UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G
                                 (Rule 13d-102)

             Information Statement Pursuant to Rules 13d-1 and 13d-2
                    Under the Securities Exchange Act of 1934

                             Insignia Systems, Inc.
                                (Name of Issuer)

                                  Common Stock
                         (Title of Class of Securities)

                                    45765Y105
                                 (CUSIP Number)

                                 August 12, 2008
             (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

  [     ]   Rule 13d-1(b)
  [  X  ]   Rule 13d-1(c)
  [     ]   Rule 13d-1(d)

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).



                              CUSIP No. 45765Y105

     1.     Names of Reporting Persons. I.R.S. Identification Nos. of above
            persons (entities only)

            Potomac Capital Management LLC
            13-3984298

     2.     Check the Appropriate Box if a Member of a Group (See Instructions)
            (a)     [     ]
            (b)     [     ]

     3.     SEC Use Only

     4.     Citizenship or Place of Organization

            New York

Number of          5.   Sole Voting Power
Shares                  373,235 shares of Common Stock.
Beneficially
Owned by           6.   Shared Voting Power
Each                    0
Reporting
Person With        7.   Sole Dispositive Power
                        0

                   8.    Shared Dispositive Power
                         373,235 shares of Common Stock.

     9.     Aggregate Amount Beneficially Owned by Each Reporting Person
            373,235 shares of Common Stock

     10.    Check if the Aggregate Amount in Row (9) Excludes Certain Shares
            (See Instructions)  [     ]

     11.    Percent of Class Represented by Amount in Row (9)
            2.4%(1)

     12.    Type of Reporting Person (See Instructions)
            HC; OO (Limited Liability Corporation)

____________
(1) Based on 15,592,597 shares of the issuer's common stock outstanding as of
    July 31, 2008.

                                       2



                               CUSIP No. 45765Y105

     1.     Names of Reporting Persons. I.R.S. Identification Nos. of above
            persons (entities only)

            Potomac Capital Management Inc.
            13-3984786

     2.     Check the Appropriate Box if a Member of a Group (See Instructions)
            (a)     [     ]
            (b)     [     ]

     3.     SEC Use Only

     4.     Citizenship or Place of Organization

            Delaware

Number of          5.   Sole Voting Power
Shares                  528,193 shares of Common Stock.
Beneficially
Owned by           6.   Shared Voting Power
Each                    0
Reporting
Person With        7.   Sole Dispositive Power
                        528,193 shares of Common Stock.

                   8.   Shared Dispositive Power
                        0

     9.     Aggregate Amount Beneficially Owned by Each Reporting Person
            528,193 shares of Common Stock.

     10.    Check if the Aggregate Amount in Row (9) Excludes Certain Shares
            (See Instructions)  [     ]

     11.    Percent of Class Represented by Amount in Row (9)
            3.4%(2)

     12.    Type of Reporting Person (See Instructions)
            HC; CO

____________
(2) Based on 15,592,597 shares of the issuer's common stock outstanding as of
    July 31, 2008.

                                       3




                               CUSIP No. 45765Y105

     1.     Names of Reporting Persons. I.R.S. Identification Nos. of above
            persons (entities only)

            Paul J. Solit

     2.     Check the Appropriate Box if a Member of a Group (See Instructions)
            (a)     [     ]
            (b)     [     ]

     3.     SEC Use Only

     4.     Citizenship or Place of Organization

            U.S.

Number of          5.   Sole Voting Power
Shares                  6,500 shares of Common Stock
Beneficially
Owned by           6.   Shared Voting Power
Each                    901,428 shares of Common Stock
Reporting
Person With        7.   Sole Dispositive Power
                        6,500 shares of Common Stock

                   8.   Shared Dispositive Power
                        901,428 shares of Common Stock


     9.     Aggregate Amount Beneficially Owned by Each Reporting Person
            907,928 shares of Common Stock

     10.    Check if the Aggregate Amount in Row (9) Excludes Certain Shares
            (See Instructions)  [     ]

     11.    Percent of Class Represented by Amount in Row (9)
            5.8%(3)

     12.    Type of Reporting Person (See Instructions)
            IN; HC

____________
(3) Based on 15,592,597 shares of the issuer's common stock outstanding as of
    July 31, 2008.

                                       4



Item 1.
           (a)  Name of Issuer

                Insignia Systems, Inc.

           (b)  Address of Issuer's Principal Executive Offices
                6470 Sycamore Court North
                Maple Grove, MN 55367

Item 2.
           (a)  Name of Person Filing

                (i)   Potomac Capital Management LLC;
                (ii)  Potomac Capital Management Inc.; and
                (iii) Paul J. Solit

           (b)  Address of Principal Business Office or, if none, Residence
                (i), (ii), and (iii)

                825 Third Avenue,
                33rd Floor
                New York, New York 10022

           (c)  Citizenship

                (i)   New York
                (ii)  Delaware
                (iii) U.S.

           (d)   Title of Class of Securities
                 Common Stock, par value $0.01 per share

           (e)   CUSIP Number
                 45765Y105

Item 3.    Not Applicable

Item 4.      Ownership
Provide the following information regarding the aggregate number and percentage
of the class of securities of the issuer identified in Item 1.

             Potomac Capital Management LLC

             (a) Amount beneficially owned: 373,235 shares of Common Stock.
             (b) Percent of class: 2.4%
             (c) Number of shares as to which the person has:
                 (i)   Sole power to vote or to direct the vote    0
                 (ii)  Shared power to vote or to direct the vote
                       373,235 shares of Common Stock.
                 (iii) Sole power to dispose or to direct the disposition of 0
                 (iv)  Shared power to dispose or to direct the disposition of
                       373,235 shares of Common Stock.

             Potomac Capital Management Inc.

             (a) Amount beneficially owned: 528,193 shares of Common Stock.
             (b) Percent of class: 3.4%
             (c) Number of shares as to which the person has:
                 (i)   Sole power to vote or to direct the vote
                       528,193 shares of Common Stock.
                 (ii)  Shared power to vote or to direct the vote 0
                 (iii) Sole power to dispose or to direct the disposition of
                       528,193 shares of Common Stock.
                 (iv)  Shared power to dispose or to direct the disposition of 0

             Paul J. Solit

             (a) Amount beneficially owned: 907,928 shares of Common Stock.
             (b) Percent of class: 5.8%
             (c) Number of shares as to which the person has:
                (i)   Sole power to vote or to direct the vote
                      901,428 shares of Common Stock.
                (ii)  Shared power to vote or to direct the vote
                      907,928 shares of Common Stock.
                (iii) Sole power to dispose or to direct the disposition of
                      901,428 shares of Common Stock.
                (iv)  Shared power to dispose or to direct the disposition of
                      907,928 shares of Common Stock.

                                       5



Item 5.      Ownership of Five Percent or Less of a Class
If this Statement is being filed to report the fact that as of the date hereof
the Reporting Persons have ceased to be the beneficial owner of more than five
percent of the class of securities, check the following [ ]


Item 6.      Ownership of More than Five Percent on Behalf of Another Person

                    Not Applicable.

Item 7.      Identification and Classification of the Subsidiary Which Acquired
             the Security Being Reported on By the Parent Holding Company or
             Control Person

             See Exhibit A attached hereto.

Item 8.      Identification and Classification of Members of the Group

             Not Applicable.

Item 9.      Notice of Dissolution of Group

             Not Applicable.

Item 10.     Certification
By signing below I certify that, to the best of my knowledge and belief, the
securities referred to above were not acquired and are not held for the purpose
of or with the effect of changing or influencing the control of the issuer of
the securities and were not acquired and are not held in connection with or as a
participant in any transaction having that purpose or effect.

                                       6



                                    Signature

After reasonable inquiry and to the best of its knowledge and belief, the
undersigned certify that the information set forth in this statement is true,
complete and correct.


Dated this 9th day of September, 2008

                                         POTOMAC CAPITAL MANAGEMENT LLC

                                         By:   /s/ Paul J. Solit
                                               ------------------------------
                                               Paul J. Solit, Managing Member

                                         POTOMAC CAPITAL MANAGEMENT INC.

                                         By:   /s/ Paul J. Solit
                                               ------------------------------
                                               Paul J. Solit, President

                                         PAUL J. SOLIT

                                         By:   /s/ Paul J. Solit
                                               ------------------------------
                                               Paul J. Solit





EXHIBIT INDEX

The following exhibits are filed with this report on Schedule 13G:

Exhibit A     Identification of entities which acquired the shares which are the
              subject of this report on Schedule 13G.

Exhibit B     Joint Filing Agreement dated September 9, 2008 among Potomac
              Capital Management LLC, Potomac Capital Management, Inc. and
              Paul J. Solit.