Document:

EXHIBIT 4(d)

                    AMENDMENT NO.1 TO SUB-ADVISORY AGREEMENT

      THIS AMENDMENT NO.1 (THE "AMENDMENT") TO THE SUB-ADVISORY AGREEMENT (the
"Sub-Advisory Agreement"), dated as of August 31, 1992, by and among MERRILL
LYNCH (SUISSE) INVESTMENT MANAGEMENT S.A., a corporation organized under the
laws of Switzerland (hereinafter referred to as "MLSIM"), MERRILL LYNCH ASSET
MANAGEMENT U.K. LTD., a corporation organized under the laws of England and
Wales (hereinafter referred to as "MLAM U.K."), and MERRILL LYNCH CONSULTS
INTERNATIONAL PORTFOLIO, an unincorporated business trust under the laws of the
Commonwealth of Massachusetts (the "Fund"), is made and entered into as of
September 23, 1999.

                              PRELIMINARY STATEMENT

      WHEREAS, the parties hereto desire to amend the Sub-Advisory Agreement as
set forth in this Amendment.

      NOW, THEREFORE, in consideration of the premises, the mutual covenants,
and agreements contained herein and other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the parties hereto
agree as follows:

      1. Defined Terms. Except as defined herein, all capitalized terms used
      herein shall have the respective meanings ascribed to them in the
      Sub-Advisory Agreement.

      2. Amendments to Sub-Advisory Agreement. The Sub-Advisory Agreement is
      hereby amended as follows:

            a. by deleting the fourth WHEREAS clause thereof and replacing it in
            its entirety with the following WHEREAS clause:

                  "WHEREAS, MLAM U.K. is willing to provide to MLSIM certain
            investment advisory services with respect to the day-to-day
            investment management of the Fund on the terms and conditions
            hereinafter set forth."

            b. by amending Article I thereof to read in full as follows:

                                    ARTICLE I
                               DUTIES OF MLAM U.K.

                  "MLSIM hereby employs MLAM U.K. to act as sub-adviser to MLSIM
            and to furnish, or arrange for affiliates to furnish, certain
            investment advisory services with respect to the day-to-day
            investment management of the Fund, as described below, subject to
            the supervision of MLSIM and the Trustees of the
<PAGE>

            Fund, for the period and on the terms and conditions set forth in
            this Agreement. MLAM U.K. hereby accepts such employment and agrees
            during such period to render, or arrange for the rendering of, such
            services and to assume the obligations herein set forth for the
            compensation from MLSIM provided for herein. MLAM U.K. and its
            affiliates shall for all purposes herein be deemed to be an
            independent contractor and shall, unless otherwise expressly
            provided or authorized, have no authority to act for or represent
            the Fund in any way or otherwise be deemed an agent of the Fund.

                  MLAM U.K. shall provide MLSIM with such investment research,
            advice, and supervision as the latter may from time to time consider
            necessary for the proper management of the Fund for which MLSIM
            determines MLAM U.K. shall serve as sub-advisor. All advice and
            recommendations provided by MLAM U.K. shall be subject to the
            restrictions of the Declaration of Trust and By-Laws of the Fund, as
            amended from time to time, the provisions of the Investment Company
            Act, and the statements relating to the Fund's investment
            objectives, investment policies, and investment restrictions as the
            same are set forth in the currently effective prospectus and
            statement of additional information relating to the shares of the
            Fund under the Securities Act of 1933, as amended (the "Prospectus"
            and "Statement of Additional Information," respectively)."

      3. Counterparts. This Amendment may be executed in one or more
      counterparts, each of which for all purposes shall be deemed to be an
      original, and all of which when taken together shall constitute but one
      and the same instrument.

      4. Miscellaneous. Except as modified herein, all of the terms and
      conditions of the Sub-Advisory Agreement, as heretofore in effect, shall
      remain in full force and effect and, as modified hereby, the Sub-Advisory
      Agreement is hereby ratified and confirmed in all respects.

                                        2
<PAGE>

                                            MERRILL LYNCH (SUISSE) INVESTMENT
                                            MANAGEMENT S.A.

                                            By:      /s/ Jurg Boller
                                               ---------------------------------
                                                     Name: Jurg Boller
                                                     Title: Director

                                            MERRILL LYNCH ASSET MANAGEMENT
                                            U.K. LTD.

                                            By:      /s/ Terry K. Glenn
                                               ---------------------------------
                                                     Name: Terry K. Glenn
                                                     Title: Director

                                            MERRILL LYNCH CONSULTS
                                            INTERNATIONAL PORTFOLIO

                                            By:      /s/ Terry K. Glenn
                                               ---------------------------------
                                                     Name: Terry K. Glenn
                                                     Title: Director

                                        3<PAGE>   1
                                                                    EXHIBIT 4.1

   NUMBER                                                             SHARES

COMMON STOCK              [REPEATER TECHNOLOGIES LOGO]             COMMON STOCK

THIS CERTIFICATE IS TRANSFERABLE
IN BOSTON, MA OR NEW YORK, NY

              INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE

                                                               CUSIP __________

THIS CERTIFIES THAT                                  SEE REVERSE FOR CERTAIN
                                                   DEFINITIONS AND A STATEMENT
                                                  AS TO THE RIGHTS, PREFERENCES,
                                                   PRIVILEGES AND RESTRICTIONS
                                                            OF SHARES

IS THE OWNER OF

            FULLY PAID AND NONASSESSABLE SHARES OF THE COMMON STOCK,
                         $0.001 PAR VALUE PER SHARE, OF

                          REPEATER TECHNOLOGIES, INC.

transferable on the books of the Corporation in person or by duly authorized
attorney upon surrender of this Certificate properly endorsed. This Certificate
is not valid until countersigned and registered by the Transfer Agent and
Registrar.

     WITNESS the facsimile seal of the Corporation and the facsimile signatures
of its duly authorized officers.

Dated:

                          REPEATER TECHNOLOGIES, INC.
                                CORPORATE SEAL
CHIEF FINANCIAL OFFICER       FEBRUARY 11, 2000                   PRESIDENT
                                    DELAWARE

COUNTERSIGNED AND REGISTERED
    U.S. STOCK TRANSFER CORPORATION
      TRANSFER AGENT AND REGISTRAR

By:

               AUTHORIZED SIGNATURE

<PAGE>   2
                          REPEATER TECHNOLOGIES, INC.

     A statement of the powers, designations, preferences and relative,
participating, optional or other special rights of each class of stock or series
thereof and the qualifications, limitations or restrictions of such preferences
and/or rights as established, from time to time, by the Certificate of
Incorporation of the Corporation and by any certificate of determination, the
number of shares constituting each class and series, and the designations
thereof, may be obtained by the holder hereof upon request and without charge at
the principal office of the Corporation.

     The following abbreviations, when used in the inscription on the face of
this certificate, shall be construed as through they were written out in full
according to applicable laws or regulations:

<TABLE>
     <S>                                                <C>
     TEN COM  - as tenants in common                    UNIF GIFT MIN ACT - _______________ Custodian _______________
                                                                                 (Cust)                   (Minor)
     TEN ENT  - as tenants by the entireties                                under Uniform Gifts to Minors
                                                                            Act _________________________
     JT TEN   - as joint tenants with right of                                          (State)
                survivorship and not as tenants         UNIF TRF MIN ACT - ________________ Custodian (until age ____)
                in common                                                        (Cust)
                                                                           ___________________ under Uniform Transfers
                                                                                 (Minor)
                                                                           to Minors Act _____________________________
                                                                                                    (State)
</TABLE>

    Additional abbreviations may also be used though not in the above list.

FOR VALUE RECEIVED _______________________ hereby sell, assign and transfer unto

PLEASE INSERT SOCIAL SECURITY OR OTHER
    IDENTIFYING NUMBER OF ASSIGNEE
______________________________________

________________________________________________________________________________
 (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE)

________________________________________________________________________________

________________________________________________________________________________

_________________________________________________________________________ Shares
of the common stock represented by the within Certificate, and do hereby
irrevocably constitute and appoint

_______________________________________________________________________ Attorney
to transfer the said Stock on the books of the within-named Corporation with
full power of substitution in the premises.

Dated ________________________________

                                     X _______________________________________

                                     X _______________________________________
                                     NOTICE: THE SIGNATURE(S) OF THIS ASSIGNMENT
                                     MUST CORRESPOND WITH THE NAME(S) AS WRITTEN
                                     UPON THE FACE OF THE CERTIFICATE IN
                                     EVERY PARTICULAR WITHOUT ALTERATION OR
                                     ENLARGEMENT OR ANY CHANGE WHATEVER.

SIGNATURE GUARANTEED

By _______________________________________________________________________
THE SIGNATURE(S) MUST BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION
(BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH
MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM), PURSUANT
TO S.E.C. RULE 17Ad-15.

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