CUSIP No.     636518  10  2                                 Page 1 of _5_ Pages
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G


                    Under the Securities Exchange Act of 1934

                              (Amendment No. ONE )*


                        NATIONAL INSTRUMENTS CORPORATION
- - --------------------------------------------------------------------------------

                                (Name of Issuer)


                                  COMMON STOCK
- - --------------------------------------------------------------------------------

                         (Title of Class of Securities)


                                   636518 10 2
- - --------------------------------------------------------------------------------

                                 (CUSIP Number)


     *The  remainder  of this cover  page  shall be filled  out for a  reporting
person's  initial  filing of this  form with  respect  to the  subject  class of
securities,  and for any subsequent amendment containing information which would
alter the disclosures  provided in a prior cover page. The information  required
in the  remainder  of this cover page shall not be deemed to be "filed"  for the
purpose  of  Section  18 of the  Securities  Exchange  Act of  1934  ("Act")  or
otherwise  subject to the  liabilities  of that  section of the Act but shall be
subject to all other provisions of the Act (however, see the Notes).






SEC 1745 (2-95)

                                                            Page 1 of _5_ Pages

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CUSIP No.     636518  10  2                                 Page 2 of _5_ Pages
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CUSIP No.  636518  10  2              13G                  Page 2 of _5_ Pages


    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
            JAMES J. TRUCHARD

    2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
            (a)   |_|
            (b)   |_|
    3       SEC USE ONLY


    4       CITIZENSHIP OR PLACE OF ORGANIZATION

            USA
                                5      SOLE VOTING POWER

         NUMBER OF                     6,050,716
           SHARES
        BENEFICIALLY
       OWNED BY EACH
         REPORTING
        PERSON WITH
                   6         SHARED VOTING POWER
                             -0-

                   7         SOLE DISPOSITIVE POWER
                             6,050,716

                   8         SHARED DISPOSITIVE POWER
                             -0-

    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

            6,050,716

    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
            SHARES*


    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
            28.0%

    12      TYPE OF REPORTING PERSON*
            IN


                       *SEE INSTRUCTION BEFORE FILLING OUT


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CUSIP No.     636518  10  2                                 Page 3 of _5_ Pages
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Item 1.
  (a)  Name of Issuer       NATIONAL  INSTRUMENTS  CORPORATION

  (b)  Address of Issuer's Principal Executive Offices
                            6504 Bridge Point Parkway, Austin, TX 78730-5039
Item 2.
  (a)  Name of Person Filing JAMES J. TRUCHARD

  (b)  Address of Principal Business Office or, if none, Residence
                             6504 Bridge Point Parkway, Austin, TX  78730-5039
  (c)  Citizenship
                             USA
  (d)  Title of Class of Securities
                             COMMON STOCK
  (e)  CUSIP Number
                             636518  10  2
Item 3. If this statement is filed pursuant to Rule 13d-1(b), or 13d-2(b),
        check whether the person is a:
  (a) |_| Broker or Dealer registered under Section 15 of the Ac 
  (b) |_| Bank as defined in section 3(a)(6) of the Act 
  (c) |_| Insurance  Company as defined in section  3(a)(19)  of the Act 
  (d) |_| Investment  Company  registered  under section 8 of the Investment 
            Company Act
  (e) |_| Investment Adviser registered under section 203 of the Investment
            Advisers Act of 1940
  (f) |_| Employee  Benefit  Plan,  Pension  Fund which is subject to the
            provisions of the Employee Retirement Income Security Act of 1974 or
            Endowment Fund, see ss.240.13d-1(b)(1)(ii)(F)
  (g) |_| Parent Holding Company, in accordance with ss.240.13d-1(b)(ii)(G)
            (Note: See Item 7)
  (h) |_| Group, in accordance with ss.240.13d-1(b)(1)(ii)(H)

Item 4.  Ownership
  (a)  Amount Beneficially Owned                                    6,050,716*

  (b)  Percent of Class                                                  28.0%

  (c)  Number of shares as to which such person has:

     (i) sole power to vote or to direct the vote                   6,050,716*
    (ii) shared power to vote or to direct the vote             Not Applicable
   (iii) sole power to dispose or direct the disposition of         6,050,716*
    (iv) shared power to dispose or direct the disposition of    Not Applicable

*Includes 540,000 shares held in trust for the benefit of Dr. Truchard for
 which he is trustee.


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CUSIP No.     636518  10  2                                 Page 4 of _5_ Pages
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Item 5.  Ownership of Five Percent or Less of a Class

          If this  statement  is being  filed to report  the fact that as of the
          date hereof the reporting person has ceased to be the beneficial owner
          of more  that  five  percent  of the  class of  securities,  check the
          following |_|.
                  NOT APPLICABLE

Item 6.  Ownership of More than Five Percent on Behalf of Another Person.
                  NOT APPLICABLE

Item 7.  Identification and Classification of the Subsidiary Which Acquired the
         Security Being Reported on By the Parent Holding Company.
                  NOT APPLICABLE

Item 8.  Identification and Classification of Members of the Group
                  NOT APPLICABLE

Item 9.  Notice of Dissolution of Group
                  NOT APPLICABLE

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CUSIP No.     636518  10  2                                 Page 5 of _5_ Pages
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Item 10.
     By signing  below I certify  that,  to the best of my knowledge and belief,
the  securities  referred  to above  were  acquired  in the  ordinary  course of
business  and were not acquired for the purpose of and do not have the effect of
changing or  influencing  the control of the issuer of such  securities and were
not acquired in connection  with or as a participant in any  transaction  having
such purposes or effect.

                           SIGNATURE


     After  reasonable  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.




                           Date  Feb. 13, 1997


                           /s/ JAMES J. TRUCHARD
                           Signature


                           James J. Truchard/President
                           Name/Title


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