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# RAD DATA COMMUNICATIONS
LDV-2
Modem Type Data (synchronous/asynchronous)
Maximum Data Rate 19.2Kbps
Data Bus External
Data Modulation Protocol Prorietary
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------+----------+---------------------------+----------|
| Line out | CN1 | Digital loopback switch | DLB |
|----------+----------+---------------------------+----------|
| Line in | CN2 | Data clamp and loop 1 | DC-L1 |
| | | test switch | |
|----------+----------+---------------------------+----------|
| RS-232 | CN3 | Remote digital loopback | RLB |
| | | 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 (-50dBm) | Closed | Open | Open |
|----------------------------+----------+----------+---------|
| » Medium distance (-40dBm) | Open | Closed | Open |
|----------------------------+----------+----------+---------|
| Short distance (-30dBm) | Open | Open | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CD SIGNAL |
|------------------------------------------------------------|
| Setting | JP7/A | JP7/B | JP7/C |
|------------------------+-----------+-----------+-----------|
| » CD forced high. | Closed | Open | Open |
|------------------------+-----------+-----------+-----------|
| CD follows RTS signal. | Open | Closed | Open |
|------------------------+-----------+-----------+-----------|
| 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 |
+------------------------------------------------------------+