Palo Alto, CA 94301

                                January 24, 1997

Dear Jack:

The purpose of this letter is to confirm our agreement regarding your employment
status.

As we discussed, effective with the date of this letter, you resign from any and
all  offices  and  directorships  which you hold at  Teradyne,  Inc.  and any of
Teradyne's  subsidiaries or their subsidiaries and branches.  However, you shall
remain an employee of Teradyne in  accordance  with the terms  described in your
Employment Agreement dated December 1, 1995, as modified in this letter.

You will  remain an  employee  through  November  30,  1997,  at which time your
employment  will cease,  unless earlier  terminated for cause in accordance with
the  December 1, 1995  Employment  agreement.  During  this period your  monthly
compensation  will be  $22,917.00  per month,  and we expect you may be asked to
devote as much as 50% of your time to Teradyne,  as  requested  by us.  However,
should you find another job,  which we agree is not  competitive  with Teradyne,
before December 1, 1997, your salary will be reduced to $1,000.00 per month.

During your remaining  term of employment  you will not  participate in Teradyne
benefit plans or compensation  programs  (including  Variable  Compensation  and
Profit Sharing),  except that while you are employed solely by Teradyne, you may
continue participation in the following:  health, dental, and vision plans, with
Teradyne paying its normal (approx.  75%) share; life insurance and supplemental
life  insurance  (to the extent you  presently  participate);  and our 401k plan
(however,  you will not be eligible for any company match).  Upon termination of
employment,  in accordance  with COBRA,  you may continue to  participate in the
health,  dental and vision  plans,  at your sole expense for up to 18 months (or
until age 65, which ever comes first).

While you are employed by Teradyne your options will continue to vest 1/16th per
quarter at the end of each of the following quarters: February 28, 1997, May 31,
1997,  August  31,  1997  and  November  30,  1997.  Upon  your  termination  of
employment,  vesting  will  cease,  and you shall have 90 days to  exercise  any
vested and  unexercised  options (but only 30 days for the 350 share ISO grant).
Any unused flex  amounts due you will be paid within 30 days of  termination  of
employment. Also, while you are employed, you will continue to have a voice mail
and e-mail account,  although you will vacate your office no later than March 1,
1997.

Assuming you agree to the above,  please sign the  enclosed  copy of this letter
and return it to me.

                                              Sincerely,
                                              Teradyne, Inc.

                                              /s/ James A. Prestridge
                                              -----------------------
                                              James A. Prestridge
                                              Vice Chairman

Above Agreed to:
By:/s/ John E. Halter               Date: 1/24/97
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   John E. Halter