RAD DATA COMMUNICATIONS
=======================

   ASM-45

   Modem Type               Data (Synchronous)                    
   Maximum Data Rate        768Kbps                               
   Data Bus                 External                              
   Data Modulation Protocol Proprietary                           

<gopher://bitreich.org/I/th99/t/P-R/51526-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |     Purpose      | Location |      Purpose      | Location |
   |------------------+----------+-------------------+----------|
   | V.35/X.21/RS-530 |   CN1    | Fuse              |   FUSE   |
   |------------------+----------+-------------------+----------|
   | AC power         |   CN2    | Digital loopback  |   DIG    |
   |                  |          | switch            |          |
   |------------------+----------+-------------------+----------|
   | Ground           |   GND    | Analog loopback   |   ANA    |
   |                  |          | switch            |          |
   |------------------+----------+-------------------+----------|
   | Receive          |   RCV    | Remote loopback   |   REM    |
   |                  |          | switch            |          |
   |------------------+----------+-------------------+----------|
   | Transmit         |   XMT    | Test pattern      |   PATT   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      ANALOG LOOPBACK                       |
   |------------------------------------------------------------|
   | Setting                    |              JP5              |
   |----------------------------+-------------------------------|
   | Enabled                    |       Pins 2 & 3 closed       |
   |----------------------------+-------------------------------|
   |>> Disabled                 |       Pins 1 & 2 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         BAUD RATE                          |
   |------------------------------------------------------------|
   | Setting   |  JP1/A  |  JP1/B  |  JP1/C  |  JP1/D  | JP1/E  |
   |-----------+---------+---------+---------+---------+--------|
   | 768Kbps   | Closed  |  Open   |  Open   |  Open   |  Open  |
   |-----------+---------+---------+---------+---------+--------|
   | 512Kbps   |  Open   | Closed  |  Open   |  Open   |  Open  |
   |-----------+---------+---------+---------+---------+--------|
   | 384Kbps   |  Open   |  Open   | Closed  |  Open   |  Open  |
   |-----------+---------+---------+---------+---------+--------|
   |>> 256Kbps |  Open   |  Open   |  Open   | Closed  |  Open  |
   |-----------+---------+---------+---------+---------+--------|
   | 128Kbps   |  Open   |  Open   |  Open   |  Open   | Closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         CD SIGNAL                          |
   |------------------------------------------------------------|
   | Setting                     |             JP3              |
   |-----------------------------+------------------------------|
   | CD normal                   |      Pins 2 & 3 closed       |
   |-----------------------------+------------------------------|
   |>> CD forced high            |      Pins 1 & 2 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CHASSIS TO SIGNAL GROUND                  |
   |------------------------------------------------------------|
   | Setting                    |              JP9              |
   |----------------------------+-------------------------------|
   |>> Connected                |       Pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   | Disconnected               |       Pins 2 & 3 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        CLOCK SOURCE                        |
   |------------------------------------------------------------|
   | Setting       |    JP2/A     |    JP2/B     |    JP2/C     |
   |---------------+--------------+--------------+--------------|
   | External      |    Closed    |     Open     |     Open     |
   |---------------+--------------+--------------+--------------|
   |>> Internal    |     Open     |    Closed    |     Open     |
   |---------------+--------------+--------------+--------------|
   | Receive       |     Open     |     Open     |    Closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      REMOTE LOOPBACK                       |
   |------------------------------------------------------------|
   | Setting                    |              JP6              |
   |----------------------------+-------------------------------|
   | Enabled                    |       Pins 2 & 3 closed       |
   |----------------------------+-------------------------------|
   |>> Disabled                 |       Pins 1 & 2 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       TRANSMIT LEVEL                       |
   |------------------------------------------------------------|
   | Setting                    |              JP4              |
   |----------------------------+-------------------------------|
   |>> 0dBm                     |       Pins 2 & 3 closed       |
   |----------------------------+-------------------------------|
   | -6dBm                      |       Pins 1 & 2 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         V.54 DELAY                         |
   |------------------------------------------------------------|
   | Setting                    |              JP7              |
   |----------------------------+-------------------------------|
   |>> Off                      |       Pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   | On                         |       Pins 2 & 3 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     X.21 CLOCK SOURCE                      |
   |------------------------------------------------------------|
   | Setting                    |              JP8              |
   |----------------------------+-------------------------------|
   | External                   |       Pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   |>> Internal                 |       Pins 2 & 3 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      |
   |------+--------+----------+---------------------------------|
   | ERR  | Yellow |    On    |     Errors in test pattern      |
   |------+--------+----------+---------------------------------|
   | ERR  | Yellow |   Off    |        Good test pattern        |
   +------------------------------------------------------------+