RAD DATA COMMUNICATIONS

ASM-31

Modem Type             Data (synchronous/asynchronous)
Maximum Data Rate      128Kbps
Data Bus               External
Data Modulation        Proprietary
Protocol

[Image]

                                CONNECTIONS

        Purpose           Location            Purpose           Location

  V.24, V.35, X.21,         CN1        Diagnostic test switch      DIG
  RS-530

  AC power                  CN2        Analog loopback switch      ANA

  Ground                    GND        Remote loopback switch      REM

  Receive                   RCV        Test pattern               PATT

  Transmit                  XMT        Reset switch               RESET



             ANALOG LOOPBACK

  Setting                    JP2

  » Enabled           Pins 2 & 3 closed

  Disabled            Pins 1 & 2 closed

          ASYNC TO SYNC

  Setting             SW1/S1

  » Synchronous         On

  Asynchronous         Off

        BAUD RATE

  Setting        SW7

  600bps          0

  1200bps         1

  2400bps         2

  4800bps         3

  9600bps         4

  19.2Kbps        5

  38.4Kbps        6

  48Kbps          7

  » 64Kbps        9

  128Kbps         A

  57.6Kbps        C

  115.2Kbps       D

         BIT

  Setting    SW1/S2

  » 8 bit      On

  7 bit       Off

               CD SIGNAL

  Setting                 SW1/S6

  » CD forced high          On

  CD normal                 Off

         CHASSIS TO SIGNAL GROUND

  Setting                    JP4

  » Connected         Pins 1 & 2 closed

  Disconnected        Pins 2 & 3 closed

                     CLOCK SOURCE

  Setting         JP1/A         JP1/B        JP1/C

  Loopback       Closed         Open          Open

  » Internal      Open         Closed         Open

  External        Open          Open         Closed

               DSR/DTR

  Setting                SW1/S7

  » Power ON               On

  DSR follows DTR         Off

     PARITY - ON/OFF

  Setting       SW1/S3

  » Enabled       On

  Disabled       Off

  PARITY - EVEN/ODD

  Setting    SW1/S4

  » Even       On

  Odd          Off

             REMOTE LOOPBACK

  Setting                    JP3

  » Enabled           Pins 2 & 3 closed

  Disabled            Pins 1 & 2 closed

            STOP BIT

  Setting           SW1/S5

  » 1 stop bit        On

  2 stop bit          Off

                             DIAGNOSTIC LED(S)

     LED         Color        Status                Condition

     PWR         Green          On                 Power is on

     PWR         Green         Off                 Power is off

     RTS        Yellow          On           Request to Send enabled

     RTS        Yellow         Off           Request to Send disabled

     TD         Yellow          On         Modem is transmitting steady
                                                      SPACE

     TD         Yellow         Off        Modem is not transmitting data

     TD         Yellow       Blinking       Modem is transmitting data

     RD         Yellow          On       Modem is receiving steady SPACE

     RD         Yellow         Off         Modem is not receiving data

     RD         Yellow       Blinking        Modem is receiving data

     DCD        Yellow          On           Carrier signal detected

     DCD        Yellow         Off         Carrier signal not detected

     LOS          Red           On           Loss of synchronization

     LOS          Red          Off             Synchronization ‘OK’

     ERR          Red           On            Errors in test pattern

     ERR          Red          Off              Good test pattern

    TEST        Yellow          On              Modem in test mode

    TEST        Yellow         Off            Modem not in test mode