RAD DATA COMMUNICATIONS

LDV-2

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

[Image]

                                CONNECTIONS

      Purpose           Location            Purpose           Location

  Line out                 CN1        Digital loopback           DLB
                                      switch

  Line in                  CN2        Data clamp and loop       DC-L1
                                      1 test switch

  RS-232                   CN3        Remote digital             RLB
                                      loopback switch

  AC power                 CN4        Fuse                      FUSE

        BAUD RATE

  Setting        SW1

  19.2Kbps        0

  14.4Kbps        1

  9600bps         2

  7200bps         3

  » 4800bps       4

  3600bps         5

  2400bps         6

  1800bps         7

  1200bps         8

   900bps         9

                        CARRIER TRANSMISSION LEVEL

  Setting                    JP5/A            JP5/B            JP5/C

  Long distance              Closed           Open             Open
  (-50dBm)

  » Medium distance           Open           Closed            Open
  (-40dBm)

  Short distance              Open            Open            Closed
  (-30dBm)

                                 CD SIGNAL

  Setting                 JP7/A             JP7/B             JP7/C

  » CD forced high.       Closed            Open               Open

  CD follows RTS           Open            Closed              Open
  signal.

  CD normal.               Open             Open              Closed

       CENTRAL/REMOTE UNIT SELECTOR

  Settings                   JP1

  Central unit        Pins 1 & 2 closed

  » Remote unit       Pins 2 & 3 closed

         CHASSIS TO SIGNAL GROUND

  Setting                    JP8

  Connected           Pins 2 & 3 closed

  » Disconnected      Pins 1 & 2 closed

                     CLOCK SOURCE

  Setting         JP4/A         JP4/B        JP4/C

  External       Closed         Open          Open

  » Internal      Open         Closed         Open

  Receive         Open          Open         Closed

          DATA CLAMP/LOOP1 TEST

  Setting                    JP10

  Enabled             Pins 1 & 2 closed

  » Disabled          Pins 2 & 3 closed

                 ENABLES TEST PUSHBUTTONS

  Setting                                JP9

  » DLB, DC-L1, RLB enabled       Pins 1 & 2 closed

  Disabled                        Pins 2 & 3 closed

              REMOTE LOOPACK

  Setting                    JP11

  Enabled             Pins 1 & 2 closed

  » Disabled          Pins 2 & 3 closed

               RTS/CTS DELAY

  Setting    JP3/A      JP3/B      JP3/C

  0 ms       Closed      Open      Open

  » 8 ms      Open      Closed     Open

  68 ms       Open       Open     Closed

    SYNCHRONOUS/ASYNCHRONOUS SELECTOR

  Settings                   JP2

  Synchronous         Pins 1 & 2 closed

  » Asynchronous      Pins 2 & 3 closed

                           TRANSMIT LEVEL

  Remote/Central mode       JP6/A           JP6/B          JP6/C

  » 0dBm/-6dBm             Closed           Open           Open

  -3dBm/-9dBm               Open           Closed          Open

  -6dBm/-12dBm              Open            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