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       # RAD DATA COMMUNICATIONS
       
          SRM-6FC
       
          Modem Type               Data (Asynchronous)                   
          Maximum Data Rate        9600bps                               
          Data Bus                 External                              
          Data Modulation Protocol Proprietary                           
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |     Purpose      | Location |      Purpose      | Location |
          |------------------+----------+-------------------+----------|
          | RS-232/422       |   CN1    | Ground            |   GND    |
          |------------------+----------+-------------------+----------|
          | Receive positive |   +RCV   | Transmit positive |   +XMT   |
          |------------------+----------+-------------------+----------|
          | Receive negative |   -RCV   | Transmit negative |   -XMT   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    ASYNCHRONOUS LENGTH                     |
          |------------------------------------------------------------|
          | Setting    |         JP1/A         |         JP1/B         |
          |------------+-----------------------+-----------------------|
          | 8-bits     | Position 1 & 2 closed | Position 1 & 2 closed |
          |------------+-----------------------+-----------------------|
          | 9-bits     | Position 1 & 2 closed | Position 2 & 3 closed |
          |------------+-----------------------+-----------------------|
          | » 10-bits  | Position 2 & 3 closed | Position 1 & 2 closed |
          |------------+-----------------------+-----------------------|
          | 11-bits    | Position 2 & 3 closed | Position 2 & 3 closed |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         BAUD RATE                          |
          |------------------------------------------------------------|
          | Setting                       |            SW1             |
          |-------------------------------+----------------------------|
          | » 9600bps                     |             0              |
          |-------------------------------+----------------------------|
          | 7200bps                       |             1              |
          |-------------------------------+----------------------------|
          | 4800bps                       |             2              |
          |-------------------------------+----------------------------|
          | 3600bps                       |             3              |
          |-------------------------------+----------------------------|
          | 2400bps                       |             4              |
          |-------------------------------+----------------------------|
          | 1800bps                       |             5              |
          |-------------------------------+----------------------------|
          | 1200bps                       |             6              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      DCE/DTE SELECTOR                      |
          |------------------------------------------------------------|
          | Setting                       |            SW2             |
          |-------------------------------+----------------------------|
          | » DCE                         |             On             |
          |-------------------------------+----------------------------|
          | DTE                           |            Off             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        FLOW CONTROL                        |
          |------------------------------------------------------------|
          | Setting    |         JP1/C         |         JP1/D         |
          |------------+-----------------------+-----------------------|
          | » RTS/DCD  | Position 2 & 3 closed | Position 1 & 2 closed |
          |------------+-----------------------+-----------------------|
          | DTR/DSR    | Position 1 & 2 closed | Position 2 & 3 closed |
          |------------+-----------------------+-----------------------|
          | Illegal    | Position 2 & 3 closed | Position 2 & 3 closed |
          |------------+-----------------------+-----------------------|
          | Illegal    | Position 1 & 2 closed | Position 1 & 2 closed |
          +------------------------------------------------------------+