Optical Link Current Source
                       ---------------------------

                                                          Rev. 17-APR-1993

                     Controls  Indicators  Connectors
                -------------------------------------------


Analog Section
--------------

    Controls:    Analog Section On/Off,  Current Range,  Current Zero

    Indicators:  Meter  Percent of Full Scale Output,   LED's Power On

    Connections: +-12 Volt to +-15 Volt Analog Power Supply Connection,
                 4 Optic Cable Connections,  Output Current Connection

Digital Section
---------------
    Controls:     Power On/Off,  Push to Sweep,  Manual Sweep Toggle Switch,
                  Internal-External Load Toggle Switch,  Sweep Rate 3 Section
                  Lever Wheel Switch,  Target Code Source Select Toggle
                  Switch,  Fixed Target Codes 8 Toggle Switches,  Variable
                  Target Codes 5 Lever Wheel Switches

    Indicators:   Power ON LED,  Output Stable LED,
                  5 Hex LED Output Code Display

    Connections:  AC Mains Power Input,  4 Optic Cable Connectors

    Mains Power Selector:
                            Side 1    100 Volts    A-B, C-D, E-F
                                      220 Volts    A-B, C, D-E, F

                            Side 2    120 Volts    A, B-C-D, E-F
                                      240 Volts    A, B-C, D-E, F