
RAD DATA COMMUNICATIONS

FCD-2 (V.35)

Card Type                  E1 LTU
Chip Set                   Unidentified
I/O Options                AC power connector, V.35 DTE port, serial port,

                           E1 network interface via 15-pin connector, BNC
                           connectors (2)
E1 Transfer Rate           2.048Mbps
E1 Protocol                HDB3
Frame Type                 CRC-4
Data Bus                   External

[Image]

                                CONNECTIONS

         Function             Label           Function            Label

  AC power connector           CN1      LTU board connector        J3

  Serial port                  CN2      LTU board connector        J4

  34-pin V.35 DTE port         CN3      Power switch               SW2

  15-pin E1 port               CN4      BNC connector -            RX
                                        receive

  LTU board connector           J2      BNC connector -            TX
                                        transmit

  Note:

  Jumpers must be installed on pins 1&2 and 3&4 of connectors J3 & J4 to
  maintain signal path continuity when the LTU board is removed.

                        USER CONFIGURABLE SETTINGS

                  Setting                      Label         Position

     Debug self test mode disabled             JP2          Pins 1 & 2
                                                              closed

      Debug self test mode enabled              JP2          Pins 2 & 3
                                                              closed

     Default password enabled.                 JP3          Pins 2 & 3
      Password=FCD-12                                         closed

      User password enabled                     JP3          Pins 1 & 2
                                                              closed

     Watchdog timer enabled                    JP4          Pins 1 & 2
                                                              closed

      Watchdog timer disabled                   JP4          Pins 2 & 3
                                                              closed

     Signal ground is connected to the         JP12         Pins 2 & 3
      frame ground                                            closed

      Signal ground is not connected to         JP12         Pins 1 & 2
      the frame ground                                        closed

     Internal -5V enabled                      JP22         Pins 1 & 2
                                                              closed

      Grounded to pin 15 in the main link       JP22         Pins 2 & 3
      connector (CN4)                                         closed

     Transmit side ground reference set        JP23           Open
      for balanced interface

      Transmit side ground reference set        JP23          Closed
      for unbalanced interface

     Frame ground is connected to main         JP24          Closed
      link ground reference

      Frame ground is not connected to          JP24           Open
      main link ground reference

     Allows connection of the line             JP25          Closed
      controlled by JP22 to pin 15 of main
      link connector (CN4) for powering
      external device

      Does not allow connection of the          JP25           Open
      line controlled by JP22 to pin 15 of
      main link connector (CN4) for
      powering external device

     Allows connection of internal +5V,        JP26          Closed
      via resistor, to pin 14 of main link
      connector (CN4) for powering
      external device

      Does not allow connection of              JP26           Open
      internal +5V, via resistor, to pin
      14 of main link connector (CN4) for
      powering external device

     Receive side ground reference set         JP27           Open
      for balanced interface

      Receive side ground reference set         JP27          Closed
      for unbalanced interface

                                TERMINATION

            Function                JP18      JP19      JP20       JP21

         Balanced interface       Pins 1     Pins 1    Pins 1   Pins 1 &
        compatibility enabled       & 2        & 2       & 2        2

         Unbalanced interface      Pins 2     Pins 2    Pins 2   Pins 2 &
        compatibility enabled       & 3        & 3       & 3        3

  Note: Pins designated are in the closed position

                             DIAGNOSTIC LED(S)

   LED          Color          Status               Condition

   RTS       Unidentified        On       Control input line in V.35 DTE
                                                   port is high

   RTS       Unidentified       Off       Control input line in V.35 DTE
                                                   port is low

   DCD       Unidentified        On       Indication output line in V.35
                                                 DTE port is high

   DCD       Unidentified       Off       Indication output line in V.35
                                                 DTE port is low

       TD    Unidentified        On       Device is detecting pulses from
                                                  the local DTE

    TD       Unidentified       Off       Device is not detecting pulses
                                                from the local DTE

    RD       Unidentified        On       Device is receiving pulses from
                                                     network

    RD       Unidentified       Off       Device is not receiving pulses
                                                   from network

   LOC       Unidentified        On         Local synchronization lost

   LOC       Unidentified       Off          Local synchronization OK

   REM       Unidentified        On        Remote synchronization lost

   REM       Unidentified       Off         Remote synchronization OK

            TUnidentified        On        Device loopback test active

   TST       Unidentified       Off      device loopback test not running

[Image]

LTU BOARD

                                CONNECTIONS

           Function             Label           Function           Label

  Mainboard connector            J5     Mainboard connector          J7

  Mainboard connector            J6

                        USER CONFIGURABLE SETTINGS

                 Setting                      Label          Position

     Factory configured - do not alter        JP5             Open

     Factory configured - do not alter        JP6             Open

                         E1 OUTPUT LEVEL SELECTIO

                Net build                    Label          Position

                    0dB                      SW1               1

                   -7.5dB                     SW1               2

                    -15dB                     SW1               3

