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# RAD DATA COMMUNICATIONS
ASM-31
Modem Type Data (synchronous/asynchronous)
Maximum Data Rate 128Kbps
Data Bus External
Data Modulation Protocol Proprietary
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------------+----------+-----------------+----------|
| V.24, V.35, X.21, | CN1 | Diagnostic test | DIG |
| RS-530 | | switch | |
|--------------------+----------+-----------------+----------|
| AC power | CN2 | Analog loopback | ANA |
| | | switch | |
|--------------------+----------+-----------------+----------|
| Ground | GND | Remote loopback | REM |
| | | switch | |
|--------------------+----------+-----------------+----------|
| 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 |
+------------------------------------------------------------+