RAD DATA COMMUNICATIONS

MTM-15

Modem Type             Data (synchronous/asynchronous)
Maximum Data Rate      19.2Kbps
Data Bus               External
Data Modulation        Proprietary
Protocol

[Image]

                                CONNECTIONS

        Purpose           Location           Purpose           Location

  RS-232/422                 CN1        Digital loopback         DIG
                                        switch

  DC power                   CN2        Local loopback           ANA
                                        switch

  Transmit                   XMT        Remote digital           REM
                                        loopback switch

  Receive                    RCV        Test switch              PATT

  Ground                     GND        Reset                   RESET

             ANALOG LOOPBACK

  Setting                    JP3

  Enabled             Pins 1 & 2 closed

  » Disabled          Pins 2 & 3 closed

  ASYNCHRONOUS TO SYNCHRONOUS DEVIATION

  Setting                   SW2/S4

  » 12.5%                     Off

  25%                         On

        BAUD RATE

  Setting        SW1

  1.2Kbps         0

  2.4Kbps         1

  4.8Kbps         2

  » 9.6Kbps       3

  19.2Kbps        4

               BIT STOP

  Setting       SW2/S2      SW2/S3

  8 bits         Off          Off

  9 bits         Off          On

  » 10 bits       On          Off

  11 bits         On          On

                         CD SIGNAL

  Setting              JP2 Pin 1 & 2      JP2 Pin 3 & 4

  CD normal                Open               Closed

  » CD forced high        Closed               Open

             CHASSIS TO SIGNAL GROUND

  Setting         JP5 Pin 1 & 2    JP5 Pin 3 & 4

  » Connected         Closed            Open

  Disconnected         Open            Closed

                     CLOCK SOURCE

  Setting         JP1/A         JP1/B        JP1/C

  » Internal     Closed         Open          Open

  External        Open         Closed         Open

  Receive         Open          Open         Closed

                RECEIVE IMPEDANCE

  Setting         JP8 Pin 1 & 2    JP8 Pin 3 & 4

  » 600 Ohms          Closed            Open

  High                 Open            Closed

              REMOTE LOOPBACK

  Setting                     JP4

  SQ output            Pins 1 & 2 closed

  » Remote loopback    Pins 2 & 3 closed

  SYNCHRONOUS/ASYNCHRONOUS SELECTOR

  Setting                SW2/S1

  » Synchronous            On

  Asynchronous             Off

                       TRANSMISSION LEVEL

  Setting     JP6/A      JP6/B      JP6/C      JP6/D     JP6/E

  » 0dBm     Closed      Open       Open       Open       Open

  -3dBm       Open      Closed      Open       Open       Open

  -6dBm       Open       Open      Closed      Open       Open

  -9dBm       Open       Open       Open      Closed      Open

  -12dBm      Open       Open       Open       Open      Closed

                TRANSMIT IMPEDANCE

  Setting         JP7 Pin 1 & 2    JP7 Pin 3 & 4

  » 600 Ohms          Closed            Open

  Low                  Open            Closed

                             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

     TEST          Red            On             Modem in test mode

     TEST          Red           Off           Modem not in test mode

      SQ          Yellow          On              Good line quality

      SQ          Yellow       Blinking           Poor line quality

      SQ          Yellow         Dim              PATT test failed