DATAMETRICS CORP
8-K, 1998-08-07
COMPUTER PERIPHERAL EQUIPMENT, NEC
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================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                   
                               -------------------
                                    FORM 8-K
                               -------------------

                                 CURRENT REPORT

                       Pursuant to Section 13 or 15(d) of
                       the Securities Exchange Act of 1934


                                  JULY 24, 1998
           -----------------------------------------------------------
                Date of Report (Date of earliest event reported)


                             DATAMETRICS CORPORATION
           -----------------------------------------------------------
             (Exact name of registrant as specified in its charter)


                                    DELAWARE
           -----------------------------------------------------------
                 (State or other jurisdiction of incorporation)


        0-8567                                                 95-3545701
- ------------------------                                  --------------------
(Commission File Number)                                    (I.R.S. Employer
                                                           Identification No.)


   25B HANOVER ROAD, FLORHAM PARK, NJ                            07932
- ----------------------------------------                      ------------
(Address of principal executive offices)                       (Zip Code)


                                 (973) 377-3900
           -----------------------------------------------------------
               Registrant's telephone number, including area code


          -------------------------------------------------------------
          (Former name or former address, if changed since last report)


================================================================================

<PAGE>

ITEM 5
- ------
         On  July  24,  1998  (the  "Closing  Date"),   several  investors  (the
"Investors")   purchased   $1,000,000  in  aggregate   principal  amount  of  7%
Convertible  Debentures  due July 24,  2001 (the  "Debentures")  of  Datametrics
Corporation (the  "Registrant")  pursuant to a certain 7% Convertible  Debenture
Subscription Agreement dated as of July 24, 1998 (the "Agreement").
The aggregate cash consideration paid was $1,000,000.

         Fifty  percent  of  the  original  aggregate  principal  amount  of the
Debentures  are  convertible  at the  Investors'  election into shares of common
stock,  $.01 par value per share ("Common  Stock") of the Registrant at any time
after  January 23, 1999,  and the remainder at any time after March 14, 1999, at
the lesser of (i) $2.125  per share of Common  Stock or (ii) 80% of the  average
closing  bid  prices of the Common  Stock for the  preceding  10  trading  days,
provided that in the case of a conversion  referred to in (ii),  the  Registrant
has the  option  at its  election  to  redeem  the  Debentures  for  120% of the
principal  amount of  Debentures  thereof.  The  Registrant  may also redeem the
Debentures  if the closing bid price of the Common  Stock is greater  than $4.25
for 20 consecutive trading days.

         The principal amount of the Debentures bears interest at the rate of 7%
per annum and matures on July 24,  2001,  at which time the  Debentures  convert
automatically  into Common Stock.  The Debentures are  subordinate and junior to
the  prior  payment  in full  of all  indebtedness  for  borrowed  money  of the
Registrant.  Imperial Bank, the Registrant's senior lender, has consented to the
sale of Debentures.

         The Agreement contains certain covenants and restrictions and a related
Registration  Rights Agreement grants the Investors certain  registration rights
with respect to the shares of Common Stock which may be acquired upon conversion
of the Debentures.

         The above  discussion  is qualified in its entirety by reference to the
Agreement, the Debentures and the Registration Rights Agreement,  copies of each
of which  are  attached  hereto  as  Exhibits  and  incorporated  herein by this
reference.


ITEM 7
- ------
         (c)      EXHIBITS


         Exhibits which, in their entirety, are incorporated by reference to any
report, exhibit or other filing previously made with the Securities and Exchange
Commission  are  designated by an asterisk (*) and the location of such material
is included in its description.


<PAGE>

<TABLE>
<CAPTION>

EXHIBIT NO.           DESCRIPTION                                                                    PAGE NO.     
- -----------           -----------                                                                    --------     
                                                                                                     
<S>                  <C>                                                                       <C>                                 
   3.1                Restated  Certificate of Incorporation  of Registrant,  as                                  
                      currently in effect.                                                               *        
                                                                                                                  
   3.2                Certificate  of  Designations,  Preferences  and Relative,                                  
                      Participating, Optional and Other Special Rights of Series                         *        
                      B  Preferred  Stock and  Qualifications,  Limitations  and                                  
                      Restrictions  thereof dated August 10, 1993  (incorporated                                  
                      by reference to Exhibit 4.1 to Registrant's Form 8-K dated                                  
                      August 10, 1993).                                                                           
                                                                                                                  
   3.3                Bylaws of Registrant, as currently in effect (incorporated                                  
                      by reference to Exhibit 3.2 to Registrant's  Form 10-K for                         *        
                      the year ended October 28, 1990).                                                           
                                                                                                                  
   3.4                First Amendment to the Restated By-Laws of the Registrant,                                  
                      dated August 6, 1996 (incorporated by reference to Exhibit                         *        
                      3.0 to the Registrant's Form 8-K dated August 6, 1996).                                     
                                                                                                                  
   4.1                7%  Convertible  Debenture  Subscription  Agreement  dated                                  
                      Filed  Herewith as of July 24, 1998 between the Registrant                                  
                      and the Investors named therein.                                              Filed Herewith
                                                                                                                  
   4.2                Form of 7% Convertible Debenture.                                                           
                                                                                                                  
   4.3                Registration  Rights  Agreement  dated as of July 24, 1998                    Filed Herewith
                      Filed  Herewith  between the  Registrant and the Investors                                  
                      named therein.                                                                Filed Herewith
                                                                                                    
   10.1               Line of Credit Agreement,  Security Agreement, Addendum to                         *
                      Line  of   Credit   Agreement,   and   Loan   Disbursement
                      Instructions  dated  September  8, 1993  (incorporated  by
                      reference  to Exhibit 10.1 to  Registrant's  Form 10-K for
                      the year ended October 31, 1993).

   10.3               Lease for Woodland Hills facility  between the Company and                         *
                      Manufacturers  Life Insurance Company dated as of December
                      19, 1993, as amended on August 31, 1994  (incorporated  by
                      reference  to Exhibit 10.2 to  Registrant's  Form 10-K for
                      the year ended October 30, 1994).

   10.4               Agreement  between  the  Company  and Sidney E. Wing dated                         *
                      March 17, 1989  (incorporated by reference to Exhibit 10.4
                      to Registrant's Form 10-K for the year ended October 29,
                      1989).

</TABLE>

<PAGE>


<TABLE>
<CAPTION>

EXHIBIT NO.           DESCRIPTION                                                                    PAGE NO.     
- -----------           -----------                                                                    --------     
                      
<S>                  <C>                                                                       <C>

   10.5               Deferred  Compensation  Agreement  between the Company and                         *
                      Garland S. White dated October 18, 1989  (incorporated  by
                      reference  to Exhibit 10.5 to  Registrant's  Form 10-K for
                      the year ended October 29, 1989).

   10.6               Amended and Restated Agreement and Plan of Merger dated as                         *
                      of May 12,  1993  between  Registrant  and Rugged  Digital
                      Systems,   Inc.   ("Rugged   Digital")   (incorporated  by
                      reference to Exhibit 2 to Registrant's  Form 8-K dated May
                      12, 1993).

   10.7               Escrow   Agreement   dated   August  10,  1993  among  the                         *
                      Registrant  and  others  relating  to the  acquisition  of
                      Rugged Digital  (incorporated  by reference to Exhibit 4.3
                      to Registrant's Form 8-K dated August 10, 1993).

   10.8               Debt  Exchange  Agreement  dated  August  10,  1993  among                         *
                      Registrant    and   debt   holders   of   Rugged   Digital
                      (incorporated  by reference to Exhibit 4.2 to Registrant's
                      Form 8-K dated August 10, 1993).

   10.9               Security  and  Loan  Agreement   between   Registrant  and                         *
                      Imperial Bank executed  March 21, 1995, as amended May 15,
                      1995   (incorporated  by  reference  to  Exhibit  10.1  to
                      Registrant's  Form  10-Q for the  period  ended  April 30,
                      1995),  and as  amended  March 4,  1996  (incorporated  by
                      reference  to period  ended April 30, 1995) and as amended
                      March 4, 1966  (incorporated  by reference to Exhibit 10.1
                      to  Registrant's  Form 10-Q for the period ended April 28,
                      1996).

   10.10              Agreement  between the Company  and the  Angeloff  Company                         *
                      dated  February  15, 1995  (incorporated  by  reference to
                      Exhibit  10.2 to  Registrant's  Form  10-Q for the  period
                      ended April 30, 1995).

    21                List of Subsidiaries                                                               *

   24.1               Consent of Ernst & Young LLP, Independent Auditors.                                *

   24.2               Consent of Deloitte and Touche LLP, Independent Auditors.                          *

    27                Financial Data Schedule.                                                           *

</TABLE>

<PAGE>

<TABLE>
<CAPTION>

EXHIBIT NO.           DESCRIPTION                                                                    PAGE NO.     
- -----------           -----------                                                                    --------     
                      
<S>                  <C>                                                                       <C>

   99.1               The  Datametrics  Employee  Savings  Plan  And  The  Trust                         *
                      Agreement  Pursuant To The  Datametrics  Employee  Savings
                      Plan   (incorporated   by   reference  to  Exhibit  28  to
                      Registrant's  Statement  on Form S-8 filed on November 12,
                      1985 SEC File No. 33-01469.

   99.2               The  Amended  and  Restated  1993  Stock  Option  Plan  of                         *
                      Datametrics  Corporation  (incorporated  by  reference  to
                      Exhibit 28.2 to Registrant's  Form 10-K for the year ended
                      October 31, 1993).

   99.3               The 1986 Stock Option Plan of Datametrics Corporation,  as                         *
                      amended  (incorporated  by  reference  to Exhibit  28.1 to
                      Registrant's  Registration  Statement on Form S-8 filed on
                      June 10, 1987,  SEC File No.  33-14969 and Exhibit 28.5 to
                      Registrant's  Form  10-K for the year  ended  October  29,
                      1988).

   99.4               The 1982 Stock Option Plan of Datametrics Corporation,  as                         *
                      amended  (incorporated  by  reference  to Exhibit  28.2 to
                      Registrant's  Registration  Statement on Form S-8 filed on
                      June 10, 1987, SEC File No. 33-14969).

   99.5               The 1993 Directors' Option Plan of Datametrics Corporation                         *
                      (incorporated by reference to Exhibit 28.5 to Registrant's
                      Form 10-K for the year ended October 31, 1993).

   99.6               Datametrics Corporation  Supplemental Executive Retirement                         *
                      Plan and Master Trust Agreement (incorporated by reference
                      to  Exhibit  28.6 to  Registrant's  From 10-K for the year
                      ended October 30, 1994).

   99.7               The 1995  Stock  Option  Plan of  Datametrics  Corporation                         *
                      (incorporated by reference to Exhibit 28.7 to Registrant's
                      Form S-8 Filed May 30, 1996, SEC File No. 333-04815).

   99.8               The  Datametrics   Corporation  Employee  Qualified  Stock                         *
                      Purchase Plan  (incorporated  by reference to Exhibit 28.8
                      to  Registrant's  Form S-8 filed on May 30, 1996, SEC File
                      No. 333-04815).
       
</TABLE>

<PAGE>

                                   SIGNATURES


        Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.


                                       DATAMETRICS CORPORATION



                                       By:  /s/ Ronald Lefkon
                                            ----------------------------------
                                            Ronald Lefkon, Vice President and
                                            Chief Financial Officer


Dated July 24, 1998




                                                                     EXHIBIT 4.1
                                                                     -----------

THESE SECURITIES HAVE NOT BEEN REGISTERED WITH THE UNITED STATES  SECURITIES AND
EXCHANGE COMMISSION (THE "COMMISSION") OR THE SECURITIES COMMISSION OF ANY STATE
PURSUANT TO AN EXEMPTION FROM REGISTRATION  UNDER THE SECURITIES ACT OF 1933, AS
AMENDED (THE "ACT"),  AND APPLICABLE STATE  SECURITIES  LAWS. THIS  SUBSCRIPTION
AGREEMENT  SHALL NOT CONSTITUTE AN OFFER TO SELL NOR A SOLICITATION  OF AN OFFER
TO BUY THE SECURITIES IN ANY  JURISDICTION  IN WHICH SUCH OFFER OR  SOLICITATION
WOULD BE UNLAWFUL.  THE  SECURITIES  MAY NOT BE SOLD,  PLEDGED,  TRANSFERRED  OR
ASSIGNED  EXCEPT  PURSUANT  TO AN  EFFECTIVE  REGISTRATION  STATEMENT  UNDER THE
SECURITIES ACT AND UNDER  APPLICABLE  STATE SECURITIES LAWS, OR IN A TRANSACTION
WHICH IS EXEMPT FROM REGISTRATION UNDER THE PROVISIONS OF THE SECURITIES ACT AND
UNDER PROVISIONS OF APPLICABLE STATE SECURITIES LAWS.


                            7% CONVERTIBLE DEBENTURE
                             SUBSCRIPTION AGREEMENT
                             ----------------------

                             DATAMETRICS CORPORATION



         THIS 7% CONVERTIBLE DEBENTURE SUBSCRIPTION AGREEMENT  (this"Agreement")
is executed in reliance  upon an  exemption  under the  Securities  and Exchange
Commission ("SEC"), under the Securities Act of 1933, as amended (the "Act").

         This Agreement has been executed by the  undersigned in connection with
the private placement of the 7% Convertible Debentures  (hereinafter referred to
as the "Debentures") of DATAMETRICS  CORPORATION (American Stock Exchange symbol
"DC"), with an address at 25B Hanover Road, No. 3305,  Florham Park, NJ 07932, a
corporation organized under the laws of the State of Delaware,  USA (hereinafter
referred  to as the  "Company").  The  terms  on  which  the  Debentures  may be
converted  into common  stock of the  Company,  $0.01 par value per share,  (the
"Common  Stock") and the other terms of the Debentures are set forth in the form
of the 7%  Convertible  Debenture due July 24, 2001 annexed  hereto as Exhibit A
(the "Form of Debenture").  The offer and sale of the Debentures, and the Common
Stock underlying the Debentures (collectively the "Securities"),  are being made
in  reliance  upon an  exemption  under  the  Act.  The  Closing  Date  shall be
determined in accordance with Sections 13, 14 and 15 herein.

         Each  of  the  entities  listed  on  Schedule  A  annexed  hereto  (the
"Subscribers") hereby represents and warrants to, and agrees with the Company as
follows:

         SECTION 1.  AGREEMENT TO SUBSCRIBE; PURCHASE PRICE.
                     ---------------------------------------

                                       -1-

<PAGE>

         1.1  CLOSING.  The Company will sell and the  Subscribers  will buy, in
reliance upon the  representations and warranties of the Company and Subscribers
contained  in this  Agreement  and the Form of  Debenture,  upon the  terms  and
conditions set forth herein and therein, that principal amount of Debentures set
forth next to their names on Schedule A for an aggregate  purchase  price of One
Million  ($1,000,000) U.S. Dollars (the "Purchase  Price").  The proceeds of the
sale of the Debentures  will be used only for working  capital  purposes and not
for the payment of any senior or secured debt.

         1.2  FORM OF PAYMENT.  The Subscribers  shall pay the Purchase Price by
delivering  good funds in United  States  Dollars by wire  transfer in escrow to
Goldstein,  Goldstein & Reis,  LLP, the Escrow  Agent,  against  delivery of the
original  Debentures to the Escrow Agent,  as per a separate  Escrow  Agreement,
annexed  hereto  as  Exhibit  B) as  payment  in full for their  portion  of the
Securities.

         1.3  WIRE  INSTRUCTIONS.  Wire instructions for Goldstein,  Goldstein &
Reis, LLP are as follows:

                  Chase Manhattan Bank, N.A.
                  ABA No. 021000021
                  For the Account of:
                      United States Trust Company of New York
                      Account No. 920-1-073195
                  In favor of:
                      Goldstein, Goldstein & Reis, LLP Attorney Escrow Account
                      Account No. 59-01383

         SECTION  2.   REPRESENTATIONS   AND  WARRANTIES  OF  THE   SUBSCRIBERS.
Subscribers each acknowledge, represent, warrant and agree as follows:

         2.1  ORGANIZATION  AND  AUTHORIZATION.  Each of the Subscribers is duly
incorporated  or organized  and validly  existing in the state or country of its
incorporation  or  organization  and has all  requisite  power and  authority to
subscribe  for and  purchase  and hold the  Securities  and to enter  into  this
Agreement.  The decision to  subscribe  for  Debentures  and the  execution  and
delivery  of  this  Agreement  by  the  Subscribers,   the  performance  by  the
Subscribers  of  their  obligations   hereunder  and  the  consummation  by  the
Subscribers of the  transactions  contemplated  hereby have been duly authorized
and  requires  no  other  proceedings  on  the  part  of  the  Subscribers.  The
undersigned  signatories  have all right,  power and  authority  to execute  and
deliver this  Agreement on behalf of the  Subscribers.  This  Agreement has been
duly executed and delivered by the Subscribers  and,  assuming the execution and
delivery  hereof and acceptance  hereof by the Company,  constitutes  the legal,
valid and  binding  obligations  of the  Subscribers,  enforceable  against  the
Subscribers in accordance with its terms.

         2.2  EVALUATION  OF RISKS.  Each of the  Subscribers has such knowledge
and experience in financial and business  matters as to be capable of evaluating
the merits and risks of, and bearing the

                                       -2-

<PAGE>

economic  risks  entailed by, an investment in the Company and of protecting its
interests in connection  with this  transaction.  They each recognize that their
investment in the Company involves a high degree of risk and could result in the
complete loss of their investment.

         2.3  INDEPENDENT COUNSEL. Each of the Subscribers acknowledge that they
have been  advised to consult with their own attorney  regarding  legal  matters
concerning  the Company and their  investment in the  Securities  and to consult
with  their  tax  advisor  regarding  the  tax  consequences  of  acquiring  the
Securities.

         2.4  DISCLOSURE  DOCUMENTATION.   Each  of  the  Subscribers  has  each
received  and  reviewed  copies  of  the  Company's   reports  and  registration
statements  filed under the  Securities  Exchange  Act of 1934,  as amended (the
"1934 Act"),  and the Act,  including the Company's  10-Ks,  10-Qs,  8-K's,  and
registration  statements filed by the Company since June 1, 1997  (collectively,
the "Reports").  Except for the Reports,  the Subscribers are not relying on any
other information relating to the offer and sale of the Securities.  Subscribers
acknowledge that the Company has offered to make available any additional public
information  that the Subscribers may reasonably  request,  including  technical
information,  and  other  material  public  information  about the  Company  and
Subscribers have been offered the Company's full and  unconditional  cooperation
in making such  information  available to Subscribers and  acknowledge  that the
Company has recommended that the Subscribers request and review such information
prior to making an investment  decision.  Except as set forth in herein, no oral
or  written  representations  have been  made,  or oral or  written  information
furnished to the  undersigned,  the  Subscribers or their  advisors,  if any, in
connection  with the  offering  of the  Securities  which were or are in any way
inconsistent with the Reports.

         2.5  OPPORTUNITY TO ASK QUESTIONS.  Each of the  Subscribers  has had a
reasonable  opportunity to ask questions of and receive answers from the Company
concerning  the  Company  and the  offering  of the  Securities,  and  all  such
questions,  if any, have been answered to the full  satisfaction  of each of the
Subscribers.

         2.6  REPORTS  CONSTITUTE SOLE  REPRESENTATIONS.  Except as set forth in
the Reports and elsewhere  herein,  no  representations  or warranties have been
made to  Subscribers  by (a) the Company or any agent,  employee or affiliate of
the  Company or (b) any other  person,  and in  entering  into this  transaction
Subscribers are not relying upon any  information,  other than that contained in
the Reports and the results of independent investigation by Subscribers.

         2.7  EACH OF THE  SUBSCRIBERS  IS AN  ACCREDITED  INVESTOR.  All of the
Subscribers  are  "Accredited  Investors",  as defined  under  Regulation D, and
represent and warrant that they are included within one or more of the following
categories of "Accredited Investors."

         (i)      Any bank as  defined in  Section  3(a)(2)  of the Act,  or any
                  savings and loan associated or other institution as defined in
                  Section  3(a)(5)A of the Act whether  acting in its individual
                  or  fiduciary  capacity;   any  broker  or  dealer  registered
                  pursuant to Section 15 of the 1934 Act; any insurance  company
                  as defined in Section 2(13) of the Act;

                                       -3-

<PAGE>

                  any investment company registered under the Investment Company
                  Act of 1940 or a  business  development  company as defined in
                  Section  2(a)(48) of that Act; any Small  Business  Investment
                  Company  licensed by the U.S.  Small  Business  Administration
                  under Section 301(c) or (d) of the Small Business Act of 1958;
                  any plan  established and maintained by a state, its political
                  subdivisions,  or any agency or  instrumentality of a state or
                  its political  subdivision,  for the benefits of its employees
                  if such plan has total  assets  in excess of  $5,000,000;  and
                  employee  benefit  plan  within the  meaning of Title I of the
                  Employee  Retirement  Income  Security  Act  of  1974  if  the
                  investment decision is made by a plan fiduciary, as defined in
                  Section 3(21) of such Act, which is either a bank, savings and
                  loan association,  insurance company, or registered investment
                  advisor,  or if the employee  benefit plan has total assets in
                  excess of $5,000,000;

         (ii)     Any private business development company as defined in Section
                  202(a)(22) of the Investment Advisers Act of 1940;

         (iii)    Any  organization   described  in  Section  501(c)(3)  of  the
                  Internal Revenue Code,  corporation,  Massachusetts or similar
                  business trust,  or  partnership,  not formed for the specific
                  purpose of acquiring the securities offered, with total assets
                  in excess of $5,000,000;

         (iv)     Any director,  executive  officer,  or general  partner of the
                  Company,  or  any  director,  executive  officer,  or  general
                  partner of a general partner of that issuer;

         (v)      Any natural person whose  individual  net worth,  or joint net
                  worth with that person's  spouse,  at the time of his purchase
                  exceeds $1,000,000;

         (vi)     Any natural  person who had an individual  income in excess of
                  $200,000  in each of the two (2)  most  recent  years or joint
                  income with that person's spouse in excess of $300,000 in each
                  of those years and has a  reasonable  expectation  of reaching
                  that same income level in the current year;

         (vii)    Any trust,  with  total  assets in excess of  $5,000,000,  not
                  formed for the specific  purpose of acquiring  the  securities
                  offered,  whose purchase is directed by a sophisticated person
                  as  described  in Section  230.506(b)(2)(ii)  of  Regulation D
                  under the Act;

         (viii)   Any  entity in which all of the equity  owners are  accredited
                  investors; and

         (ix)     Any  self-directed   employee  benefit  plan  with  investment
                  decisions made solely by persons that are accredited investors
                  within the  meaning of Rule 501 of  Regulation  D  promulgated
                  under the Act.


                                       -4-

<PAGE>

         2.8  NO  REGISTRATION,  REVIEW  OR  APPROVAL.  Each of the  Subscribers
acknowledges  and  understands  that the limited  private  offering  and sale of
Securities  pursuant to this  Agreement has not been reviewed or approved by the
SEC or by any state  securities  commission,  authority  or  agency,  and is not
registered  under the Act or under the  securities or "blue sky" laws,  rules or
regulations of any state. Each of the Subscribers acknowledges,  understands and
agrees that the Securities are being offered and sold hereunder  pursuant to (i)
a private placement exemption to the registration provisions of the Act pursuant
to Section 3(b) or Section 4(2) of such Act, and (ii) a similar exemption to the
registration  provisions  of  applicable  state  securities  laws.  Each  of the
Subscribers  understands that the Company is relying upon the truth and accuracy
of   the   representations,    warranties,   agreements,   acknowledgments   and
understandings  of the  Subscribers  set forth herein in order to determine  the
applicability  of such  exemptions  and the  suitability  of the  Subscribers to
acquire the Securities.

         2.9  INVESTMENT  INTENT.  Without  limiting their ability to resell the
Securities pursuant to an effective  registration  statement under the Act, each
of the  Subscribers is acquiring the  Securities  solely for its own account and
not with a view to the distribution, assignment or resale to others. Each of the
Subscribers understands and agrees that it may have to bear the economic risk of
its investment in the Securities for an indefinite period of time.

         2.10  NO  ADVERTISEMENTS.  The  Subscribers are not subscribing for the
Securities as a result of or subsequent to any advertisement, article, notice or
other communication  published in any newspaper,  magazine,  or similar media or
broadcast over television or radio, or presented at any seminar or meeting.

         2.11  REGISTRATION RIGHTS. The parties have entered into a Registration
Rights Agreement (Exhibit C).

         SECTION 3.  REPRESENTATIONS AND WARRANTIES OF THE COMPANY.  The Company
acknowledges, represents, warrants and agrees as follows:

         3.1  ORGANIZATION/QUALIFICATION.  The  Company  is a  corporation  duly
organized and validly existing under the laws of the State of Delaware and is in
good standing under such laws. The Company has all requisite corporate power and
authority to own, lease and operate its  properties and assets,  and to carry on
its business as presently conducted.  The Company is qualified to do business as
a  foreign  corporation  in each  jurisdiction  in which  the  ownership  of its
property or the nature of its business requires such qualification, except where
its failure to be so qualified  would not have a material  adverse effect on the
Company.

         3.2  ACCURACY OF REPORTS AND INFORMATION. Except as otherwise disclosed
herein or in any schedule  hereto,  the Company is in compliance,  to the extent
applicable,  with all reporting obligations under either Section 12(b), 12(g) or
15(d) of the 1934 Act, and shall  maintain  such status on a timely  basis.  The
Company has  registered  its Common Stock pursuant to Section 12 of the 1934 Act
and the Common Stock is listed and trades on the American Stock Exchange. [The

                                       -5-

<PAGE>

Company has filed all material  required to be filed  pursuant to all  reporting
obligations,  under  either  Section  13(a) or 15(d) of the 1934 Act  during the
twelve (12) months  immediately  preceding the offer and sale of the  Securities
(or for such  shorter  period that the  Company  has been  required to file such
material).]

         3.3  SEC  FILINGS/FULL  DISCLOSURE.  None of the Company's filings with
the  Securities  and  Exchange  Commission  contain  any untrue  statement  of a
material fact or omit to state any material  fact required to be stated  therein
or necessary to make the statements therein in light of the circumstances  under
which they were made, not misleading. The Company has timely filed all requisite
forms, reports and exhibits thereto with the Securities and Exchange Commission.
There is no fact known to the Company  (other than general  economic  conditions
known to the  public  generally)  that has not been  publicly  disclosed  by the
Company  or  disclosed  in writing  to each of the  Subscribers  which (i) could
reasonably  be  expected  to have a  material  adverse  effect on the  condition
(financial or otherwise) or on the earnings,  business affairs,  properties,  or
assets of the Company (a "Material Adverse Effect"), or (ii) could reasonably be
expected  to  materially  and  adversely  affect the  ability of the  Company to
perform its obligations pursuant to this Agreement.

         3.4  AUTHORIZATION.  The Company  has all  requisite  corporate  right,
power and authority to execute and deliver this  Agreement and to consummate the
transactions  contemplated  hereby.  All  corporate  action  on the  part of the
Company,  its  directors  and  stockholders  necessary  for  the  authorization,
execution,  delivery and  performance  of this  Agreement  by the  Company,  the
authorization, sale, issuance and delivery of the Securities and the performance
of the Company's  obligations  hereunder has been taken. This Agreement has been
duly  executed and delivered by the Company and  constitutes a legal,  valid and
binding  obligation of the Company  enforceable  in  accordance  with its terms,
subject to laws of general  application  relating to bankruptcy,  insolvency and
the  relief  of  debtors  and  rules  of  law  governing  specific  performance,
injunctive  relief or other  equitable  remedies,  and to  limitations of public
policy as they may  apply to the  indemnification  provisions  set forth in this
Agreement.  Upon their issuance and delivery in accordance  with this Agreement,
the Securities will be validly issued,  fully paid and nonassessable and will be
free of any liens or encumbrances;  provided,  however,  that the Securities are
subject to restrictions on transfer under state and/or federal  securities laws.
The issuance  and sale of the  Securities  will not give rise to any  preemptive
right or right of first  refusal  or right of  participation  on  behalf  of any
person.

         3.5  NO CONFLICT.  The execution and delivery of this Agreement do not,
and the consummation of the transactions  contemplated hereby will not result in
any  violation  of,  or  default,  or  give  rise  to a  right  of  termination,
cancellation  or  acceleration  of any  material  obligation  or to a loss  of a
material benefit, under, any provision of the Certificate of Incorporation,  and
any amendments thereto, Bylaws, and any amendments thereto of the Company or any
material mortgage,  indenture,  lease or other agreement or instrument,  permit,
concession,   franchise,   license,   judgment,  order,  decree,  statute,  law,
ordinance,  rule or  regulation  applicable  to the Company,  its  properties or
assets and which (i) would  reasonably  be expected  to have a Material  Adverse
Effect,  or (ii) could reasonably be expected to materially and adversely affect
the  ability  of the  Company  to  perform  its  obligations  pursuant  to  this
Agreement.

                                       -6-

<PAGE>

         3.6  NO  UNDISCLOSED   LIABILITIES  OR  EVENTS.   The  Company  has  no
liabilities  or  obligations,  other than those  disclosed in the Reports,  this
Agreement or those  incurred in the ordinary  course of the  Company's  business
since  June  15,  1998,  which  individually  or in  the  aggregate,  would  (i)
reasonably be expected to have a Material Adverse Effect,  or (ii) reasonably be
expected  to  materially  and  adversely  affect the  ability of the  Company to
perform its obligations pursuant to this Agreement. Except as set for in Section
3.24, to the knowledge of the Company,  no event or circumstance has occurred or
exists with  respect to the Company  which (i) could  reasonably  be expected to
have a  Material  Adverse  Effect,  or (ii)  could  reasonably  be  expected  to
materially  and  adversely  affect  the  ability of the  Company to perform  its
obligations pursuant to this Agreement.

         3.7  NO  DEFAULT.  Except as set forth in Section 3.24,  the Company is
not in default in the  performance  or  observance  of any material  obligation,
agreement,  covenant or condition contained in any indenture,  mortgage, deed of
trust or other  material  instrument  or  agreement to which it is a party or by
which it is or its  property  is  bound,  and  neither  the  execution,  nor the
delivery by the Company,  nor the  performance by the Company of its obligations
under this Agreement or the Exhibits  annexed  hereto,  including the conversion
provision of the Debentures will result in the breach or violation of any of the
terms or  provisions  of, or  constitute  a default or result in the creation or
imposition  of any lien or charge on any  assets or  properties  of the  Company
under,  any  material  indenture,  mortgage,  deed of trust  or other  agreement
applicable  to the Company or  instrument  to which the Company is a party or by
which it is bound or any statute or the Certificate of  Incorporation or by-laws
of the Company, or any decree, judgment,  order, rule or regulation of any court
or  governmental  agency or body  having  jurisdiction  over the  Company or its
properties,  or the Company's  listing  agreement for its Common Stock (it being
understood  that it will be  necessary  for the  Company  to file an  additional
listing  application  with the American  Stock Exchange to list the Common Stock
issuable pursuant to the Debenture),  which individually or in the aggregate (i)
could  reasonably be expected to have a Material  Adverse Effect,  or (ii) could
reasonably  be expected to materially  and  adversely  affect the ability of the
Company to perform its obligations pursuant to this Agreement.

         3.8  ABSENCE OF EVENTS OF  DEFAULT.  Except as set forth in the Reports
and this  Agreement  (including all Exhibits  annexed  hereto),  no default,  as
defined in the  respective  agreement  to which the  Company is a party,  and no
event  which,  with the giving of notice or the  passage of time or both,  would
become a default, has occurred and is continuing,  which would (i) reasonably be
expected to have a Material Adverse Effect, or (ii) could reasonable be expected
to  materially  and  adversely  affect the ability of the Company to perform its
obligations pursuant to this Agreement.

         3.9  GOVERNMENTAL  CONSENT, ETC. No consent,  approval or authorization
of or designation,  declaration or filing with any governmental authority on the
part of the Company is  required  in  connection  with the valid  execution  and
delivery of this  Agreement  (including  all Exhibits  annexed  hereto),  or the
offer,  sale or issuance of the  Securities,  or the  consummation  of any other
transaction  contemplated  hereby,  except  as may  be  required  by  applicable
securities laws.

         3.10  INTELLECTUAL PROPERTY RIGHTS. Except as disclosed in the Reports,
the Company has

                                       -7-

<PAGE>

sufficient  trademarks,  trade names, patent rights,  copyrights and licenses to
conduct its business as presently conducted in the Reports.  Except as disclosed
in the Reports,  to the  knowledge  of the Company,  neither the Company nor its
services is infringing or will infringe any trademark, trade name, patent right,
copyright,  license,  trade secret or other similar right of others currently in
existence;  and there is no claim being made against the Company  regarding  any
trademark,  trade  name,  patent,  copyright,  license,  trade  secret  or other
intellectual  property  right which could (i)  reasonably  be expected to have a
Material Adverse Effect,  or (ii) could reasonably be expected to materially and
adversely affect the ability of the Company to perform its obligations  pursuant
to this Agreement.

         3.11  MATERIAL  CONTRACTS.  Except as set forth in the  Reports  and in
Section 3.24,  the  agreements to which the Company is a party  described in the
Reports are valid agreements,  in full force and effect,  and the Company is not
in breach or default under any of such agreements  which could (i) reasonably be
expected to have a Material  Adverse Effect,  or assets of the Company,  or (ii)
could  reasonably be expected to materially and adversely  affect the ability of
the Company to perform its obligations pursuant to this Agreement.

         3.12  LITIGATION.  Except  as  disclosed  in the  Reports,  there is no
action,  proceeding or  investigation  pending,  or to the  Company's  knowledge
threatened,  against the Company which might result,  either  individually or in
the aggregate,  in any Material Adverse Effect. The Company is not a party to or
subject to the provisions of any order, writ, injunction,  judgment or decree of
any court or government agency or instrumentality  which could (i) reasonably be
expected to have a Material Adverse Effect, or (ii) could reasonably be expected
to  materially  and  adversely  affect the ability of the Company to perform its
obligations pursuant to this Agreement.

         3.13  TITLE TO ASSETS.  Except as set forth in Reports, the Company has
good and marketable title to all properties and material assets described in the
Reports as owned by it, free and clear of any pledge,  lien,  security interest,
encumbrance,  claim or equitable interest other than such as are not material to
the business of the Company.

         3.14  SUBSIDIARIES.  Except as disclosed  in the  Reports,  the Company
does not presently own or control,  directly or indirectly,  any interest in any
other corporation, partnership, association or other business entity.

         3.15  REQUIRED  GOVERNMENTAL  PERMITS.  The Company is in possession of
and  operating  in  material  compliance  with  all  authorizations,   licenses,
certificates,  consents,  orders  and  permits  from  state,  federal  and other
regulatory authorities which are material to the conduct of its business, all of
which are valid and in full force and effect.

         3.16  LISTING.  The  Company  will  maintain  the listing of its Common
Stock on the American Stock Exchange, the successors thereto, or other organized
United  States  market or  quotation  system.  The Company has not  received any
notice,  oral or written,  affecting its continued  listing on such Exchange and
the Company will take no action which would impact its continued

                                       -8-

<PAGE>

listing or eligibility  of the Company for such listing.  The Company is in full
compliance with the requirements for listing on the American Stock Exchange.

         3.17  OTHER OUTSTANDING  SECURITIES/FINANCING  RESTRICTIONS.  Except as
disclosed in the Reports,  the Company has no outstanding  restricted shares, or
shares of Common Stock sold under  Regulation  S,  Regulation  D or  outstanding
under any other  exemption  from  registration,  which are available for sale as
unrestricted ("free trading") stock.

         3.18  REGISTRATION  ALTERNATIVE.  The Company covenants and agrees that
for so  long  as any  of  the  Common  Stock  issuable  upon  conversion  of the
Debentures  remains  outstanding  and  continues to be  "restricted  securities"
within the meaning of Rule 144 under the Act, the Company shall cooperate in all
reasonable  respects in order to permit resales of the  underlying  Common Stock
pursuant to Rule 144 under the Act. The Company and the  Subscribers  shall upon
conversion  of the  Debentures,  provide the  Transfer  Agent any and all papers
necessary to complete the transfer  under Rule 144,  including,  but not limited
to, opinions of counsel to the Transfer Agent, and the Company shall continue to
file all material  required to be filed  pursuant to Sections  13(a) or 15(d) of
the 1934 Act.

         3.19  CAPITALIZATION.  The  authorized  capital  stock  of the  Company
consists of  40,000,000  shares of Common Stock,  $0.01 par value per share,  of
which 15,564,580 are outstanding.  There are 5,000,000 shares of Preferred Stock
authorized and none  outstanding.  All issued and  outstanding  shares of Common
Stock   have  been  duly   authorized,   validly   issued  and  fully  paid  and
nonassessable.

         3.20  DILUTION.  The Company is aware and acknowledges  that conversion
of the  Debentures  would  cause  dilution to  existing  stockholders  and could
significantly increase the outstanding number of shares of Common Stock.

         3.21  EMPLOYEE  RELATIONS.  The  Company is not  involved  in any labor
dispute,  nor, to the knowledge of the Company,  is any such dispute threatened.
None of the Company's  employees is a member of a union and the Company believes
that its relations with its employees are good.

         3.22  ENVIRONMENTAL  LAWS.  To its  knowledge,  the  Company  is (i) in
compliance  with  any and  all  foreign,  federal,  state  and  local  laws  and
regulations  relating  to  the  protection  of  human  health  and  safety,  the
environment  or  hazardous  or  toxic   substances  or  wastes,   pollutants  or
contaminants  and which the Company knows are  applicable to it  ("Environmental
Laws"),  (ii) has  received all permits,  licenses or other  approvals  required
under  applicable  Environmental  Laws to conduct its business,  and (iii) is in
compliance  with all  terms  and  conditions  of any  such  permit,  license  or
approval,  except in each case where one  failure to do so could  reasonably  be
expected to have a Material Adverse Effect.

         3.23  INSURANCE.  The  Company  is insured by  insurers  of  recognized
financial  responsibility  against  such losses and risks and in such amounts as
management of the Company believes to be prudent and customary in the businesses
in which the Company is engaged. The Company has no


                                       -9-

<PAGE>

reason  to  believe  that it will not be able to renew  its  existing  insurance
coverage as and when such  coverage  expires,  or obtain  similar  coverage from
similar  insurers as may be  necessary  to continue  its business at a cost that
would not materially and adversely affect the condition, financial or otherwise,
or the earnings, business or operation of the Company.

         3.24  REPRESENTATIONS.  Notwithstanding any other provision hereof, the
Subscribers  understand and acknowledge  that the Company is in material default
under its senior  bank  facility  with  Imperial  Bank and under its  $1,850,000
Senior Subordinated Secured Debentures due May 25, 1998.

         SECTION 4. FURTHER  REPRESENTATIONS AND WARRANTIES OF THE COMPANY.  For
so long as any Securities held by any of the Subscribers remain outstanding, the
Company acknowledges, represents, warrants and agrees as follows:

         (i)      It will reserve  from its  authorized  but unissued  shares of
                  Common Stock a sufficient  number of shares of Common Stock to
                  permit  the  conversion  in  full  of all  of the  outstanding
                  Securities.

         (ii)     It will  permit the  Subscribers  to  exercise  their right to
                  convert the Debentures  pursuant to the terms contained in the
                  Debentures.

         SECTION 5. OPINION OF COUNSEL.  Each of the Subscribers shall, upon the
Closing,  receive an opinion  from  counsel to the Company as to the matters set
forth in Exhibit D.

         SECTION 6.  OPINION OF COUNSEL  UPON  CONVERSION/TRANSFER.  The Company
will obtain for each Subscriber,  at the Company's expense, any and all opinions
of counsel which may reasonably be required in order to permit the issuance (and
transfer)  of the shares of Common  Stock  upon  conversion  of the  Debentures,
subject only to receipt of a Notice of  Conversion  in the form of Exhibit E and
receipt by counsel of such  representations,  warranties,  and  documents as are
determined by such counsel to be necessary to comply with applicable  securities
laws,  duly  executed  by the  Subscriber  which  shall be  satisfactory  to the
Transfer  Agent,  directing  the  Transfer  Agent to remove the legend  from the
Common Stock  certificate in connection with a sale of such Common Stock, if the
Registration  Statement  has  been  declared  effective  by the  SEC or  another
exemption is available for resale.

         SECTION  7. RULE 144  REPORTING.  With a view to making  available  the
benefits  of  certain  rules  and  regulations  of the SEC which may at any time
permit  the sale of the  Securities  to the  public  without  registration,  the
Company agrees,  for so long as the Securities are held by the  Subscribers,  to
take such action as is necessary to:

         (i)      make and keep public information available, as those terms are
                  understood and defined in Rule 144 under the Act, at all times
                  after the effective date on which the Company  becomes subject
                  to the reporting requirements of the Act or the 1934 Act;


                                      -10-

<PAGE>

         (ii)     file with the SEC in a timely  manner  all  reports  and other
                  documents  required of the Company  under the Act and the 1934
                  Act;

         (iii)    furnish to each Subscriber forthwith,  upon request, a written
                  statement  by  the  Company  as to  its  compliance  with  the
                  reporting  requirements  of said Rule 144,  and of the Act and
                  the 1934 Act, a copy of the most  recent  annual or  quarterly
                  report of the Company, and such other reports and documents of
                  the  Company and other  information  in the  possession  of or
                  reasonably  obtainable by the Company as each  Subscriber  may
                  reasonably   request  in  availing   itself  of  any  rule  or
                  regulation of the SEC allowing any Subscriber to sell any such
                  Securities without registration.

         SECTION  8.   REPRESENTATIONS   AND   WARRANTIES  OF  THE  COMPANY  AND
SUBSCRIBERS.  Each of the  Subscribers,  and  the  Company  represent,  warrant,
covenant, and agree to the other the following with respect to itself:

         8.1  SUBSCRIPTION  AGREEMENT.  This Agreement has been duly authorized,
validly  executed  and  delivered  on  behalf  of the  Company  and  each of the
Subscribers,  and is a valid and binding  agreement,  enforceable  in accordance
with its terms,  subject to general  principles  of equity and to  bankruptcy or
other laws affecting the enforcement of creditors' rights generally.

         8.2  NO-CONFLICT.  The execution and delivery of this Agreement do not,
and the consummation of the transactions  contemplated hereby will not, conflict
with, or result in any violation of, or default (with or without notice or lapse
of time,  or both),  or give  rise to a right of  termination,  cancellation  or
acceleration  of any  obligation or to a loss of a material  benefit,  under any
provision of the  Certificate  of  Incorporation,  and any  amendments  thereto,
bylaws and any amendments  thereto of any  Subscriber or any material  mortgage,
indenture,   lease  or  other  agreement  or  instrument,   permit,  concession,
franchise,  license,  judgment,  order, decree statute, law, ordinance,  rule or
regulation applicable to any Subscriber, or its respective properties or assets.

         8.3  APPROVALS.  Neither the Company,  nor any Subscriber,  is aware of
any authorization, approval or consent of any governmental body which is legally
required  for  the  Company's  issuance  and  sale  of  the  Securities  to  the
Subscribers.

         8.4  INDEMNIFICATION. The Company and each of the Subscribers agrees to
indemnify the other,  and to hold the other  harmless,  from and against any and
all losses,  damages,  liabilities,  costs and  expenses  (including  reasonable
attorneys'  fees)  which the other may sustain or incur in  connection  with the
breach by the  indemnifying  party of any  representation,  warranty or covenant
made by it in this Agreement.

         8.5  TRANSFER  RESTRICTIONS/CONVERSION  HOLDING  PERIOD.  Refer  to the
Debenture annexed hereto as Exhibit A.

         8.6  SHORT SELLING  RESTRICTIONS. The Subscribers  shall be entitled to
accumulate and

                                      -11-

<PAGE>

maintain a short position in the Common Stock subject to the following terms and
conditions:

         (i)      during  the  five  trading  days  immediately  preceding  each
                  Conversion Date as is set forth in the following sentence. The
                  short position which the Subscribers may accumulate on a daily
                  basis during this period shall be limited to ten (10%) percent
                  per  day of  the  principal  amount  of  the  Debenture  being
                  converted with the short  positions  being  cumulative  during
                  this five trading day period.  Irrespective  of whether  there
                  are concurrent or contemporaneous  Conversion Dates within the
                  same five trading day period,  the  Subscribers may accumulate
                  and  maintain   short   positions  on  all  such   conversions
                  independently  of each other in  accordance  with the terms of
                  this section; and/or

         (ii)     in the event the closing  price of the Common Stock is US$4.75
                  (or  higher)  the  Subscribers,  on  a  pro  rata  basis,  may
                  initiate,  or add to, a short position on the next trading day
                  in an amount equal to the average daily total composite volume
                  of the  previous  twenty (20)  trading  days on all  exchanges
                  and/or markets as reported by Bloomberg, L.P.

         (iii)    In no event  shall this  Section  require the  Subscribers  to
                  cover  any  short  sales  that  they may have  made for  short
                  selling pursuant to this Section.

         8.7  RIGHT OF FIRST REFUSAL. The Company agrees that should it elect to
enter into a transaction  for additional  debt or equity  financing  (other than
debt  financing  from a bank or financial  institution)  within the later of two
hundred and forty (240) days after the Closing Date or (ii) the Effective  Date,
the Company will give each Subscriber written notice of the terms and conditions
of such offer (the "ROFR Notice").  Each Subscriber  shall have a right of first
refusal to commit to provide the funds  pursuant to the terms as outlined in the
ROFR  Notice  pro  rata  on  the  basis  of the  Debentures  purchased  by  such
Subscriber.  Each  Subscriber  shall  have  five (5)  business  days to reply in
writing  after  receipt of the ROFR Notice from the  Company.  Such reply may be
sent via facsimile,  receipt  confirmed.  In the event such written reply is not
received by the Company  within such five (5)  business  day period and provided
that the  Subscribers  provide  the full  amount of such  financing  by the date
specified  in the ROFR  Notice,  the Company  shall have the right to conclude a
transaction with another  investor or investors  provided the transaction is not
materially  different  from that outlined to the  Subscriber as provided  herein
above.

         SECTION 9.  RESTRICTIONS ON SHARE ISSUANCES.

         9.1  RESTRICTIONS  ON CONVERSION OF DEBENTURE.  Each  Subscriber or any
subsequent  holder of the Debenture  (the  "Holder")  shall be  prohibited  from
converting any portion of the Debenture  which would result in any Subscriber or
Holder being deemed the beneficial  owner,  in accordance with the provisions of
Rule 13d-3 of the 1934 Act, as amended,  of 4.99% or more of the then issued and
outstanding Common Stock of the Company.


                                      -12-

<PAGE>

         9.2  LIMITATION  ON SHARE  ISSUANCE.  Notwithstanding  anything  to the
contrary  contained herein or in the Debentures,  the number of shares of Common
Stock of the  Company  issuable  pursuant  to the  Debentures  shall not  exceed
3,097,351  shares (being 19.9% of the  15,564,580  shares of Common Stock issued
and outstanding on the date hereof). In the event the number of shares of Common
Stock of the Company  issuable  pursuant  to the  Debentures  exceeds  2,334,687
shares  (being  15%  of  the  15,564,580  shares  of  Common  Stock  issued  and
outstanding on the date hereof),  the Company agrees that it shall,  as promptly
as the  circumstances  permit,  call a  stockholders  meeting for the purpose of
approving  below market price  issuances of Common Stock to the  Subscribers  in
excess  of  2,334,687.  In the event  that the  aforementioned  proposal  is not
ratified  by the  stockholders  and the  number  of  shares  issuable  under the
Debentures exceeds  3,097,351,  the Company will seek a waiver from the American
Stock Exchange to permit such issuances.  If the Company is unable to obtain the
waiver  within twenty (20) days of applying  therefor,  the Company will, at its
option,  either (i) delist the Common Stock from the American Stock Exchange and
include the Common Stock for quotation on the OTC Bulletin  Board or (ii) pay to
the Subscribers the "Economic  Benefit" of that number of shares of Common Stock
that would have been issuable to the  Subscribers  above 3,097,351  shares.  The
"Economic  Benefit" is defined as the number of shares of Common Stock  issuable
to the Subscribers pursuant to the Debentures in excess of 3,097,351, multiplied
by the average  closing Bid Price for the five trading days  preceding the tenth
(10th) trading day after the aforementioned  stockholder  meeting. The "Economic
Benefit"  will be paid within  thirty (30) days after such tenth (10th)  trading
day.

         SECTION  10.  REGISTRATION  OR  EXEMPTION  REQUIREMENTS.  Each  of  the
Subscribers  acknowledges  and understands that the Securities may not be resold
or otherwise  transferred  except in a transaction  registered under the Act and
any  applicable   state  securities  laws  or  unless  an  exemption  from  such
registration  is  available.  Each  of  the  Subscribers  understands  that  the
Securities  will be imprinted  with a legend that  prohibits the transfer of the
Securities  unless (i) they are registered under  applicable  securities laws or
such  registration  is not  required,  or (ii) if the transfer is pursuant to an
exemption from registration,  an opinion of counsel  reasonably  satisfactory to
the Company is obtained to the effect that the transaction is so exempt.

         SECTION 11. LEGEND. The certificates  representing the Securities shall
be subject to a legend  restricting  transfer  under the Act,  such legend to be
substantially as follows:

         "THE  SECURITIES  REPRESENTED  HEREBY HAVE BEEN ACQUIRED FOR INVESTMENT
         AND HAVE NOT BEEN  REGISTERED  UNDER  THE  SECURITIES  ACT OF 1933,  AS
         AMENDED  (THE  "ACT").  SUCH  SECURITIES  MAY NOT BE OFFERED OR SOLD OR
         TRANSFERRED  IN  THE  ABSENCE  OF  SUCH  REGISTRATION  OR AN  EXEMPTION
         THEREFROM UNDER SAID ACT."

         The certificates  representing  these Securities,  and each certificate
issued  in  transfer  thereof,  will  also bear any  legend  required  under any
applicable state securities law.

         SECTION 12.  STOCK DELIVERY  INSTRUCTIONS.  The Debenture  Certificates
shall be delivered to each of the Subscribers on a delivery versus payment basis
as set forth in the Escrow Agreement.


                                      -13-

<PAGE>

         SECTION 13.  CLOSING  DATE.  The date the Escrow Agent (i) receives the
Securities and the Purchase Price, and (ii) the conditions set forth in Sections
14 and 15, and the terms and  conditions  of the Escrow  Agreement  (Exhibit  B)
herein are satisfied or waived, shall be the Closing (the "Closing Date").

         SECTION 14. CONDITIONS TO THE COMPANY'S OBLIGATION TO SELL. Each of the
Subscribers  understands that the Company's obligation to sell the Debentures is
conditioned upon:

         (i)      The receipt and acceptance by the Company of this Subscription
                  Agreement  and all Exhibits duly executed by all other parties
                  thereto;

         (ii)     Delivery  into  escrow  by  each  of the  Subscribers  of good
                  cleared  funds  as  payment  in full for the  purchase  of the
                  Securities;

         (iii)    All  representations and warranties of each of the Subscribers
                  contained  herein  shall  remain  true and  correct  as of the
                  Closing Date; and

         (iv)     The Company shall have obtained all permits and qualifications
                  required   by  any  state  for  the  offer  and  sale  of  the
                  Debentures,  or shall  have  the  availability  of  exemptions
                  therefrom.  At the Closing Date,  the sale and issuance of the
                  Debentures  and the  proposed  issuance  of the  Common  Stock
                  underlying  the Debentures  shall be legally  permitted by all
                  laws and  regulations to which each of the Subscribers and the
                  Company are subject.

         SECTION 15.  CONDITIONS TO  SUBSCRIBER'S  OBLIGATION  TO PURCHASE.  The
Company  understands  that each of the  Subscriber's  obligation to purchase the
Debentures is conditioned upon:

         (i)      Acceptance  by  the  Company  of  each  of  the   Subscriber's
                  Subscription Agreement in the form hereof and due execution by
                  all parties of the Exhibits hereto;

         (ii)     Delivery  into escrow of the original  Securities as described
                  herein;

         (iii)    All  representations  and warranties of the Company  contained
                  herein shall remain true and correct in all material  respects
                  as of the Closing Date;

         (iv)     Receipt of opinion  of  counsel  substantially  in the form of
                  Exhibit D annexed hereto;

         (v)      The Company shall have obtained all permits and qualifications
                  required by any state for the offer and sale of the Debentures
                  or shall have the availability of exemptions therefrom. At the
                  Closing Date, the sale and issuance of the Debentures shall be
                  legally  permitted  by all laws and  regulations  to which the
                  Company and each of the Subscribers are subject.

                                      -14-

<PAGE>
                  
         SECTION 16.  MISCELLANEOUS.

         16.1  GOVERNING LAW/JURISDICTION.  This Agreement will be construed and
enforced in  accordance  with and governed by the laws of the State of New York,
except for matters  arising  under the Act,  without  reference to principles of
conflicts of law.  Each of the parties  consents to the  jurisdiction  of the US
District Court for the Southern  District of the State of New York in connection
with any dispute arising under this Agreement and hereby waives,  to the maximum
extent  permitted by law, any objection,  including any objection based on forum
non  conveniens,  to the bringing of any such  proceeding in such  jurisdiction.
Each party  hereby  agrees  that if another  party to this  Agreement  obtains a
judgment against it in such a proceeding, the party which obtained such judgment
may  enforce  same by  summary  judgment  in the  courts of any state or country
having jurisdiction over the party against whom such judgment was obtained,  and
each party hereby waives any defenses available to it under local law and agrees
to the enforcement of such a judgment.  Each party to this Agreement irrevocably
consents  to the  service of process in any such  proceeding  by the  mailing of
copies thereof by registered or certified mail,  postage prepaid,  to such party
at its address set forth  herein.  Nothing  herein shall affect the right of any
party to serve process in any other manner permitted by law.

         16.2  CONFIDENTIALITY.  The Company and each of the Subscribers  agrees
to keep  confidential and not to disclose to or use for the benefit of any third
party the terms of this Agreement  (including the names of the  Subscribers)  or
any other  information  which at any time is  communicated by the other party as
being  confidential  without  the prior  written  approval  of the other  party;
provided,  however, that this provision shall not apply to information which, at
the time of  disclosure,  is already part of the public domain (except by breach
of this Agreement) and information  which is required to be disclosed by law. If
for  any  reason  the  transactions  contemplated  by  this  Agreement  are  not
consummated,  each of the  parties  hereto  shall  keep  confidential  any  such
information  obtained  from  any  other  party,   including  the  names  of  the
Subscribers  (except  information  publicly  available or in such party's domain
prior to the date  hereof,  and  except as  required  by court  order) and shall
promptly return to the other parties all schedules, documents, instruments, work
papers  or  other  written   information,   without  retaining  copies  thereof,
previously  furnished  by it as a  result  of this  Agreement  or in  connection
herewith.

         16.3  FACSIMILE/COUNTERPARTS/ENTIRE   AGREEMENT.  Except  as  otherwise
stated herein, in lieu of the original, a facsimile  transmission or copy of the
original shall be as effective and  enforceable as the original.  This Agreement
may be executed in counterparts  which shall be considered an original  document
and which together shall be considered a complete  document.  This Agreement and
Exhibits hereto  constitute the entire agreement between the Subscribers and the
Company with respect to the subject matter hereof. This Agreement may be amended
only by a writing executed by all parties.

         16.4  SEVERABILITY.  In the event that any provision of this  Agreement
becomes or is


                                      -15-

<PAGE>

declared by a court of competent  jurisdiction to be illegal,  unenforceable  or
void,  this  Agreement  shall  continue  in full force and effect  without  said
provision;  provided  that  no  such  severability  shall  be  effective  if  it
materially changes the economic benefit of this Agreement to any party.

         16.5  RELIANCE BY COMPANY.  Each of the  Subscribers  represents to the
Company that the  representations  and warranties of each  Subscriber  contained
herein  are  complete  and  accurate  and may be relied  upon by the  Company in
determining the availability of an exemption from registration under federal and
state securities laws in connection with a private offering of securities.

         16.6  LEGAL  FEES AND  EXPENSES.  Each of the parties shall pay its own
fees and expenses  (including the fees of any accountants,  appraisers or others
engaged by such party) in connection  with this  Agreement and the  transactions
contemplated hereby,  except that the Company agrees to pay on the Closing Date,
out of the Purchase Price, fees, in cash, to Goldstein,  Goldstein,  & Reis, LLP
the sum equal of $17,500.

         16.7  AUTHORIZATION.  Each of the parties  hereto  represents  that the
individual   executing   this   Agreement  on  its  behalf  has  been  duly  and
appropriately authorized to execute the Agreement.

         16.8  NOTICES. All notices, demands, requests, consents, approvals, and
other  communications  required or permitted  hereunder shall be in writing and,
unless  otherwise  specified  herein,  shall  be  (i)  personally  served,  (ii)
deposited  in the mail,  registered  or  certified,  return  receipt  requested,
postage  prepaid,  (iii) delivered by reputable air courier service with charges
prepaid, or (iv) transmitted by hand delivery, telegram, or facsimile, addressed
as set forth below or to such other  address as such party shall have  specified
most recently by written notice. Any notice or other  communication  required or
permitted to be given hereunder shall be deemed effective (a) upon hand delivery
or  delivery  by  facsimile,   with  accurate  confirmation   generated  by  the
transmitting  facsimile  machine,  at the address or number designated below (if
delivered on a business day during normal business hours where such notice is to
be received),  or the first  business day following  such delivery (if delivered
other than on a business day during normal  business  hours where such notice is
to be received), (b) on the second business day following the date of mailing by
reputable  courier service,  fully prepaid,  addressed to such address,  or upon
actual receipt of such mailing,  whichever shall first occur or (c) on the fifth
business day following date of mailing by registered or certified  mail,  return
receipt requested,  postage prepaid,  addressed to such address,  or upon actual
receipt of such  mailing,  whichever  shall first occur.  The addresses for such
communications shall be:

         (i)      If to the Company:

                      Datametrics Corporation
                      25B Hanover Road No. 3305
                      Florham Park, NJ 07932
                      Attn: Daniel P. Ginns, CEO
                      Telephone: (973) 377-3900
                      Facsimile: (973) 377-5736


                                      -16-

<PAGE>

                  With a copy to:

                      Lane Altman & Owens LLP
                      101 Federal Street
                      Boston, MA 02110
                      Attn:  Joseph Mazzella
                      Telephone:  (617) 345-9800
                      Facsimile:  (617) 345-0400

         (ii)     If to the Subscribers,  at the addresses and numbers listed on
                  Schedule A annexed hereto.

                  Any party  hereto may from time to time  change its address or
                  facsimile  number for notices  under this Section by giving at
                  least ten (10)  days'  prior  written  notice of such  changed
                  address or facsimile number to the other party hereto.

         16.9  ADJUSTMENTS.  Any  references  to the price of the  Common  Stock
shall be adjusted  proportionately to reflect any adjustments due to the payment
of a stock  dividend,  stock split,  combination  of shares or any other similar
event prior to the closing.

                  [Remainder of Page Intentionally Left Blank]

                            [Signature Page Follows]


                                      -17-

<PAGE>

         IN  WITNESS  WHEREOF,  this  7%  Convertible   Debenture   Subscription
Agreement was duly executed on the date first written below.

Agreed to and Accepted on
this 24th day of July 1998


DATAMETRICS CORPORATION


By: /s/ Ronald Lefkon
    -------------------------------
    Name: Ronald Lefkon
    Title: Vice President and 
           Chief Financial Officer



                                           LITTLE WING, L.P.


                                           By: /s/ Bic Nguyen
                                              ----------------------------------
                                              Name: Bic Nguyen
                                              Title: Authorized Signatory


                                           TRADEWINDS FUND LTD.


                                           By: /s/ Bic Nguyen
                                              ----------------------------------
                                              Name: Bic Nguyen
                                              Title: Authorized Signatory


                                           LITTLE WING TOO, L.P.


                                           By: /s/ Bic Nguyen
                                              ----------------------------------
                                              Name: Bic Nguyen
                                              Title: Authorized Signatory


                                      -18-

<PAGE>

                                   SCHEDULE A

                               LIST OF PURCHASERS
                               ------------------


LITTLE WING, L.P.
- -----------------

Little Wing, L.P.
c/o Quilcap Corp.
375 Park Avenue, Suite 1404
New York, New York  10152
$540,000


TRADEWINDS FUND LTD.
- --------------------

Tradewinds Fund Ltd.
c/o Quilcap Corp.
375 Park Avenue, Suite 1404
New York, New York  10152
$400,000

LITTLE WING TOO, L.P.
- ---------------------

Little Wing Too, L.P.
c/o Quilcap Corp.
375 Park Avenue, Suite 1404
New York, New York  10152
$60,000


                                      -19-


<PAGE>

                                    EXHIBITS

                                    (OMITTED)





                                      -20-


                                                                     EXHIBIT 4.2
                                                                     -----------

No.                                                                 $      USD
   ----                                                               ----- 

                             DATAMETRICS CORPORATION

                     Convertible Debenture due July 24, 2001

THIS  DEBENTURE HAS NOT BEEN  REGISTERED  UNDER THE  SECURITIES  ACT OF 1933, AS
AMENDED (THE "SECURITIES ACT") OR ANY OTHER APPLICABLE STATE SECURITIES LAWS AND
HAS BEEN ISSUED IN RELIANCE UPON  REGULATION D PROMULGATED  UNDER THE SECURITIES
ACT AND AN EXEMPTION  UNDER  APPLICABLE  STATE  SECURITIES  LAWS. THIS DEBENTURE
SHALL NOT CONSTITUTE AN OFFER TO SELL NOR A SOLICITATION  OF AN OFFER TO BUY THE
DEBENTURE  IN ANY  JURISDICTION  IN WHICH  SUCH OFFER OR  SOLICITATION  WOULD BE
UNLAWFUL.

THIS DEBENTURE MAY NOT BE SOLD, PLEDGED, TRANSFERRED OR ASSIGNED EXCEPT PURSUANT
TO AN  EFFECTIVE  REGISTRATION  STATEMENT  UNDER  THE  SECURITIES  ACT AND UNDER
APPLICABLE  STATE  SECURITIES  LAWS,  OR IN A  TRANSACTION  WHICH IS EXEMPT FROM
REGISTRATION  UNDER THE PROVISIONS OF THE SECURITIES ACT AND UNDER PROVISIONS OF
APPLICABLE STATE SECURITIES LAWS.



         THIS  DEBENTURE  is one of a duly  authorized  issue of  debentures  of
Datametrics  Corporation,  a corporation  duly  organized and existing under the
laws of the State of  Delaware  (the  "ISSUER"),  issued  on July 24,  1998 (the
"Issuance  Date"),  and designated as its 7% Convertible  Debenture due July 24,
2001, in an aggregate  face amount not  exceeding  One Million (USD  $1,000,000)
Dollars.

         This Debenture has been issued under the terms and provisions of the 7%
Convertible Debenture  Subscription  Agreement dated as of July 24, 1998 between
the ISSUER and HOLDER (the "Agreement") and shall be subject to all of the terms
and conditions and entitled to all of the benefits thereof.

         FOR VALUE RECEIVED, the ISSUER promises to pay to
                                                           ---------------------
 

                                       -1-

<PAGE>

the registered holder hereof or its registered  assigns,  if any (the "HOLDER"),
the principal sum of:


                        _________________ ($_________)
                             United States Dollars,


on July 24, 2001 (the "Maturity Date"), and to pay interest,  as outlined below,
at the rate of seven  (7%)  percent  per annum on the  principal  dollar  amount
outstanding for the term of this  Debenture.  Accrual of interest shall commence
on the date hereof.  Interest shall be payable by the ISSUER in cash, quarterly,
commencing  on the first  business  day of the  Company's  next  fiscal  quarter
immediately following the Issuance Date, on that portion of the principal amount
of this  Debenture  which is then  outstanding.  The interest so payable will be
paid to the  person in whose  name this  Debenture  (or one or more  predecessor
Debentures)  is registered on the records of the ISSUER  regarding  registration
and transfers of the Debenture (the "Debenture  Register"),  provided,  however,
that the ISSUER'S  obligation to a transferee of this  Debenture  arises only if
such transfer,  sale or other  disposition is made in accordance  with the terms
and conditions  contained in the  Agreement.  The principal of this Debenture is
payable  as  provided  below in shares of Common  Stock at any time prior to the
Maturity Date upon the HOLDER  exercising its conversion rights set forth below.
In the  event  this  Debenture  is  outstanding  on the  Maturity  Date it shall
automatically  be converted into freely  tradable shares of Common Stock (as set
forth above) as if the HOLDER voluntarily  elected such conversion in accordance
with the procedures, terms and conditions set forth in this Debenture, provided,
that (i) the Common  Stock is listed on the  American  Stock  Exchange  or other
exchange or market in compliance  with Section 3.16 of the  Agreement,  (ii) the
Bid Price is  greater  than One  ($1.00)  Dollar for the ten (10)  Trading  Days
immediately preceding the Maturity Date, (iii) there has not been any suspension
in the trading of the Common Stock on the  American  Stock  Exchange  during the
thirty (30) Trading Days  immediately  preceding the Maturity Date, and (iv) the
ISSUER  has been in  compliance  in all  material  respects  with the  terms and
conditions  of  this  Debenture  and  the  Agreement.  In the  event  all of the
aforementioned  conditions are not satisfied, or the ISSUER is not able to issue
freely tradable shares of Common Stock as set forth above,  the ISSUER agrees to
pay to the HOLDER,  in cash,  within five (5) Trading Days of the Maturity Date,
the dollar value of the number of shares of Common Stock  issuable to the HOLDER
as if the HOLDER had  exercised  its  conversion  rights on the  Maturity  Date,
multiplied  by the closing bid price of the Common Stock on the  Maturity  Date.
Principal  and  interest  are  payable  at the  address  last  appearing  on the
Debenture  Register as  designated  in writing by the HOLDER hereof from time to
time.

         The Debenture is subject to the following additional provisions:

         1.       The  Debenture is  exchangeable  for like  Debentures in equal
                  aggregate  principal  amount of authorized  denominations,  as
                  requested  by the  HOLDER  surrendering  the same.  No service
                  charge  will be made  for such  registration  or  transfer  or
                  exchange,  although the HOLDER shall be responsible  for their
                  own expenses  associated with complying with the  restrictions
                  on transfer of the Debenture in the Agreement.


                                       -2-

<PAGE>

         2.       The ISSUER  shall be entitled to  withhold  from all  payments
                  under this Debenture any amounts required to be withheld under
                  the applicable provisions of the U.S. Internal Revenue Code of
                  1986, as amended, or other applicable laws at the time of such
                  payments.

         3.       This   Debenture   has  been  issued   subject  to  investment
                  representations  of the  original  HOLDER  hereof  and  may be
                  transferred   or  exchanged   only  in  compliance   with  the
                  Securities Act and  applicable  state  securities  laws and in
                  compliance with the  restrictions on transfer  provided in the
                  Agreement.  Prior to the due  presentment for such transfer of
                  this  Debenture,  the  ISSUER  and any agent of the ISSUER may
                  treat  the  person  in  whose  name  this  Debenture  is  duly
                  registered on the  Debenture  Register as the owner hereof for
                  the purpose of  receiving  payment as herein  provided and all
                  other purposes,  whether or not this Debenture is overdue, and
                  neither  the ISSUER nor any such agent  shall be  affected  by
                  notice to the contrary.  The transferee shall be bound, as the
                  original  HOLDER  by  the  same   representations   and  terms
                  described herein and under the Agreement.

         4.       The  HOLDER  is  entitled,  at its  option,  to  convert  this
                  Debenture  in  accordance   with  the   following   terms  and
                  conditions:

                  (a)      At any time after one  hundred  eighty-first  (181st)
                           day from the Issuance Date, the HOLDER may convert up
                           to fifty  (50%)  percent  of the  original  aggregate
                           principal  amount of this  Debenture  on the Issuance
                           Date, at the Conversion Rate set forth below.

                  (b)      At any time after the two hundred forty first (241st)
                           day after the Issuance  Date,  the HOLDER may convert
                           any remaining part of this Debenture then outstanding
                           at the Conversion Rate set forth below.

                  (c)      The HOLDER  may  exercise  its right to  convert  the
                           Debenture by  telecopying  an executed and  completed
                           notice of conversion  (the "Notice of Conversion") to
                           the  ISSUER and  delivering  the  original  Notice of
                           Conversion  and the original  Debenture to the ISSUER
                           by express  courier.  Each  business  date on which a
                           Notice of Conversion is telecopied to and received by
                           the ISSUER in accordance  with the provisions  hereof
                           shall be deemed a "Conversion  Date". The ISSUER will
                           transmit  the  certificates  representing  shares  of
                           Common  Stock   issuable   upon   conversion  of  the
                           Debenture    (together    with    the    certificates
                           representing  the  Debenture not so converted) to the
                           HOLDER via express courier, by electronic transfer or
                           otherwise  within  five (5)  business  days after the
                           Conversion  Date  if  the  ISSUER  has  received  the
                           original  Notice of Conversion and Debenture being so
                           converted  by such  date.  In  addition  to any other
                           remedies which may be available to the HOLDER, in the
                           event that the  ISSUER  fails to effect  delivery  of
                           such  shares of  Common  Stock  within  five (5) such
                           business day period, the HOLDER will be entitled


                                       -3-

<PAGE>

                           to revoke the Notice of  Conversion  by  delivering a
                           notice to such  effect to the  ISSUER  whereupon  the
                           ISSUER and the HOLDER shall each be restored to their
                           respective positions immediately prior to delivery of
                           the Notice of  Conversion.  The Notice of  Conversion
                           and  Debenture   representing   the  portion  of  the
                           Debenture converted shall be delivered as follows:

                           To the ISSUER:

                                    Datametrics Corporation
                                    25B Hanover Road #3305
                                    Florham Park, NJ 07932
                                    Attn: Daniel P. Ginns, CEO
                                    Facsimile: (973) 377-5736
                                    Telephone: (973) 377-3900

                           With a copy to:

                                    Lane Altman & Owens LLP
                                    101 Federal Street
                                    Boston, MA 02110
                                    Attn:  Joseph Mazzella
                                    Facsimile:  (617) 345-9800
                                    Telephone:  (617) 345-0400

                  (d)      In the event  that the  Common  Stock  issuable  upon
                           conversion of the  Debenture is not delivered  within
                           five (5) business  days of receipt by the ISSUER of a
                           valid Notice of  Conversion  and the  Debenture to be
                           converted,  and  the  ISSUER  has not  exercised  its
                           Redemption  rights set forth in Section 14 below, the
                           ISSUER  shall  pay  to  the  HOLDER,  in  immediately
                           available funds, upon demand,  as liquidated  damages
                           for  such  failure  and not as a  penalty,  for  each
                           $100,000  principal  amount of Debenture sought to be
                           converted,  $500 for the first  five days and  $1,000
                           per day  thereafter  that the shares of Common  Stock
                           are not delivered, which liquidated damages shall run
                           from the sixth business day after the Conversion Date
                           up until the time that either the  Conversion  Notice
                           is revoked or the Common Stock is delivered, at which
                           time such liquidated damages shall cease. Any and all
                           payments required pursuant to this paragraph shall be
                           payable only in cash.

                  (e)      Subject to  subsections  (a) through (d) herein,  and
                           subject  to the  ISSUER'S  right to force  conversion
                           pursuant  to its  right  to call  this  Debenture  as
                           provided  in  Section  15  below,  and the  automatic
                           conversion on the Maturity  Date as provided  herein,
                           each  Debenture  shall  be  convertible,  at the sole
                           option of the  HOLDER  into that  number of shares of
                           fully paid


                                       -4-

<PAGE>

                           and nonassessable  shares of Common Stock which is to
                           be derived from dividing the Conversion Amount by the
                           Conversion Price (the "Conversion  Rate. For purposes
                           of this Debenture,  the Conversion  Amount shall mean
                           the principal  dollar  amount of the Debenture  being
                           converted. The Conversion Price shall be equal to the
                           lesser  of:  (i)  $2.125  (2 1/8) per share of Common
                           Stock,  or (ii) eighty  (80%)  percent of the average
                           closing  bid prices of the  Common  Stock for the ten
                           day  trading   period   immediately   preceding   the
                           Conversion  Date.  The  closing  bid  price  shall be
                           deemed to be the reported  last bid price regular way
                           as reported by Bloomberg LP or if unavailable, on the
                           principal national  securities  exchange on which the
                           Common Stock is listed or admitted to trading,  or if
                           the Common Stock is not listed or admitted to trading
                           on any national securities exchange,  the closing bid
                           price as reported by Nasdaq or such other system then
                           in use,  or, if the Common Stock is not quoted by any
                           such  organization,  the  closing  bid  price  in the
                           over-the-counter market as furnished by the principal
                           national  securities  exchange  on which  the  Common
                           Stock is traded.

                  (f)      The number of shares of Common  Stock  issuable  upon
                           the  conversion of the  Debenture and the  Conversion
                           Price shall be subject to adjustment as follows:

                           (i)      In case the ISSUER  shall (A) pay a dividend
                                    on   Common   Stock  in   Common   Stock  or
                                    securities  convertible  into,  exchangeable
                                    for or otherwise  entitling a holder thereof
                                    to  receive  Common  Stock,  (B)  declare  a
                                    dividend payable in cash on its Common Stock
                                    and at substantially the same time offer its
                                    shareholder  a right to purchase  new Common
                                    Stock  (or  securities   convertible   into,
                                    exchangeable  for or  otherwise  entitling a
                                    holder thereof to receive Common Stock) from
                                    proceeds of such  dividend (all Common Stock
                                    so  issued  shall  be  deemed  to have  been
                                    issued as a stock  dividend),  (C) subdivide
                                    its outstanding  shares of Common Stock into
                                    a greater  number of shares of Common Stock,
                                    (D) combine its outstanding shares of Common
                                    Stock  into a  smaller  number  of shares of
                                    Common    Stock,    or    (E)    issue    by
                                    reclassification  of its  Common  Stock  any
                                    shares of Common  Stock of the  ISSUER,  the
                                    number of shares  of Common  Stock  issuable
                                    upon conversion of the Debenture immediately
                                    prior  thereto shall be adjusted so that the
                                    holders of the  Debenture  shall be entitled
                                    to receive after the happening of any of the
                                    events  described above that number and kind
                                    of shares as the holders would have received
                                    had   such    Debenture    been    converted
                                    immediately  prior to the  happening of such
                                    event  or  any  record  date  with   respect
                                    thereto.  Any  adjustment  made  pursuant to
                                    this subdivision shall become effective


                                       -5-

<PAGE>

                                    immediately  after the close of  business on
                                    the  record  date  in the  case  of a  stock
                                    dividend   and   shall   become    effective
                                    immediately  after the close of  business on
                                    the  record  date  in the  case  of a  stock
                                    split,    subdivision,     combination    or
                                    reclassification.

                           (ii)     Any  adjustment  in the numbers of shares of
                                    Common Stock  issuable  hereunder  otherwise
                                    required to be made by this  paragraph  4(c)
                                    will not have to be made if such  adjustment
                                    would not require an increase or decrease in
                                    one (1%)  percent  or more in the  number of
                                    shares  of  Common   Stock   issuable   upon
                                    conversion of the Debenture.

                           (iii)    Whenever  the  number  of  shares  of Common
                                    Stock  issuable  upon the  conversion of the
                                    Debenture is adjusted,  as herein  provided,
                                    the  Conversion  Price shall be adjusted (to
                                    the  nearest  cent)  by   multiplying   such
                                    Conversion Price  immediately  prior to such
                                    adjustment   by  a  fraction  of  which  the
                                    numerator  shall be the  number of shares of
                                    Common Stock issuable upon the conversion of
                                    this  Debenture  immediately  prior  to such
                                    adjustment,  and of  which  the  denominator
                                    shall be the  number  of  shares  of  Common
                                    Stock issuable immediately thereafter.

                  (g)      In the case of any (i) consolidation or merger of the
                           ISSUER into any entity (other than a consolidation or
                           merger that does not result in any  reclassification,
                           conversion,  exchange or  cancellation of outstanding
                           shares of Common  Stock of the  ISSUER),  (ii)  sale,
                           transfer, lease or conveyance of all or substantially
                           all of the  assets of the  ISSUER as an  entirety  or
                           substantially    as    an    entirety,    or    (iii)
                           reclassification, capital reorganization or change of
                           the Common  Stock  (other than solely a change in par
                           value,  or from par value to no par  value),  in each
                           case as a result  of which  shares  of  Common  Stock
                           shall be converted  into the right to receive  stock,
                           securities or other property  (including  cash or any
                           combination thereof), each holder of a Debenture then
                           outstanding   shall  have  the  right  thereafter  to
                           convert  such  share only into the kind and amount of
                           securities,  cash and other property  receivable upon
                           such consolidation,  merger, sale, transfer,  capital
                           reorganization or reclassification by a holder of the
                           number of shares of Common  Stock of the ISSUER  into
                           which  such  Debenture   would  have  been  converted
                           immediately  prior  to  such  consolidation,  merger,
                           sale,    transfer,    capital    reorganization    or
                           reclassification,  assuming  such  holder  of  Common
                           Stock of the ISSUER  (A) is not an entity  with which
                           the  ISSUER  consolidated  or into which such sale or
                           transfer was made,  as the case may be  ("constituent
                           entity"),  or an affiliate of the constituent entity,
                           and (B)  failed  to  exercise  his or her  rights  of
                           election,  if  any,  as to  the  kind  or  amount  of
                           securities, cash and


                                       -6-

<PAGE>

                           other property  receivable  upon such  consolidation,
                           merger,  sale or transfer  (provided that if the kind
                           or  amount  of  securities,  cash or  other  property
                           receivable upon such  consolidation,  merger, sale or
                           transfer  is not the same for  each  share of  Common
                           Stock of the ISSUER  held  immediately  prior to such
                           consolidation, merger, sale or transfer by other than
                           a constituent  entity or an affiliate  thereof and in
                           respect of which the ISSUER  merged into the ISSUE or
                           to which such rights or election  shall not have been
                           exercised   ("non-electing   share"),  then  for  the
                           purpose of this Section (4)(d) the kind and amount of
                           securities,  cash or other property  receivable  upon
                           such consolidation,  merger, sale or transfer by each
                           non-electing share shall be deemed to be the kind and
                           amount so  receivable  per share by a majority of the
                           non-electing   shares).  If  necessary,   appropriate
                           adjustment  shall be made in the  application  of the
                           provision set forth herein with respect to the rights
                           and interest  thereafter  of the HOLDERS,  to the end
                           that the provisions set forth herein shall thereafter
                           correspondingly be made applicable,  as nearly as may
                           reasonably  be, in relation to any shares of stock or
                           other securities or property  thereafter  deliverable
                           on  the  conversion  of  the  Debenture.   The  above
                           provisions   shall   similarly  apply  to  successive
                           consolidations,  mergers, sales,  transfers,  capital
                           reorganizations  and  reclassifications.  The  ISSUER
                           shall not effect any such consolidation, merger, sale
                           or transfer  unless prior to or  simultaneously  with
                           the  consummation  thereof  the  successor  ISSUER or
                           entity (if other than the ISSUER) resulting from such
                           consolidation, merger, sale or transfer shall assume,
                           by written  instrument,  the obligation to deliver to
                           the HOLDER such shares of Common Stock, securities or
                           assets   as,  in   accordance   with  the   foregoing
                           provisions,  such  holder may be  entitled to receive
                           under this paragraph.

                  (h)      The ISSUER will not, by amendment of its  Certificate
                           of  Incorporation  or  through  any   reorganization,
                           recapitalization,  transfer of assets, consolidation,
                           merger,  dissolution,  issue or sale of securities or
                           any other  voluntary  action,  avoid or seek to avoid
                           the  observance or performance of any of the terms to
                           be observed or performed hereunder by the ISSUER, but
                           will  at  all  times  in  good  faith  assist  in the
                           carrying out of all the  provisions of this paragraph
                           and in taking of all such action as may be  necessary
                           or  appropriate  in order to protect  the  conversion
                           rights of the HOLDERS against impairment.

         5.       The HOLDER acknowledges and agrees that the obligations of the
                  ISSUER  hereunder and under the Agreement are  subordinate and
                  junior to the prior payment in full in cash of all Senior Debt
                  and that no payment  may be made by the Company  with  respect
                  hereto at any time when a default exists under any Senior Debt
                  or  upon  the  maturity  of  any  Junior   Debt,   whether  by
                  acceleration  or otherwise.  The HOLDER agrees to execute upon
                  request any Subordination


                                       -7-

<PAGE>

                  Agreement  with the holders of Senior Debt to  effectuate  the
                  foregoing  provisions.  For purposes hereof, Senior Debt shall
                  include all indebtedness for borrowed money of the Company and
                  any  refinancing,   refunding  and  replacement   thereof.  No
                  provision  of  this  Debenture   shall  alter  or  impair  the
                  obligation of the ISSUER, which is absolute and unconditional,
                  upon an  Event  of  Default  (as  defined  below),  to pay the
                  principal  of, and  interest on this  Debenture  at the place,
                  time, and rate, and in the coin or currency herein prescribed.

         6.       The ISSUER hereby  expressly waives demand and presentment for
                  payment,  notice on  nonpayment,  protest,  notice of protest,
                  notice  of  dishonor,  notice  of  acceleration  or  intent to
                  accelerate,  and  diligence  in taking  any  action to collect
                  amounts  called  for  hereunder  and  shall  be  directly  and
                  primarily  liable for the  payment of all sums owing and to be
                  owing hereon, regardless of and without any notice, diligence,
                  act or omission as or with  respect to the  collection  of any
                  amount called for hereunder.

         7.       If one or more of the following  described "Events of Default"
                  shall occur,

                  a.       A trustee,  liquidator or receiver shall be appointed
                           for  the  ISSUER  or for a  substantial  part  of its
                           property  or  business  without  its  consent and not
                           discharged within 10 days; or

                  b.       Any  governmental  agency or any  court of  competent
                           jurisdiction  at the  instance  of  any  governmental
                           agency shall  assume  custody or control of the whole
                           or  any  substantial  portion  of the  properties  or
                           assets of the ISSUER and remains in such  control for
                           longer than 10 days;

                  c.       Bankruptcy reorganization,  insolvency or liquidation
                           proceedings or other proceedings for relief under any
                           bankruptcy  law or any law for the  relief of debtors
                           shall be  instituted by or against the ISSUER and, if
                           instituted  against the ISSUER,  ISSUER  shall by any
                           action or answer  approve of, consent to or acquiesce
                           in  any  such   proceedings  or  admit  the  material
                           allegations  of, or default in  answering  a petition
                           filed  in any  such  proceeding  or such  proceedings
                           shall  not  be  dismissed   within  sixty  (60)  days
                           thereafter; or

                  d.       The  Common  Stock is  delisted  from  trading on the
                           American  Stock  Exchange or the Company has received
                           notice of final action concerning  delisting from the
                           American  Stock Exchange and the Common Stock has not
                           been listed on any other national securities exchange
                           within 60 days thereafter; or

                  e.       The  ISSUER  shall  fail  to pay  the  amount  of the
                           "Economic  Benefit" (as defined in Section 9.2 of the
                           Agreement) within 5 business days after the

                           
                                       -8-

<PAGE>

                           date when due thereunder; or

                  f.       The ISSUER shall have failed to pay interest within 5
                           business days after the date when due hereunder; or

                  g.       The  effectiveness  of  the  Registration   Statement
                           including the shares of Common Stock  underlying this
                           Debenture has been suspended for a period of five (5)
                           trading days.

                  h.       The ISSUER  shall  breach any  material  term of this
                           Debenture,  or the Agreement  (including all exhibits
                           annexed hereto),  and such breach is not cured within
                           10 days after  notice in  writing  from the HOLDER to
                           the ISSUER specifying such default.

                           Then,  or at any  time  thereafter,  and in each  and
                           every such case,  unless such Event of Default  shall
                           have been  waived in  writing  by the  HOLDER  (which
                           waiver  shall  not be  deemed  to be a waiver  of any
                           subsequent  default)  at the option of the HOLDER and
                           in the  HOLDER'S  sole  discretion,  the  HOLDER  may
                           consider this Debenture  immediately due and payable,
                           without presentment,  demand protest or notice of any
                           kind, all of which are hereby expressly  waived,  and
                           HOLDER may immediately, and without expiration of any
                           period of grace,  enforce any and all of the HOLDER'S
                           rights  and  remedies  provided  herein  or any other
                           rights or remedies afforded by law. It is agreed that
                           in the event of such  action,  such  HOLDER  shall be
                           entitled to receive all  reasonable  fees,  costs and
                           expenses  incurred in connection  with  enforcing the
                           rights   granted    hereunder,    including   without
                           limitation  such  reasonable  fees  and  expenses  of
                           attorneys.

         8.       In case any provision of this  Debenture is held by a court of
                  competent  jurisdiction  to be excessive in scope or otherwise
                  invalid or unenforceable or if, any payment hereunder shall be
                  deemed to constitute  usury,  such provision shall be adjusted
                  rather than voided, if possible,  so that it is enforceable to
                  the   maximum   extent   possible,   and  the   validity   and
                  enforceability  of the remaining  provisions of this Debenture
                  will not in any way be affected or impaired thereby.

         9.       In addition to the terms of the Registration  Rights Agreement
                  of even date  herewith,  the  HOLDER  shall  have the right to
                  include  all of the  shares of Common  Stock  underlying  this
                  Debenture  (the  "Registrable  Securities")  as  part  of  any
                  registration of securities  filed by the ISSUER on behalf of a
                  party other than the ISSUER (other than in  connection  with a
                  transaction  contemplated by Rule 145(a) promulgated under the
                  Act or  pursuant  to Form S-8) and must be notified in writing
                  of such filing;  provided,  however, that the HOLDER agrees it
                  shall not have any piggy-back  registration rights pursuant to
                  this Debenture if the shares of


                                       -9-

<PAGE>

                  Common  Stock  underlying  this  Debenture  may be sold in the
                  United States  pursuant to the provisions of Rule 144.  HOLDER
                  shall  have five (5)  business  days to notify  the  ISSUER in
                  writing as to whether  the ISSUER is to include  HOLDER or not
                  include HOLDER as part of the registration; provided, however,
                  that if any  registration  pursuant to this  Section  shall be
                  underwritten,  in whole or in part,  the  Company  may require
                  that  the  Registrable   Securities  requested  for  inclusion
                  pursuant to this  Section be included in the  underwriting  on
                  the same  terms and  conditions  as the  securities  otherwise
                  being  sold  through  the  underwriters.  If in the good faith
                  judgment  of the  underwriter  evidenced  in  writing  of such
                  offering  only a  limited  number  of  Registrable  Securities
                  should be included in such offering,  or no such shares should
                  be included,  the HOLDER, and all other selling  stockholders,
                  shall be  limited  to  registering  such  proportion  of their
                  respective  shares  as shall  equal  the  proportion  that the
                  number of  shares  of  selling  stockholders  permitted  to be
                  registered by the  underwriter  in such offering  bears to the
                  total   number  of  all  shares   then  held  by  all  selling
                  stockholders  desiring to participate in such offering.  Those
                  Registrable Securities which are excluded from an underwritten
                  offering pursuant to the foregoing  provisions of this Section
                  (and all  other  Registrable  Securities  held by the  selling
                  stockholders) shall be withheld from the market by the HOLDERS
                  thereof for a period,  not to exceed  ninety (90) days,  which
                  the underwriter may reasonably determine is necessary in order
                  to effect such  underwritten  offering.  The ISSUER shall have
                  the right to terminate or withdraw any registration  initiated
                  by it under this Agreement prior to the  effectiveness of such
                  registration  whether or not any Debenture  holder  elected to
                  include  securities  in such  registration.  All  registration
                  expenses  incurred  by  the  ISSUER  in  complying  with  this
                  Agreement   shall  be  paid  by  the  ISSUER,   exclusive   of
                  underwriting   discounts,   commissions  and  legal  fees  and
                  expenses for counsel to the HOLDERS of this Debenture.

         10.      This  Debenture  and the  Agreement  (along with all  exhibits
                  attached thereto) constitute the full and entire understanding
                  and  agreement  between  the ISSUER and  HOLDER  with  respect
                  hereto.  Neither  this  Debenture  nor any terms hereof may be
                  amended,  waived,  discharged  or  terminated  other than by a
                  written  instrument  signed by the ISSUER and the HOLDER.  Any
                  capitalized  terms shall have the same meaning as given in the
                  Agreement.  In the event of any  inconsistencies  between this
                  Debenture and the Agreement, the Agreement shall control.

         11.      This   Debenture   shall  be  governed  by  and  construed  in
                  accordance with the laws of the State of New York.

         12.      The  convertibility  of the Debenture shall be restricted such
                  that  the  portion  of  the  Debenture   which,  if  otherwise
                  converted,  would result in HOLDER being deemed the beneficial
                  owner,  in accordance with the provisions of Rule 13d-3 of the
                  1934 Act, of 4.99% or more of the then issued and  outstanding
                  Common Stock, shall


                                      -10-

<PAGE>

                  not be  convertible.  If,  in  accordance  with the  foregoing
                  sentence,  any portion of the Debenture remains  unconvertible
                  on the  Maturity  Date,  the  ISSUER  shall  have  no  further
                  obligation therefor.

         13.      This Debenture, together with all documents referenced herein,
                  embodies the entire  agreement and  understanding  between the
                  parties  hereto with respect to the subject  matter hereof and
                  supersedes   all  prior   oral  or  written   agreements   and
                  understandings  relating  to the  subject  matter  hereof.  No
                  statement, representation,  warranty, covenant or agreement of
                  any kind not  expressly  set  forth in this  Debenture  or the
                  Agreement  shall affect,  or be used to  interpret,  change or
                  restrict, the express terms and provisions of this Debenture.

                  The ISSUER shall have the right to Redeem  this Debenture,  in
                  whole or in part, in cash, at the Redemption Price (as defined
                  below),  provided the HOLDER has forwarded a Conversion Notice
                  to  the  ISSUER  as  set  forth  above   utilizing  the  fixed
                  Conversion Price as stated in Section 4(g)(ii) above. However,
                  in no event shall the ISSUER be  permitted to redeem less than
                  fifty (50%)  percent of the  principal  value of the Debenture
                  being  converted  as set forth in the previous  sentence.  The
                  ISSUER shall be entitled to exercise the Redemption  rights as
                  follows:

                  a.       The ISSUER shall  exercise this  Redemption  right by
                           telecopying written notice (the "Redemption  Notice")
                           to the HOLDER  within one (1)  business day after the
                           Conversion Date.

                  b.       The ISSUER shall wire transfer the appropriate amount
                           of funds  into an  escrow  account  to  complete  the
                           Redemption which shall be on the fifth (5th) business
                           day after the  Redemption  Notice was served upon the
                           party being noticed (the "Redemption Date").

                  c.       In the event the ISSUER  does not wire  transfer  the
                           appropriate  amount of funds into the escrow  account
                           on or before the Redemption  Date, or shall otherwise
                           fail to comply  with the  Redemption  provisions  set
                           forth  herein;  (i) the ISSUER  will be  required  to
                           forward the shares of Common Stock issuable  pursuant
                           to the notice of conversion within three (3) business
                           days after the Redemption  Date by  transmitting  the
                           certificates  representing  shares  of  Common  Stock
                           issuable   upon  the   conversion  of  the  Debenture
                           (together  with  the  certificates  representing  the
                           Debenture not so converted) to the HOLDER via express
                           courier   or  by   electronic   transfer,   (ii)  the
                           Redemption  Notice shall be deemed null and void, and
                           the ISSUER shall have waived its right to Redeem this
                           Debenture  at any  time,  and  (iii) in the event the
                           ISSUER fails to deliver the certificates representing
                           the shares of Common  Stock within three (3) business
                           days after the  Redemption  Date the ISSUER  shall be
                           subject to the full  liquidated  damages as set forth
                           in


                                      -11-

<PAGE>

                           Section  4(f) above  commencing  on the fourth  (4th)
                           business day after the Redemption Date.

                  d.       The  Redemption   Notice  shall  set  forth  (i)  the
                           Redemption  Date,  (ii) the redemption  price,  which
                           shall be  equal  to one  hundred  and  twenty  (120%)
                           percent  of the  principal  amount  of the  Debenture
                           being redeemed,  plus all accrued and unpaid interest
                           (the  "Redemption  Price"),  (iii) a  statement  that
                           interest on the Debenture  being  Redeemed will cease
                           to  accrue  on  such  Redemption  Date,  and  (iv)  a
                           statement of or reference to the conversion right set
                           forth in this Debenture  (including that the right to
                           give a notice of  conversion in respect of any shares
                           to be  Redeemed  shall  terminate  on the  Redemption
                           Date.  If fewer than all of the  principal  amount of
                           the  Debentures  owned by the  HOLDER  are then to be
                           Redeemed, the notice shall specify the amount thereof
                           that is to be called and, if practicable, the numbers
                           of the certificates representing such Debenture.

                  e.       Unless so converted,  at the close of business on the
                           Redemption Date, subject to the conditions  described
                           herein,  the portion of this Debenture being Redeemed
                           shall be automatically  canceled and converted into a
                           right to receive the Redemption Price, and all rights
                           of this Debenture,  including the right to conversion
                           shall  cease  without  further  action.   Immediately
                           following the  Redemption  Date,  provided the ISSUER
                           has  complied  with the terms set forth  herein,  the
                           HOLDER shall  surrender  their original  Debenture at
                           the office of the ISSUER,  and the ISSUER shall issue
                           to the  HOLDER a new  Debenture  Certificate  for the
                           principal amount that remains outstanding, if any.

                  f.       The Redemption Price shall be adjusted proportionally
                           upon any adjustment of the Conversion Price under the
                           terms  hereof  in the  event of any  stock  dividend,
                           stock split, combination of shares or similar event.

                  g.       The  ISSUER   shall  not  be  entitled  to  send  any
                           Redemption Notice and begin the Redemption  procedure
                           hereunder unless it has:

                           (i)      the full amount of the  Redemption  Price in
                                    cash,   available   in  a  demand  or  other
                                    immediately  available  account in a bank or
                                    similar financial institution;

                           (ii)     immediately available credit facilities,  in
                                    the full amount of the Redemption Price with
                                    a bank or similar financial institution; or

                           (iii)    a combination  of the items set forth in (a)
                                    and (b) above,  aggregating  the full amount
                                    of the Redemption Price.


                                      -12-

<PAGE>

                  h.       Upon delivery of the  Redemption  Notice,  the ISSUER
                           and the HOLDER shall agree on reasonable arrangements
                           for a closing of the Redemption of this Debenture.

         15.      In the event the  closing  bid  price of the  Common  Stock is
                  greater than US$4.25 (the "Strike Price") per share for twenty
                  (20) consecutive trading days (the "Call Period"),  the ISSUER
                  shall have the right to "Call" this Debenture,  in whole or in
                  part,  thereby  forcing  conversion by the HOLDER.  The Strike
                  Price  shall  be  adjusted   proportionately  to  reflect  any
                  adjustments  due to the  payment  of a stock  dividend,  stock
                  split, combination of shares or any other similar event.

         The ISSUER may exercise its right to Call by telecopying written notice
(the  "Call  Notice")  to the  HOLDER  within  five (5)  trading  days after the
aforementioned twenty consecutive trading day period.

         Once the  ISSUER  has  exercised  its right to Call by  giving  written
notice to the Holder it shall be deemed  irrevocable.  Each trading day on which
the Call Notice is  telecopied  to and  received by the HOLDER shall be deemed a
Conversion  Date for the purposes of completing  this Call and  calculating  the
number of shares of Common Stock to be issued upon  conversion.  The ISSUER will
transmit the certificates  representing shares of Common Stock issuable pursuant
to the Call (together with the certificates representing the principal amount of
the  Debenture  not  Called,  if any) to the  HOLDER  via  express  courier,  by
electronic  transfer or  otherwise  within five (5) trading  days after the Call
Notice was served upon the HOLDER (the "Call Date").

         The Call  Notice  shall  set forth (i) a  calculation  referencing  the
conversion formula contained herein showing the number of shares of Common Stock
being issued pursuant to this Call,  (ii) a calculation  referencing all accrued
and unpaid  interest  which shall be payable by the ISSUER on or before the Call
Date,  and (iii) a statement  that interest on the  Debenture  being Called will
cease to accrue on such Call Date.  The Call Notice shall be  irrevocable by the
ISSUER,  and it shall  be sent at  least  five  (5)  trading  days  prior to the
expiration of the Call Period to the HOLDER.  If fewer than all of the principal
amount of the  Debentures  owned by the HOLDER  are then to be Called,  the Call
Notice  shall  specify  the  amount  thereof  that  is  to  be  Called  and,  if
practicable, the numbers of the certificates representing such Debenture.

         The  portion of this  Debenture  being  Called  shall be  automatically
canceled and converted  into a right to receive the shares of Common Stock,  and
all rights of this  Debenture,  including  the right to  conversion  shall cease
without  further action.  Immediately  following the Call Date, the HOLDER shall
surrender their original Debenture being called at the office of the ISSUER, and
the  ISSUER  shall  issue to the  HOLDER  a new  Debenture  Certificate  for the
principal amount that remains outstanding, if any.

         The  number of shares of  Common  Stock  issuable  upon the Call of the
Debenture  shall be  adjusted in  accordance  with the  provisions  set forth in
Section 4(h).


                                      -13-

<PAGE>

         Notwithstanding  the  provisions of this Section 15, upon receiving the
Call Notice, the HOLDER shall have the option to force the ISSUER to Redeem that
portion  of the  Debenture  which  has been  Called by the  ISSUER  for a forced
conversion.  The  HOLDER'S  right to force the  ISSUER to Redeem as set forth in
this  paragraph  must be done by  telecopying  written  notice (the  "Redemption
Notice") to the ISSUER  within three (3) trading days after  receipt of the Call
Notice.  The ISSUER shall have five (5) trading  days after  receipt of HOLDER'S
notice of forced  Redemption  as set forth  herein to complete  this  Redemption
which shall be completed in accordance  with Sections  14(b),  (d), (e), (f) and
(h) where the principal  amount of the Debenture  being Redeemed shall equal the
principal amount of the Debenture being Called.

         Any Call or Redemption pursuant to Sections 14 and 15 of this Debenture
shall not be deemed to affect or otherwise  reduce the  Subscriber's  Conversion
rights set forth in this Agreement.

                  [Remainder of page intentionally left blank]


                                      -14-

<PAGE>

         IN WITNESS  WHEREOF,  the ISSUER has caused this  Debenture  to be duly
executed by an officer thereunto duly authorized.




                                           DATAMETRICS CORPORATION


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

Date: July 24, 1998

                                      -15-





                                                                     EXHIBIT 4.3
                                                                     -----------

                          REGISTRATION RIGHTS AGREEMENT

         THIS REGISTRATION  RIGHTS AGREEMENT,  dated as of the 24th day of July,
1998,  among the entities listed on Schedule A (collectively  referred to as the
"Holders"),  and DATAMETRICS  CORPORATION,  a corporation incorporated under the
laws of the state of Delaware, and having its principal place of business at 25B
Hanover Road, No. 3305, Florham Park NJ 07932 (the "Company").

         WHEREAS, the Holders are purchasing from the Company,  pursuant to a 7%
Convertible  Debenture   Subscription  Agreement  dated  the  date  hereof  (the
"Subscription  Agreement"),  an  aggregate of One Million  ($1,000,000)  Dollars
principal amount of the Company's 7% Convertible Debentures; and

         WHEREAS,  as a condition to such  purchase,  the Holders have  required
that the Company grant to the Holders the  registration  rights set forth herein
with  respect  to the shares of Common  Stock of the  Company  ("Common  Stock")
(collectively  hereinafter  referred  to as the "Stock" or  "Securities"  of the
Company) into which the 7% Convertible Debentures may be converted.

         NOW, THEREFORE, the parties hereto mutually agree as follows:

         SECTION 1. REGISTRABLE SECURITIES. As used herein the term "Registrable
Security"  means the  Securities;  provided,  however,  that with respect to any
particular  Registrable Security,  such security shall cease to be a Registrable
Security when, as of the date of determination, (i) it has been registered under
the Securities Act of 1933, as amended (the "1933 Act"), (ii) registration under
the 1933 Act is no longer required for the immediate public distribution of such
security as a result of the  provisions of Rule 144  promulgated  under the 1933
Act, or (iii) it has ceased to be outstanding. The term "Registrable Securities"
means any and/or all of the Securities  falling within the foregoing  definition
of a  "Registrable  Security."  In  the  event  of any  merger,  reorganization,
consolidation, recapitalization or other change in corporate structure affecting
the  Common  Stock,   such  adjustment  shall  be  made  in  the  definition  of
"Registrable  Security"  as is  appropriate  in order to prevent any dilution or
enlargement of the rights granted pursuant to this Section 1.

         SECTION 2.  RESTRICTIONS  ON  TRANSFER.  The  Holders  acknowledge  and
understand that prior to the  registration of the Securities as provided herein,
the Securities are  "restricted  securities" as defined in Rule 144  promulgated
under the Act. The Holders  understand  that no  disposition  or transfer of the
Securities  may be made by the  Holders  in the  absence  of (i) an  opinion  of
counsel to the Company that such transfer may be made without registration under
the 1933 Act or (ii) such registration.


<PAGE>

         SECTION 3.  REGISTRATION RIGHTS.
                     --------------------

         (a)      The  Company  agrees  that it will  use its  best  efforts  to
                  prepare and file with the Securities  and Exchange  Commission
                  ("Commission"),  within ninety (90) days after the date hereof
                  (the "Subscription Date"), a registration  statement under the
                  1933 Act (the "Registration  Statement"),  at the sole expense
                  of the Company (except as provided in Section 3(c) hereof), in
                  respect of all  holders of  Registrable  Securities,  so as to
                  permit a  registered  issuance of the  Registrable  Securities
                  under  the Act.  The  Company  shall  cause  the  Registration
                  Statement to become  effective within one hundred eighty (180)
                  days from  Subscription  Date. The number of shares designated
                  in the  Registration  Statement to be registered  shall be two
                  hundred  (200%)  percent (or such higher number as the Company
                  determines) of the number of Securities that would be required
                  if all  the  Registrable  Securities  were  issued  on the day
                  before the filing of the Registration  Statement.  The Company
                  agrees that it will only include the Registrable Securities in
                  the  Registration  Statement to be filed pursuant to the terms
                  of this Agreement.

         (b)      The  Company   will   maintain   the   effectiveness   of  the
                  Registration Statement or post-effective amendment filed under
                  this  Section  3 hereof  current  under the 1933 Act until the
                  earlier of (i) the date that all of the Registrable Securities
                  have been sold pursuant to the  Registration  Statement,  (ii)
                  the date the  holders  thereof  receive  an opinion of counsel
                  that all of the  Registrable  Securities may be sold under the
                  provisions of Rule 144 (without  volume  limitation)  or (iii)
                  three years after the Closing Date.

         (c)      All fees,  disbursements and out-of-pocket  expenses and costs
                  incurred by the Company in connection with the preparation and
                  filing of the Registration  Statement under  subparagraph 3(a)
                  and in complying with applicable  securities and Blue Sky laws
                  (including,  without limitation, all attorneys' fees) shall be
                  borne  by the  Company.  The  Holders  shall  bear the cost of
                  underwriting discounts and commissions,  if any, applicable to
                  the Registrable  Securities  being registered and the fees and
                  expenses of its counsel.  The Company shall qualify any of the
                  Registrable  Securities for sale in such states as each Holder
                  reasonably designates and shall furnish indemnification in the
                  manner  provided  in Section 6 hereof.  However,  the  Company
                  shall  not be  required  to  qualify  any  of the  Registrable
                  Securities  for sale in any state which will require an escrow
                  or  other  restriction  relating  to the  Company  and/or  the
                  sellers.  The  Company at its  expense  will supply the Holder
                  with copies of the  Registration  Statement and the prospectus
                  or  offering  circular  included  therein  and  other  related
                  documents in such quantities as may be reasonably requested by
                  the Holders.

         (d)      The Company shall not be required by this Section 3 to include
                  a Holder's


                                      -2-

<PAGE>

                  Registrable  Securities in any Registration Statement which is
                  to be filed if, in the opinion of counsel for both the Holders
                  and the Company (or,  should they not agree, in the opinion of
                  another   counsel   experienced   in  securities  law  matters
                  acceptable  to counsel for the Holders  and the  Company)  the
                  proposed   offering  or  other   transfer  as  to  which  such
                  registration  is requested is exempt from  applicable  federal
                  and state  securities laws and would result in all transferees
                  obtaining securities which are not "restricted securities," as
                  defined in Rule 144 under the 1933 Act.

         (e)      In the event  the  Registration  Statement  to be filed by the
                  Company  pursuant to Section  3(a) above is not filed with the
                  Commission  within ninety (90) days from the Subscription Date
                  and/or the Registration Statement is not declared effective by
                  the  Commission  within one hundred eighty (180) days from the
                  Subscription Date, then the Company will pay Holder (pro rated
                  on a daily basis), as liquidated  damages for such failure and
                  not as a penalty,  three (3%) percent of the Purchase Price of
                  the then outstanding  Securities each month until such time as
                  the  Registration  Statement  has been filed  and/or  declared
                  effective.  Such payment of the  liquidated  damages  shall be
                  made  to  the  Holders  in  cash,   immediately  upon  demand,
                  provided, however, that the payment of such liquidated damages
                  shall not relieve the Company from its obligations to register
                  the Securities  pursuant to this Section and shall not relieve
                  the Company from any obligation to pay liquidated damages.

         If the  Company  does not remit the damages to the Holders as set forth
above,  the  Company  will pay the  Holders'  reasonable  costs  of  collection,
including  reasonable attorneys fees, in addition to the liquidated damages. The
registration  of the Securities  pursuant to this provision  shall not affect or
limit Holders' other rights or remedies as set forth in this Agreement.

         (f)      No provision  contained herein shall preclude the Company from
                  selling securities  pursuant to any Registration  Statement in
                  which  it  is  required  to  include  Registrable   Securities
                  pursuant to this Section 3.

         (g)      If at any time or from time to time after the  effective  date
                  of  the  Registration  Statement,  the  Company  notifies  the
                  Holders in writing of the  existence  of a Potential  Material
                  Event (as defined in Section  3(h) below),  the Holders  shall
                  not offer or sell any Registrable  Securities or engage in any
                  other   transaction   involving  or  relating  to  Registrable
                  Securities, from the time of the giving of notice with respect
                  to a  Potential  Material  Event  until such  Holder  receives
                  written notice from the Company that such  Potential  Material
                  Event  either  has been  disclosed  to the public or no longer
                  constitutes a Potential  Material  Event;  provided,  however,
                  that the Company may not so suspend the right to such  holders
                  of  Securities  for more than one (1)  twenty  (20) day period
                  during  any  twelve  month  period,  during  the  periods  the
                  Registration  Statement  is  required  to be in  effect.  If a
                  Potential  Material  Event  shall  occur prior to the date the
                  Registration Statement is filed, then the Company's obligation
                  to file


                                      -3-

<PAGE>

                  the  Registration  Statement  shall be delayed without penalty
                  for not more than twenty (20) days. The Company must give each
                  Holder  notice in writing at least two (2) business days prior
                  to the  first  day  of the  blackout  period  relating  to any
                  potential material event.

         (h)      "Potential Material Event" means any of the following: (a) the
                  possession by the Company of material information not ripe for
                  disclosure  in a  registration  statement;  (b)  any  material
                  engagement or activity by the Company which would be adversely
                  affected by  disclosure  in a  registration  statement at such
                  time; or (c) the  Registration  Statement  would be materially
                  misleading absent the inclusion of such information.

         SECTION 4.  COOPERATION  WITH COMPANY.  Holders will cooperate with the
Company in all respects in  connection  with this  Agreement,  including  timely
supplying all information  reasonably requested by the Company and executing and
returning all documents reasonably requested in connection with the registration
and sale of the Registrable Securities.

         SECTION 5.  REGISTRATION  PROCEDURES.  If and  whenever  the Company is
required by any of the provisions of this  Agreement to effect the  registration
of any of the Registrable Securities under the Act, the Company shall (except as
otherwise provided in this Agreement), as expeditiously as possible:

         (a)      prepare  and file  with the  Commission  such  amendments  and
                  supplements to the  Registration  Statement and the prospectus
                  used in connection  therewith as may be necessary to keep such
                  registration  statement  effective  and  to  comply  with  the
                  provisions  of the Act  with  respect  to the  sale  or  other
                  disposition  of all  securities  covered by such  registration
                  statement  whenever the Holder of such securities shall desire
                  to sell or otherwise dispose of the same (including prospectus
                  supplements  with respect to the sales of securities from time
                  to time in connection with a registration  statement  pursuant
                  to Rule 415 promulgated under the Act);

         (b)      furnish  to each  Holder  such  numbers of copies of a summary
                  prospectus  or  other  prospectus,   including  a  preliminary
                  prospectus or any  amendment or supplement to any  prospectus,
                  in conformity with the requirements of the Act, and such other
                  documents,  as such Holder may reasonably  request in order to
                  facilitate  the  public  sale  or  other  disposition  of  the
                  securities owned by such Holder;

         (c)      register   and   qualify   the   securities   covered  by  the
                  Registration Statement under such other securities or blue sky
                  laws of such  jurisdictions  as the Holders  shall  reasonably
                  request  (subject to the limitations set forth in Section 3(d)
                  above),  and do any and all other acts and things which may be
                  necessary or advisable to enable each Holder to consummate the
                  public sale or other  disposition in such  jurisdiction of the
                  securities owned by such Holder, except that the Company shall
                  not for any such purpose be


                                      -4-

<PAGE>

                  required to qualify to do business as a foreign corporation in
                  any  jurisdiction  wherein it is not so  qualified  or to file
                  therein any general consent to service of process;

         (d)      list such  securities on the American  Stock Exchange or other
                  national  securities  exchange on which any  securities of the
                  Company are then listed,  if the listing of such securities is
                  then permitted under the rules of such exchange;

         (e)      notify each Holder of  Registrable  Securities  covered by the
                  Registration Statement, at any time when a prospectus relating
                  thereto covered by the  Registration  Statement is required to
                  be delivered  under the Act, of the  happening of any event of
                  which it has  knowledge  as a result of which  the  prospectus
                  included  in the  Registration  Statement,  as then in effect,
                  includes an untrue  statement  of a material  fact or omits to
                  state  a  material  fact  required  to be  stated  therein  or
                  necessary to make the statements therein not misleading in the
                  light of the circumstances then existing.

         SECTION 6.  INDEMNIFICATION.
                     ----------------

         (a)      The Company agrees to indemnify and hold harmless the Holders,
                  and each  officer,  director or person,  if any,  who controls
                  each Holder within the meaning of the 1933 Act  ("Distributing
                  Holder") against any losses,  claims,  damages or liabilities,
                  joint  or  several  (which  shall,  for all  purposes  of this
                  Agreement,  include,  but not be  limited  to,  all  costs  of
                  defense and  investigation  and all attorneys' fees), to which
                  the Distributing Holder may become subject, under the 1933 Act
                  or  otherwise,  insofar  as such  losses,  claims,  damages or
                  liabilities  (or actions in respect  thereof)  arise out of or
                  are  based  upon  any  untrue   statement  or  alleged  untrue
                  statement of any material fact  contained in the  Registration
                  Statement,  or  any  related  preliminary  prospectus,   final
                  prospectus,  offering  circular,  notification or amendment or
                  supplement  thereto,  or arise  out of or are  based  upon the
                  omission or alleged  omission to state therein a material fact
                  required  to be  stated  therein  or  necessary  to  make  the
                  statements therein not misleading; provided, however, that the
                  Company  (i) will not be liable in any such case to the extent
                  that any such loss,  claim,  damage or liability arises out of
                  or is  based  upon  an  untrue  statement  or  alleged  untrue
                  statement  or  omission  or  alleged   omission  made  in  the
                  Registration   Statement,    preliminary   prospectus,   final
                  prospectus,  offering  circular,  notification or amendment or
                  supplement  thereto in reliance upon, and in conformity  with,
                  written   information   furnished   to  the   Company  by  the
                  Distributing  Holder,  specifically for use in the preparation
                  thereof,  or (ii) will not pay any amounts paid in  settlement
                  of any loss, claim,  damage or liability if such settlement is
                  effected  without the consent of the  Company,  which  consent
                  shall not be  unreasonably  withheld.  This Section 6(a) shall
                  not  inure to the  benefit  of any  Distributing  Holder  with
                  respect to any person  asserting such loss,  claim,  damage or
                  liability who purchased the Registrable  Securities  which are
                  the subject thereof if the  Distributing  older failed to send
                  or give (in violation of the 1933 Act or the rules and


                                      -5-

<PAGE>

                  regulations  promulgated  thereunder) a copy of the prospectus
                  contained in such Registration  Statement to such person at or
                  prior to the written  confirmation  of such person of the sale
                  of such Registrable Securities,  where the Distributing Holder
                  was  obligated  to do so under  the 1933 Act or the  rules and
                  regulations promulgated  thereunder.  This indemnity provision
                  will be in  addition  to any  liability  which the Company may
                  otherwise have.

         (b)      Each  Distributing  Holder  agrees that it will  indemnify and
                  hold  harmless the Company,  and each  officer,  director,  or
                  person, if any, who controls the Company within the meaning of
                  the  1933  Act,  against  any  losses,   claims,   damages  or
                  liabilities  (which shall, for all purposes of this Agreement,
                  include,  but not be  limited  to,  all costs of  defense  and
                  investigation and all attorneys' fees) to which the Company or
                  any such officer,  director or  controlling  person may become
                  subject  under  the 1933  Act or  otherwise,  insofar  as such
                  losses claims,  damages or liabilities  (or actions in respect
                  thereof)  arise out of or are based upon any untrue  statement
                  or alleged untrue  statement of any material fact contained in
                  the  Registration   Statement,   or  any  related  preliminary
                  prospectus, final prospectus,  offering circular, notification
                  or amendment  or  supplement  thereto,  or arise out of or are
                  based  upon the  omission  or the  alleged  omission  to state
                  therein a  material  fact  required  to be stated  therein  or
                  necessary to make the statements  therein not misleading,  but
                  in each case only to the extent that such untrue  statement or
                  alleged untrue  statement or omission or alleged  omission was
                  made in the Registration  Statement,  preliminary  prospectus,
                  final prospectus, offering circular, notification or amendment
                  or  supplement  thereto in reliance  upon,  and in  conformity
                  with,  written  information  furnished  to the Company by such
                  Distributing  Holder,  specifically for use in the preparation
                  thereof.  This indemnity  provision will be in addition to any
                  liability which the Distributing Holder may otherwise have.

         (c)      Promptly  after  receipt by an  indemnified  party  under this
                  Section 6 of notice of the  commencement  of any action,  such
                  indemnified party will, if a claim in respect thereof is to be
                  made  against the  indemnifying  party  under this  Section 6,
                  notify the indemnifying party of the commencement thereof; but
                  the  omission  so to notify  the  indemnifying  party will not
                  relieve the indemnifying party from any liability which it may
                  have  to  any  indemnified  party  otherwise  than  as to  the
                  particular  item as to  which  indemnification  is then  being
                  sought  solely  pursuant  to this  Section 6. In case any such
                  action  is  brought  against  any  indemnified  party,  and it
                  notifies the indemnifying  party of the commencement  thereof,
                  the  indemnifying  party will be entitled to  participate  in,
                  and,  to the extent that it may wish,  jointly  with any other
                  indemnifying  party  similarly  notified,  assume the  defense
                  thereof,  subject to the  provisions  herein  stated and after
                  notice from the indemnifying  party to such indemnified  party
                  of  its  election  so  to  assume  the  defense  thereof,  the
                  indemnifying  party  will not be  liable  to such  indemnified
                  party under this Section 6 for any legal


                                      -6-

<PAGE>

                  or other expenses  subsequently  incurred by such  indemnified
                  party  in  connection  with the  defense  thereof  other  than
                  reasonable  costs of  investigation,  unless the  indemnifying
                  party shall not pursue the action to its final conclusion. The
                  indemnified  party  shall  have the right to  employ  separate
                  counsel in any such action and to  participate  in the defense
                  thereof,  but the fees and expenses of such counsel  shall not
                  be  at  the   expense  of  the   indemnifying   party  if  the
                  indemnifying  party has assumed the defense of the action with
                  counsel  reasonably  satisfactory  to the  indemnified  party;
                  provided  that if the  indemnified  party is the  Distributing
                  Holder,  the fees and expenses of such counsel shall be at the
                  expense of the  indemnifying  party if (i) the  employment  of
                  such counsel has been  specifically  authorized  in writing by
                  the indemnifying  party, or (ii) the named parties to any such
                  action  (including  any  impleaded  parties)  include both the
                  Distributing   Holder  and  the  indemnifying  party  and  the
                  Distributing  Holder  shall have been  advised by such counsel
                  that there may be one or more legal defenses  available to the
                  indemnifying  party  different  from or in  conflict  with any
                  legal  defenses  which may be  available  to the  Distributing
                  Holder (in which case the  indemnifying  party  shall not have
                  the right to assume the  defense  of such  action on behalf of
                  the Distributing  Holder, it being understood,  however,  that
                  the indemnifying  party shall, in connection with any one such
                  action  or  separate  but  substantially  similar  or  related
                  actions  in the  same  jurisdiction  arising  out of the  same
                  general  allegations or circumstances,  be liable only for the
                  reasonable fees and expenses of one separate firm of attorneys
                  for the Distributing Holder, which firm shall be designated in
                  writing by the  Distributing  Holder).  No  settlement  of any
                  action against an indemnified  party shall be made without the
                  prior written consent of the indemnified  party, which consent
                  shall not be unreasonably withheld.

         SECTION 7.  CONTRIBUTION.  In order to provide  for just and  equitable
contribution  under the 1933 Act in any case in which (i) the indemnified  party
makes a claim for indemnification pursuant to Section 6 hereof but is judicially
determined  (by the entry of a final  judgment or decree by a court of competent
jurisdiction  and the  expiration  of time to appeal  or the  denial of the last
right of appeal)  that such  indemnification  may not be  enforced  in such case
notwithstanding the fact that the express provisions of Section 6 hereof provide
for indemnification in such case, or (ii) contribution under the 1933 Act may be
required  on the  part  of any  indemnified  party,  then  the  Company  and the
applicable Distributing Holder shall contribute to the aggregate losses, claims,
damages  or  liabilities  to which  they may be subject  (which  shall,  for all
purposes of this Agreement, include, but not be limited to, all costs of defense
and  investigation  and  all  attorneys'  fees),  in  either  such  case  (after
contribution  from  others) on the basis of relative  fault as well as any other
relevant  equitable  considerations.  The relative  fault shall be determined by
reference to, among other things, whether the untrue or alleged untrue statement
of a material fact or the omission or alleged  omission to state a material fact
relates to information supplied by the Company on the one hand or the applicable
Distributing  Holder  on the  other  hand,  and the  parties'  relative  intent,
knowledge,  access to  information  and  opportunity  to correct or prevent such
statement or omission. The Company and


                                      -7-

<PAGE>

the  Distributing  Holder  agree  that it  would  not be just and  equitable  if
contribution  pursuant to this Section 7 were  determined by pro rata allocation
or by any  other  method  of  allocation  which  does  not take  account  of the
equitable  considerations  referred  to in this  Section 7. The  amount  paid or
payable by an indemnified  party as a result of the losses,  claims,  damages or
liabilities (or actions in respect thereof)  referred to above in this Section 7
shall be deemed to include any legal or other  expenses  reasonably  incurred by
such  indemnified  party in connection with  investigating or defending any such
action or claim.  No person guilty of fraudulent  misrepresentation  (within the
meaning of Section 11(f) of the 1933 Act) shall be entitled to contribution from
any person who was not guilty of such fraudulent misrepresentation.

         SECTION  8.  NOTICES.  All  notices,   demands,   requests,   consents,
approvals,  and other communications required or permitted hereunder shall be in
writing and, unless otherwise specified herein,  shall be (i) personally served,
(ii) deposited in the mail,  registered or certified,  return receipt requested,
postage  prepaid,  (iii) delivered by reputable air courier service with charges
prepaid, or (iv) transmitted by hand delivery, telegram, or facsimile, addressed
as set forth below or to such other  address as such party shall have  specified
most recently by written notice. Any notice or other  communication  required or
permitted to be given hereunder shall be deemed effective (a) upon hand delivery
or  delivery  by  facsimile,   with  accurate  confirmation   generated  by  the
transmitting  facsimile  machine,  at the address or number designated below (if
delivered on a business day during normal business hours where such notice is to
be received),  or the first  business day following  such delivery (if delivered
other than on a business day during normal  business  hours where such notice is
to be received), (b) on the second business day following the date of mailing by
reputable  courier service,  fully prepaid,  addressed to such address,  or upon
actual receipt of such mailing, whichever shall first occur, or (c) on the fifth
business day  following  the date of mailing by certified  or  registered  mail,
return receipt requested,  postage prepaid,  addressed to such address,  or upon
actual receipt of such mailing,  whichever shall first occur.  The addresses for
such communications shall be:


                                      -8-

<PAGE>

         If to Datametrics Corporation:

                  Datametrics Corporation
                  25B Hanover Road
                  #3305
                  Florham Park, NJ 07932
                  Attn: Daniel P. Ginns, CEO
                  Facsimile: (973) 377-5736
                  Telephone: (973) 377-3900

         With a copy to:

                  Lane Altman & Owens LLP
                  101 Federal Street
                  Boston, MA 02110
                  Attn:  Joseph Mazzella, Jr.
                  Facsimile:  (617) 345-0400
                  Telephone:  (617) 345-9800

         If to the  Holders at the  addresses  set forth on  Schedule A attached
hereto.

         Any party  hereto may from time to time change its address or facsimile
number for  notices  under this  Section by giving at least ten (10) days' prior
written  notice of such changed  address or facsimile  number to the other party
hereto.

         SECTION  9.  ASSIGNMENT.  This  Agreement is binding upon and inures to
the benefit of the parties  hereto and their  respective  heirs,  successors and
permitted assigns. The rights granted the Holders under this Agreement shall not
be assigned without the written consent of the Company,  which consent shall not
be  unnecessarily  withheld.  In the event of a transfer  of the rights  granted
under this  Agreement,  the Holder  agrees that the Company may require that the
transferee comply with reasonable  conditions as determined in the discretion of
the Company.

         SECTION 10.  COUNTERPARTS; FACSIMILE; AMENDMENTS. This Agreement may be
executed  in multiple  counterparts,  each of which may be executed by less than
all of the parties and shall be deemed to be an original  instrument which shall
be enforceable  against the parties actually executing such counterparts and all
of which  together  shall  constitute  one and the same  instrument.  Except  as
otherwise  stated  herein,  in  lieu  of the  original  documents,  a  facsimile
transmission  or  copy of the  original  documents  shall  be as  effective  and
enforceable  as the  original.  This  Agreement may be amended only by a writing
executed by all parties.

         SECTION 11.  TERMINATION  OF  REGISTRATION  RIGHTS.  The rights granted
pursuant to this  Agreement  shall  terminate  as to each Holder (and  permitted
transferees or assignees) upon the


                                      -9-

<PAGE>

occurrence of any of the following:

         (a)      all Holder's  Securities  subject to this  Agreement have been
                  registered;

         (b)      all of such Holder's  Securities subject to this Agreement may
                  be  sold  without  such  registration  pursuant  to  Rule  144
                  promulgated by the SEC pursuant to the Securities Act;

         (c)      all of such Holder's  Securities subject to this Agreement can
                  be sold pursuant to Rule 144(k).

         SECTION 12. HEADINGS.  The headings in this Agreement are for reference
purposes only and shall not affect in any way the meaning or  interpretation  of
this Agreement.

         SECTION 13. GOVERNING LAW: VENUE; JURISDICTION.  This Agreement will be
construed and enforced in accordance  with and governed by the laws of the State
of New York,  except for matters  arising  under the Act,  without  reference to
principles of conflicts of law. Each of the parties consents to the jurisdiction
of the U.S.  District Court sitting in the Southern District of the State of New
York in  connection  with any dispute  arising  under this  Agreement and hereby
waives,  to the maximum extent  permitted by law, any  objection,  including any
objection based on forum non conveniens,  to the bringing of any such proceeding
in such  jurisdiction.  Each party hereby  agrees that if another  party to this
Agreement  obtains a judgment  against it in such a proceeding,  the party which
obtained such judgment may enforce same by summary judgment in the courts of any
country  having  jurisdiction  over the party  against  whom such  judgment  was
obtained,  and each party hereby waives any defenses available to it under local
law and  agrees  to the  enforcement  of such a  judgment.  Each  party  to this
Agreement  irrevocably consents to the service of process in any such proceeding
by the  mailing of copies  thereof by  registered  or  certified  mail,  postage
prepaid,  to such party at its address set forth  herein.  Nothing  herein shall
affect the right of any party to serve process in any other manner  permitted by
law.

         SECTION 14. SEVERABILITY.  If any provision of this Agreement shall for
any reason be held invalid or unenforceable, such invalidity or unenforceability
shall  not  affect  any  other  provision  hereof  and this  Agreement  shall be
construed as if such invalid or unenforceable provision had never been contained
herein.

         SECTION 15.  CAPITALIZED  TERMS.  All  capitalized  terms not otherwise
defined  herein  shall have the  meaning  assigned  to them in the  Subscription
Agreement.

         SECTION  16.  ENTIRE  AGREEMENT.  This  Agreement,  together  with  all
documents  referenced  herein,  embody the entire  agreement  and  understanding
between  the  parties  hereto  with  respect to the  subject  matter  hereof and
supersedes all prior oral or written agreements and  understandings  relating to
the subject matter hereof. No statement,  representation,  warranty, covenant or
agreement


                                      -10-

<PAGE>

of any kind not expressly set forth in this Agreement  shall affect,  or be used
to  interpret,  change or restrict,  the express  terms and  provisions  of this
Agreement.


                                      -11-

<PAGE>

         IN WITNESS  WHEREOF,  the parties hereto have caused this  Registration
Rights Agreement to be duly executed, on the day and year first above written.


                                   DATAMETRICS CORPORATION


                                   By: /s/ Ronald Lefkon
                                       -----------------------------------------
                                       Ronald Lefkon, Chief Financial Officer 
                                       and Vice President

                                   LITTLE WING, L.P.


                                   By: /s/ Bic Nguyen
                                       -----------------------------------------
                                       Name: Bic Nguyen
                                       Title: Authorized Signatory


                                   TRADEWINDS FUND LTD.


                                   By: /s/ Bic Nguyen
                                       -----------------------------------------
                                       Name: Bic Nguyen
                                       Title: Authorized Signatory


                                   LITTLE WING TOO, L.P.


                                   By: /s/ Bic Nguyen
                                       -----------------------------------------
                                       Name: Bic Nguyen
                                       Title: Authorized Signatory


                                      -12-

<PAGE>

                                   SCHEDULE A


LITTLE WING, L.P.
- -----------------

Little Wing, L.P.
c/o Quilcap Corp.
375 Park Avenue, Suite 1404
New York, New York  10152
$540,000


TRADEWINDS FUND LTD.
- --------------------

Tradewinds Fund Ltd.
c/o Quilcap Corp.
375 Park Avenue, Suite 1404
New York, New York  10152
$400,000

LITTLE WING TOO, L.P.
- ---------------------

Little Wing Too, L.P.
c/o Quilcap Corp.
375 Park Avenue, Suite 1404
New York, New York  10152
$60,000



                                      -13-




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