Document:

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                                                                     EXHIBIT 4.7

                        RIGHT OF FIRST REFUSAL AGREEMENT

         THIS RIGHT OF FIRST REFUSAL AGREEMENT (the "Agreement") is made and
entered into as of this 30th day of March, 2001, by and among the Investors
listed on Schedule A hereto (each, an "Investor" and collectively, the
"Investors"), SCP Private Equity Partners II, L.P., a Delaware limited
partnership ("SCP"), and USDATA Corporation, a Delaware corporation (the
"Corporation").

                                    RECITALS

         WHEREAS, SCP has agreed to purchase from USDATA Corporation (the
"Company"), and the Company has agreed to issue and sell to SCP, shares of the
Company's Series C-1 Preferred Stock , $0.01 per share ("Series C-1 Stock"), and
to issue to SCP a warrant to purchase shares of the Company's Series C-2
Preferred Stock, $0.01 per share ("Series C-2 Stock"), pursuant to that certain
Series C Preferred Stock Purchase Agreement, dated as of even date herewith (the
"Purchase Agreement"), by and between the Company and SCP;

         WHEREAS, each of the Investors is a holder of shares of the Company's
Common Stock, par value $0.01 per share ("Common Stock"), Series A Preferred
Stock, par value $0.01 per share ("Series A Stock"), and/or Series B Preferred
Stock, par value $0.01 per share ("Series B Stock") (The Common Stock, the
Series A Stock, and the Series B Stock are sometimes hereinafter referred to as
the "Capital Stock.");

         WHEREAS, in order to induce SCP to enter into the Purchase Agreement
and to consummate the transactions contemplated thereby, the Investors have
agreed to grant SCP a right of first refusal with respect to transfers of their
Capital Stock;

         NOW THEREFORE, in consideration of the premises and for other good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto, intending to be legally bound, agree as
follows:

1.       DEFINITIONS.

      1.1 "INVESTOR STOCK" shall mean the shares of the Company's Common Stock
         or Preferred Stock now owned or subsequently acquired by the Investors.

      1.2 "PREFERRED STOCK" shall mean shares of the Series A Stock, the Series
         B Stock, the Series C-1 Stock and Series C-2 Stock.

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      1.3 "TRANSFER" shall include any sale, assignment, encumbrance,
         hypothecation, pledge, conveyance in trust, gift, transfer by request,
         devise or descent, or other transfer or disposition of any kind,
         including, but not limited to, transfers to receivers, levying
         creditors, trustees or receivers in bankruptcy proceedings or general
         assignees for the benefit of creditors, whether voluntary or by
         operation of law, directly or indirectly, of any of the Investor Stock.

2.       TRANSFERS.

      2.1 PROHIBITION ON TRANSFERS. Except as otherwise permitted herein, no
         Investor shall Transfer any Investor Stock unless such Investor has
         complied with all of the terms of this Agreement. Any purported
         Transfer in violation of this Agreement shall be void and ineffective
         and shall not operate to transfer any interest or title to the
         purported transferee. Notwithstanding the foregoing, the prohibition on
         Transfer shall not apply to (a) any existing pledge or hypothecation of
         any Investor Stock, (b) any future pledge or hypothecation by an
         Investor of its Investor Stock if, in the case of such future pledge or
         hypothecation, the proposed pledgee or beneficiary of the hypothecation
         agrees in writing to be bound by the terms of this Agreement, or (c)
         one or more sales pursuant to Rule 144 of the Rules and Regulations
         promulgated by the Securities and Exchange Commission under the
         Securities Act of 1933, as amended, if the number of shares sold during
         any three-month period is not greater than one percent of the
         outstanding shares of the Company's Common Stock at the commencement of
         such three-month period.

      2.2 NOTICE OF TRANSFER. If an Investor proposes to Transfer any shares of
         Investor Stock pursuant to a bona fide offer, then the Investor shall
         promptly give written notice (the "Notice") to SCP at least fifteen
         (15) days prior to the closing of such Transfer. The Notice shall
         describe in reasonable detail the proposed Transfer including, without
         limitation, the number of shares of Investor Stock to be transferred,
         the nature of such Transfer, the consideration to be paid, and the name
         and address of each prospective purchaser or transferee, and shall
         include a copy of the bona fide offer.

      2.3 RIGHT OF FIRST REFUSAL. SCP shall have the right, exercisable upon
         written notice to the Investor (the "Exercise Notice") within five (5)
         days after the receipt of the Notice, to purchase the Investor Stock
         subject to the Notice and on the same terms and conditions as set forth
         therein. SCP shall effect the purchase of the Investor Stock, including
         payment of the purchase price, not more than ten (10) days after
         delivery of the Exercise Notice, and at such time the Investor shall
         deliver to SCP the certificate(s) representing the Investor Stock to be
         purchased by SCP, each certificate to be properly endorsed for
         transfer. In the event that SCP shall not elect to exercise its right
         of first refusal with respect to all of the offered Investor Stock, the
         Investor shall be permitted to Transfer the Investor Stock to the bona
         fide transferee on terms no less favorable to the Investor than the
         terms provided for in the bona fide offer. In the event that such
         Transfer to the bona fide transferee shall not be effectuated within
         sixty (60) days after delivery of the Notice to SCP, any proposed
         Transfer thereafter by the Investor shall become subject to the terms
         of this Agreement.

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3.       LEGEND.

      3.1 Each certificate representing shares of Investor Stock now or
         hereafter owned by the Investors shall be endorsed with the following
         legend:

                  "THE SALE, PLEDGE, HYPOTHECATION OR TRANSFER OF THE SECURITIES
                  REPRESENTED BY THIS CERTIFICATE IS SUBJECT TO THE TERMS AND
                  CONDITIONS OF A RIGHT OF FIRST REFUSAL BY AND BETWEEN THE
                  STOCKHOLDER, THE COMPANY AND CERTAIN HOLDERS OF STOCK OF THE
                  COMPANY. COPIES OF SUCH AGREEMENT MAY BE OBTAINED UPON WRITTEN
                  REQUEST TO THE SECRETARY OF THE COMPANY."

      3.2 The Investors agree that the Company may instruct its transfer agent
         to impose transfer restrictions on the shares represented by
         certificates bearing the legend referred to in Section 3.1 above to
         enforce the provisions of this Agreement and the Company agrees to
         promptly do so. The legend shall be removed upon termination of this
         Agreement.

4.       MISCELLANEOUS.

      4.1 CONDITIONS TO EXERCISE OF RIGHTS. Exercise of SCP's rights under this
         Agreement shall be subject to and conditioned upon, and the Investors
         and the Company shall use their best efforts to assist SCP in,
         compliance with applicable laws.

      4.2 GOVERNING LAW. The construction, validity and interpretation of this
         Agreement will be governed by the internal laws of the State of
         Delaware without giving effect to any choice of law or conflict of law
         provision or rule (whether of the State of Delaware or any other
         jurisdiction) that would cause the application of the laws of any
         jurisdiction other than the State of Delaware.

      4.3 SUCCESSORS IN INTEREST. The provisions of this Agreement shall be
         binding upon the successors in interest to any of the shares of the
         Investor Stock subject to this Agreement. The Company shall not permit
         the transfer of any shares of Investor Stock on its books or issue a
         new certificate representing any shares of Investor Stock unless and
         until the person to whom such security is to be transferred shall have
         executed a written agreement, substantially in the form of this
         Agreement, pursuant to which such person becomes a party to this
         Agreement and agrees to be bound by all the provisions hereof as if
         such person were an Investor.

      4.4 ASSIGNABILITY. Except as otherwise provided herein, the terms and
         conditions of this Agreement shall inure to the benefit of and be
         binding upon the respective successors and assigns of the parties.

      4.5 NOTICES. All notices and other communications hereunder shall be in
         writing and shall be deemed given if delivered personally or by
         commercial overnight courier (with

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         confirmation of receipt) or sent via facsimile (with confirmation of
         receipt) (i) if to the Company, at USDATA Corporation, 2435 North
         Central Expressway, Richardson, Texas 75080 (fax: (972) 669-9557),
         Attention: General Counsel, (ii) if to an Investor, at the address
         beneath such Investor's name on Schedule A attached hereto, and (iii)
         if to SCP, at Building 300, 435 Devon Park Drive, Wayne, Pennsylvania
         19087, Attention: General Counsel (fax: (610) 293-0601). Notice given
         by facsimile shall be confirmed by appropriate answer back and shall be
         effective upon actual receipt if received during the recipient's normal
         business hours, or at the beginning of the recipient's next business
         day after receipt if not received during the recipient's normal
         business hours. All notices by facsimile shall be confirmed promptly
         after transmission in writing by certified mail or personal delivery.
         Any party may change any address to which notice is to be given to it
         by giving notice as provided above of such change of address.

      4.6 SEVERABILITY. If one or more provisions of this Agreement are held to
         be unenforceable under applicable law, such provision shall be excluded
         from this Agreement and the balance of the Agreement shall be
         interpreted as if such provision were so excluded and shall be
         enforceable in accordance with its terms.

      4.7 TITLES AND SUBTITLES. The titles and subtitles used in this Agreement
         are used for convenience only and are not to be considered in
         construing or interpreting this Agreement.

      4.8 EXPENSES. If any action at law or in equity is necessary to enforce or
         interpret the terms of this Agreement, the prevailing party shall be
         entitled to reasonable attorneys' fees, costs and necessary
         disbursements in addition to any other relief to which such party may
         be entitled.

      4.9 ENTIRE AGREEMENT. This Agreement constitutes the full and entire
         understanding and agreement between the parties with regard to the
         subject matter hereof.

      4.10 COUNTERPARTS. This Agreement may be executed in two (2) or more
         counterparts, each of which shall be deemed an original, but all of
         which together shall constitute one and the same instrument.

                      [THIS SPACE INTENTIONALLY LEFT BLANK]

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The foregoing RIGHT OF FIRST REFUSAL AGREEMENT is hereby executed as of the date
first above written.

                               SAFEGUARD DELAWARE, INC.

                               By:
                                   --------------------------------------------
                               Name:
                                     ------------------------------------------
                               Title:
                                      -----------------------------------------

                               SAFEGUARD 2000 CAPITAL, L.P.

                               By: Safeguard Delaware, Inc.,
                                   its General Partner

                               By:
                                   --------------------------------------------
                               Name:
                                     ------------------------------------------
                               Title:
                                      -----------------------------------------

                               SCP PRIVATE EQUITY PARTNERS II, L.P.

                               By: SCP Private Equity II General Partner, L.P.,
                                   its General Partner

                               By: SCP Private Equity II LLC,
                                   its Manager

                               By:
                                   --------------------------------------------
                               Name:
                                     ------------------------------------------
                               Title:
                                      -----------------------------------------

                               USDATA CORPORATION

                               By:
                                   -------------------------------------------
                                   Robert Merry
                                   Chief Executive Officer

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                                   SCHEDULE A

                                    Investors

Safeguard Delaware, Inc.
c/o Safeguard Scientifics, Inc.
800 The Safeguard Building
435 Devon Park Drive
Wayne, Pennsylvania 19087
Fax: (610) 293-0601
ATTN: Chief Financial Officer

Safeguard 2000 Capital, L.P.,
c/o Safeguard Scientifics, Inc.
800 The Safeguard Building
435 Devon Park Drive
Wayne, Pennsylvania 19087
Fax: (610) 293-0601
ATTN: Chief Financial Officer<PAGE>   1
                                                                     EXHIBIT 4.1

THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER
THE SECURITIES ACT OF 1933, AS AMENDED. SUCH SECURITIES MAY NOT BE SOLD OR
TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN EXEMPTION THEREFROM UNDER
SAID ACT.

                                                             Warrant to Purchase

WE-021                                                            150,000 Shares

                             NTN COMMUNICATIONS INC.

             (Incorporated under the laws of the State of Delaware)

                WARRANT CERTIFICATE FOR THE PURCHASE OF SHARES OF
           THE $.005 PAR VALUE COMMON STOCK OF NTN COMMUNICATIONS INC.

                  EXERCISABLE ONLY AFTER FEBRUARY 28, 2001 AND
                           VOID AFTER JANUARY 2, 2006.

Warrant Price:  $0.75  (Seventy-Five Cents) per share.

         1. THIS IS TO CERTIFY that, for value received, WOLFE AXELROD
WEINBERGER ASSOCIATES LLC (the "Holder"), is entitled to purchase, subject to
the terms and conditions hereinafter set forth, at any time after February 28,
2001 and on or before January 2, 2006 (the "Warrant Period"), up to 150,000
shares of the $.005 par value common stock ("Common Stock") of NTN
Communications Inc. (the "Company"), and to receive certificate(s) for the
Common Stock so purchased. This Warrant shall become vested and exercisable as
to one twenty-fourth (1/24) of the total number of shares on the last day of
each of the twenty-four (24) consecutive months immediately following January 3,
2001, subject to the Holder continuing to provide financial communications,
media and investor relations services pursuant to the letter agreement, dated as
of January 3, 2001, by and between the Holder and NTN Communications, Inc. This
Warrant may be exercised in whole or in part. Such exercise shall be
accomplished by tender to the Company of the purchase price set forth above as
the warrant price (the "Warrant Price"), either in cash or by certified check or
bank cashier's check, payable to the order of the Company, together with
presentation and surrender to the Company of this Warrant with an executed
subscription in substantially the form attached hereto as Exhibit A. Fractional
shares of the Company's Common Stock will not be issued upon the exercise of
this Warrant.

         2. The Company agrees at all times to reserve and hold available out of
the aggregate of its authorized but unissued Common Stock the number of shares
of its Common Stock issuable upon the exercise of this and all other Warrants of
like tenor then outstanding. The Company further covenants and agrees that all
shares of Common Stock that may be delivered upon the exercise of this Warrant
will, upon delivery, be fully paid and nonassessable and free from all taxes,
liens and charges with respect to the purchase thereof hereunder.

<PAGE>   2

         This Warrant and the Common Stock issuable upon the exercise hereof may
not be sold, transferred, pledged or hypothecated unless the Company shall have
been supplied with evidence reasonably satisfactory to it that such transfer is
not in violation of the Securities Act of 1933, as amended (the "Act") or any
applicable state laws. Subject to the satisfaction of the aforesaid condition,
this Warrant shall be transferable by the Holder.

         If this Warrant is transferred, in whole or in part, upon surrender of
this Warrant to the Company, the Company shall deliver to each transferee a
Warrant evidencing the rights of such transferee to purchase the number of
shares of Common Stock that such transferee is entitled to purchase pursuant to
such transfer.

         The Company may place a legend on this Warrant or any replacement
Warrant and on each certificate representing shares issuable upon exercise of
this Warrant as to which the Company has not been supplied evidence that the
transfer of such security would not be in violation of the Act and any
applicable state laws.

         3. This Warrant does not entitle the Holder to any voting rights or
other rights as a stockholder of the Company, nor to any other rights whatsoever
except the rights herein set forth, and no dividend shall be payable or accrue
by reason of this Warrant or the interest represented hereby, or the shares
purchasable hereunder, until or unless, and except to the extent that, this
Warrant is exercised.

         4. This Warrant is exchangeable upon its surrender by the Holder to the
Company for new Warrants of like tenor and date representing in the aggregate
the right to purchase the number of shares purchasable hereunder, each of such
new Warrants to represent the right to purchase such number of shares as may be
designated by the Holder at the time of such surrender.

         The Company shall comply with the reporting requirements of Sections 13
and 15(d) of the Securities Exchange Act of 1934 (the "Exchange Act") for so
long as and to the extent that such requirements apply to the Company.

         5. The Warrant Price and the number of shares purchasable upon the
exercise of this Warrant are subject to adjustment from time to time upon the
occurrence of any of the events specified in this Section 5.

<PAGE>   3

                  (a) In case the Company shall (i) pay a dividend in shares of
Common Stock or make a distribution in shares of Common Stock, (ii) subdivide
its outstanding shares of Common Stock, (iii) combine its outstanding shares of
Common Stock into a smaller number of shares of Common Stock, or (iv) issue by
reclassification of its shares of Common Stock other securities of the Company,
the number of shares of Common Stock purchasable upon exercise of this Warrant
immediately prior thereto shall be adjusted so that the Holder of this Warrant
shall be entitled to receive the kind and number of shares of Common Stock or
other securities of the Company that he would have owned or have been entitled
to receive after the happening of any of the events described above, had such
Warrant been exercised immediately prior to the happening of such event or any
record date with respect thereto. An adjustment made pursuant to this paragraph
(a) shall become effective immediately after the effective date of such event
retroactive to the record date, if any, for such event.

                  (b) Whenever the number of shares of Common Stock purchasable
upon the exercise of this Warrant is adjusted, as herein provided, the Warrant
Price shall be adjusted by multiplying such Warrant Price immediately prior to
such adjustment by a fraction, of which the numerator shall be the number of
shares of Common Stock purchasable upon the exercise of this Warrant immediately
prior to such adjustment, and of which the denominator shall be the number of
shares of Common Stock so purchasable immediately thereafter.

                  (c) For the purpose of this Section 5, the term shares of
Common Stock shall mean (i) the class of stock designated as the Common Stock of
the Company at the date of this Warrant, or (ii) any other class of stock
resulting from successive changes or reclassifications of such shares consisting
solely of change in par value, or from par value to no par value, or from no par
value to par value.

                  (d) If during the Warrant Period the Company consolidates with
or merges into another corporation or transfers all or substantially all of its
assets, the Holder shall thereafter be entitled upon exercise hereof to
purchase, with respect to each share of Common Stock purchasable hereunder
immediately prior to the date upon which such consolidation or merger becomes
effective, the securities or property to which a holder of shares of Common
Stock is entitled upon such consolidation or merger, without any change in, or
payment in addition to the Warrant Price in effect immediately prior to such
merger or consolidation, and the Company shall take such steps in connection
with such consolidation or merger as may be necessary to ensure that all of the
provisions of this Warrant shall thereafter be applicable, as nearly as
reasonably may be, in relation to any securities or property thereafter
deliverable upon the exercise of this Warrant. The Company shall not effect any
such consolidation, merger or asset transfer unless prior to the consummation
thereof the successor corporation resulting therefrom shall assume by written
agreement executed and mailed to the registered Holder at his address shown on
the books and records of the Company, the obligation to deliver to such Holder
any such securities or property as in accordance with the foregoing provisions
such Holder shall be entitled to purchase.

<PAGE>   4

                  (e) Upon the happening of any event requiring an adjustment of
the Warrant Price, the Company shall forthwith give written notice thereof to
the registered Holder of this Warrant, stating the adjusted Warrant Price and
the adjusted number of shares of Common Stock or other securities or property
purchasable upon the exercise hereof resulting from such event and setting forth
in reasonable detail the method of calculation and the facts upon which such
calculation is based. The Board of Directors of the Company shall determine the
adjusted Warrant Price and the securities or property purchasable upon exercise.
If any voluntary or involuntary dissolution, liquidation, or winding up of the
Company is proposed, the Company shall give at least 20 days prior written
notice of such proposal to the registered Holder hereof stating the date on
which such event is to take place and the date (which shall be at least 20 days
after giving of such notice) as of which the holders of shares of Common Stock
of record shall be entitled to exchange their Common Stock for securities or
other property deliverable upon such dissolution, liquidation or winding up.
This Warrant and all rights hereunder shall terminate as of the date on which
such dissolution, liquidation, or winding up takes place. The notices pursuant
to this paragraph shall be given by first class mail, postage prepaid, addressed
to the registered Holder of this Warrant at his address appearing in the records
of the Company.

                  (f) Irrespective of any adjustments pursuant to this Section 4
to the Warrant Price or to the number of shares or other securities or other
property obtainable upon exercise of this Warrant, this Warrant may continue to
state the Warrant Price and the number of shares obtainable upon exercise, as
the same price and number of shares stated herein.

         6. Notwithstanding anything to the contrary herein the Exercise Dates
shall automatically be accelerated immediately upon a Change in Control Event. A
"Change in Control Event" shall mean:

         (1) The acquisition by any individual entity or group (within the
meaning of Section 13(d)(3) or 14(d)(2) of the Exchange Act (a "Person")) of
beneficial ownership of 50% or more of the then outstanding voting securities of
the Corporation entitled to vote generally in the election of directors (the
"Outstanding Voting Securities"); provided, however, that the following
acquisitions shall not constitute a Change in Control Event: (A) any acquisition
by the Corporation or (B) any acquisition by any employee benefit plan (or
related trust) sponsored or maintained by the Corporation or any corporation
controlled by the Corporation; or

         (2) Individuals who, as of the date hereof, constitute the Board (the
"Incumbent Board") cease for any reason to constitute at least a majority of the
Board; provided, however, that any individual who becomes a director subsequent
to the date hereof whose election, or nomination for election by the
Corporation's shareholders, was approved by a vote of at least a majority of the
directors then comprising the Incumbent Board shall be considered as though such
individual were a member of the Incumbent Board; but excluding, for this
purpose, any such individual whose initial assumption of office occurs as a
result of either an actual or threatened election contest (as such terms are
used in Rule 14a-11 of Regulation 14A promulgated under the Exchange Act) or
other actual or threatened solicitation of proxies or consents by or on behalf
of a Person other than the Board; or

<PAGE>   5
         (3) Approval by the shareholders of the Corporation of a
reorganization, merger or consolidation (a "transaction"), unless, following
such transaction in each case, more than 50% of, respectively, the then
outstanding shares of common stock of the corporation resulting from such
transaction and the combined voting power of the then outstanding voting
securities of such corporation entitled to vote generally in the election of
directors is then beneficially owned, directly or indirectly, by all or
substantially all of the individuals or entities who were the beneficial owners,
respectively, of the outstanding Common Stock and Outstanding Voting Securities
immediately prior to such transaction; or

         (4) Approval by the shareholders of the Corporation of (A) a complete
liquidation or dissolution of the Corporation or (B) the sale or other
disposition of all or substantially all of the assets of the Corporation, unless
such assets are sold to a corporation and following such sale or other
disposition, the condition described in paragraph (3) above is satisfied.

         IN WITNESS WHEREOF, the Company has caused this Warrant to be executed
by its duly authorized officers, and the corporate seal hereunto affixed.

DATED: February 2, 2001                       NTN COMMUNICATIONS, INC.

                                              By: /s/ Stanley B. Kinsey
                                                  ------------------------------
                                                  Stanley B. Kinsey
                                                  Chief Executive Officer

                                              By: /s/ Kendra Berger
                                                  ------------------------------
                                                  Kendra Berger
                                                  Secretary

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