Document:

PROTOCOL SYSTEMS, INC.

                        AMENDMENT TO EXECUTIVE EMPLOYMENT AGREEMENT

PARTIES:    Protocol Systems, Inc. ("Company")
            8500 SW Creekside Place
            Beaverton, OR 97008

            Carl P. Holstein ("Executive")
            10880 SW Avocet Court
            Beaverton, OR 97007

DATE: March 1, 2000

                                        RECITALS:

     A.    The Company and the Executive have entered into an Executive
Employment Agreement dated as of July 1, 1998 (the "Employment Agreement").

     B.    The Company and the Executive now desire to modify certain
provisions of the Employment Agreement.

     NOW, THEREFORE, for valuable consideration the receipt and sufficiency of
which is hereby acknowledged, the parties agree as follows:

     1.    Capitalized terms used herein but not defined herein have their
defined meanings as set forth in the Employment Agreement.

     2.    Section 2.3 of the Employment Agreement is hereby amended and
restated in its entirety as follows:

     2.3 TERM. This Agreement shall remain in effect until the earlier of
     (i) termination pursuant to Article 4 or Article 6 of this Agreement or
     (ii) three (3) years from the date of this Agreement, provided however
     that if a Change of Control occurs within three (3) years from the date of
     this Agreement, then this Agreement shall remain in effect for two (2)
     years from the date of the first Change of Control event described in
     Section 6.1.1.

     3.    Section 6.2.1 of the Employment Agreement is hereby amended and
restated in its entirety as follows:

     6.2.1 Change of Control Termination Payment.  In the event of a Change of
     Control Termination as defined in Section 6.1.2, without further action by
     the Board, the Company shall, within thirty (30) days of such termination,
     make a lump sum payment to the Executive, equal to two (2) years' Base
     Salary.

     4.    Section 6.5 of the Employment Agreement is hereby amended and
restated in its entirety as follows:

     6.5 Vesting of Stock Options. All unvested stock options held by
     Executive, if any, shall vest immediately upon a Change of Control
     Termination as defined in Section 6.1.2. Executive may exercise such
     options in accordance with the terms and conditions of the stock option
     plan and the agreement pursuant to which such options were granted.

     5.    Except as set forth and amended and restated herein, the Employment
Agreement shall remain unchanged and in full force and effect.

     IN WITNESS WHEREOF, the parties have caused this Amendment to Executive
Employment Agreement to be duly executed on the day and year first written
above.

EXECUTIVE                                 PROTOCOL SYSTEMS, INC.

____________________________________      By:___________________________________
Carl P. Holstein                          Title:________________________________PROTOCOL SYSTEMS, INC.

                        AMENDMENT TO EXECUTIVE EMPLOYMENT AGREEMENT

PARTIES:    Protocol Systems, Inc. ("Company")
            8500 SW Creekside Place
            Beaverton, OR 97008

            James P. Welch ("Executive")
            14340 SW Hazelhill
            Tigard, OR 97224

DATE: March 1, 2000

                                        RECITALS:

     A.    The Company and the Executive have entered into an Executive
Employment Agreement dated as of July 1, 1998 (the "Employment Agreement").

     B.    The Company and the Executive now desire to modify certain
provisions of the Employment Agreement.

     NOW, THEREFORE, for valuable consideration the receipt and sufficiency of
which is hereby acknowledged, the parties agree as follows:

     1.    Capitalized terms used herein but not defined herein have their
defined meanings as set forth in the Employment Agreement.

     2.    Section 2.3 of the Employment Agreement is hereby amended and
restated in its entirety as follows:

     2.3 TERM. This Agreement shall remain in effect until the earlier of (i)
     termination pursuant to Article 4 or Article 6 of this Agreement or (ii)
     three (3) years from the date of this Agreement, provided however that if
     a Change of Control occurs within three (3) years from the date of this
     Agreement, then this Agreement shall remain in effect for two (2) years
     from the date of the first Change of Control event described in Section
     6.1.1.

     3.    Section 6.2.1 of the Employment Agreement is hereby amended and
restated in its entirety as follows:

     6.2.1 Change of Control Termination Payment.  In the event of a Change of
     Control Termination as defined in Section 6.1.2, without further action by
     the Board, the Company shall, within thirty (30) days of such termination,
     make a lump sum payment to the Executive, equal to two (2) years' Base
     Salary.

     4.    Section 6.5 of the Employment Agreement is hereby amended and
restated in its entirety as follows:

     6.5 Vesting of Stock Options. All unvested stock options held by
     Executive, if any, shall vest immediately upon a Change of Control
     Termination as defined in Section 6.1.2. Executive may exercise such
     options in accordance with the terms and conditions of the stock option
     plan and the agreement pursuant to which such options were granted.

     5.    Except as set forth and amended and restated herein, the Employment
Agreement shall remain unchanged and in full force and effect.

     IN WITNESS WHEREOF, the parties have caused this Amendment to Executive
Employment Agreement to be duly executed on the day and year first written
above.

EXECUTIVE                                 PROTOCOL SYSTEMS, INC.

_____________________________________     By:___________________________________
James P. Welch                            Title:________________________________PROTOCOL SYSTEMS, INC.

                       AMENDMENT TO EXECUTIVE EMPLOYMENT AGREEMENT

PARTIES:    Protocol Systems, Inc. ("Company")
            8500 SW Creekside Place
            Beaverton, OR 97008

            James P. Fee ("Executive")
            13645 NW Lariat Court
            Portland, OR 97229

DATE: March 1, 2000

                                      RECITALS:

     A.    The Company and the Executive have entered into an Executive
Employment Agreement dated as of July 1, 1998 (the "Employment Agreement").

     B.    The Company and the Executive now desire to modify certain
provisions of the Employment Agreement.

     NOW, THEREFORE, for valuable consideration the receipt and sufficiency of
which is hereby acknowledged, the parties agree as follows:

     1.    Capitalized terms used herein but not defined herein have their
defined meanings as set forth in the Employment Agreement.

     2.    Section 2.3 of the Employment Agreement is hereby amended and
restated in its entirety as follows:

     2.3 TERM. This Agreement shall remain in effect until the earlier of (i)
     termination pursuant to Article 4 or Article 6 of this Agreement or (ii)
     three (3) years from the date of this Agreement, provided however that if
     a Change of Control occurs within three (3) years from the date of this
     Agreement, then this Agreement shall remain in effect for two (2) years
     from the date of the first Change of Control event described in Section
     6.1.1.

     3.    Section 6.2.1 of the Employment Agreement is hereby amended and
restated in its entirety as follows:

     6.2.1 Change of Control Termination Payment.  In the event of a Change of
     Control Termination as defined in Section 6.1.2, without further action by
     the Board, the Company shall, within thirty (30) days of such termination,
     make a lump sum payment to the Executive, equal to two (2) years' Base
     Salary.

     4.    Section 6.5 of the Employment Agreement is hereby amended and
restated in its entirety as follows:

     6.5 Vesting of Stock Options. All unvested stock options held by
     Executive, if any, shall vest immediately upon a Change of Control
     Termination as defined in Section 6.1.2. Executive may exercise such
     options in accordance with the terms and conditions of the stock option
     plan and the agreement pursuant to which such options were granted.

     5.    Except as set forth and amended and restated herein, the Employment
Agreement shall remain unchanged and in full force and effect.

     IN WITNESS WHEREOF, the parties have caused this Amendment to Executive
Employment Agreement to be duly executed on the day and year first written
above.

EXECUTIVE                                  PROTOCOL SYSTEMS, INC.

____________________________________       By:_________________________________
James P. Fee                               Title:______________________________PROTOCOL SYSTEMS, INC.

                        AMENDMENT TO EXECUTIVE EMPLOYMENT AGREEMENT

PARTIES:    Protocol Systems, Inc. ("Company")
            8500 SW Creekside Place
            Beaverton, OR 97008

            Richard Roa ("Executive")
            7918 SW 189th Avenue
            Beaverton, OR 97007

DATE: March 1, 2000

                                        RECITALS:

     A.    The Company and the Executive have entered into an Executive
Employment Agreement dated as of July 13, 1998 (the "Employment Agreement").

     B.    The Company and the Executive now desire to modify certain
provisions of the Employment Agreement.

     NOW, THEREFORE, for valuable consideration the receipt and sufficiency of
which is hereby acknowledged, the parties agree as follows:

     1.    Capitalized terms used herein but not defined herein have their
defined meanings as set forth in the Employment Agreement.

     2.    Section 2.3 of the Employment Agreement is hereby amended and
restated in its entirety as follows:

     2.3 TERM. This Agreement shall remain in effect until the earlier of (i)
     termination pursuant to Article 4 or Article 6 of this Agreement or (ii)
     three (3) years from the date of this Agreement, provided however that if
     a Change of Control occurs within three (3) years from the date of this
     Agreement, then this Agreement shall remain in effect for two (2) years
     from the date of the first Change of Control event described in Section
     6.1.1.

     3.    Section 6.2.1 of the Employment Agreement is hereby amended and
restated in its entirety as follows:

     6.2.1 Change of Control Termination Payment.  In the event of a Change of
     Control Termination as defined in Section 6.1.2, without further action by
     the Board, the Company shall, within thirty (30) days of such termination,
     make a lump sum payment to the Executive, equal to one (1) years' Base
     Salary.

     4.    Section 6.5 of the Employment Agreement is hereby amended and
restated in its entirety as follows:

     6.5 Vesting of Stock Options. All unvested stock options held by
     Executive, if any, shall vest immediately upon a Change of Control
     Termination as defined in Section 6.1.2. Executive may exercise such
     options in accordance with the terms and conditions of the stock option
     plan and the agreement pursuant to which such options were granted.

     5.    Except as set forth and amended and restated herein, the Employment
Agreement shall remain unchanged and in full force and effect.

     IN WITNESS WHEREOF, the parties have caused this Amendment to Executive
Employment Agreement to be duly executed on the day and year first written
above.

EXECUTIVE                                 PROTOCOL SYSTEMS, INC.

_______________________________________   By:___________________________________
Richard Roa                               Title:________________________________

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