RAD DATA COMMUNICATIONS
ASM-20 V.24 AND X.21
|
Modem Type |
Data (Synchronous) |
|
Maximum Data Rate |
144Kbps |
|
Data Bus |
External |
|
Data Modulation Protocol |
Proprietary |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
V.24/X.21/RS-530 |
CN1 |
Diagnostic test switch |
DIG |
|
AC power |
CN2 |
Analog loopback switch |
ANA |
|
Ground |
GND |
Remote loopback switch |
REM |
|
Receive |
RCV |
Test pattern |
PATT |
|
Transmit |
XMT | ||
|
ANALOG LOOPBACK | |
| Setting |
JP7 |
| » Enabled |
Pins 1 & 2 closed |
| Disabled |
Pins 2 & 3 closed |
|
BAUD RATE | |
| Setting |
SW1 |
| 128Kbps |
0 |
| 112Kbps/144Kbps |
1 |
| » 64Kbps |
2 |
| 56Kbps/72Kbps |
3 |
| 48Kbps |
4 |
| 32Kbps |
5 |
|
Note: With the V.24 connector the highest rate is 64Kbps. | |
|
CD SIGNAL | |
| Setting |
JP3 |
| CD normal |
Pins 1 & 2 closed |
| » CD forced high |
Pins 2 & 3 closed |
|
CHASSIS TO SIGNAL GROUND | |
| Setting |
JP10 |
| » Connected |
Pins 2 & 3 closed |
| Disconnected |
Pins 1 & 2 closed |
|
CLOCK SOURCE | |||
| Setting |
JP1/A |
JP1/B |
JP1/C |
| » Internal |
Closed |
Open |
Open |
| External |
Open |
Closed |
Open |
| Receive |
Open |
Open |
Closed |
|
ENABLE PUSHBUTTONS | |
| Setting |
JP9 |
| » DIG, ANA, REM, PATT enabled |
Pins 1 & 2 closed |
| Disabled |
Pins 2 & 3 closed |
|
RECEIVE IMPEDANCE | |
| Setting |
JP6 |
| » 135omhs |
Pins 1 & 2 closed |
| Low |
Pins 2 & 3 closed |
|
REMOTE LOOPBACK | |
| Setting |
JP8 |
| » Enabled |
Pins 2 & 3 closed |
| Disabled |
Pins 1 & 2 closed |
|
REMOTE POWER FAILURE | |
| Setting |
JP12 |
| » Transmit RPF tone |
Pins 1 & 2 closed |
| Doesn’t transmit RPF tone |
Pins 2 & 3 closed |
|
RTS/CTS DELAY | |||
| Setting |
JP2/A |
JP2/B |
JP2/C |
| 0ms |
Closed |
Open |
Open |
| » 9ms |
Open |
Closed |
Open |
| 70ms |
Open |
Open |
Closed |
|
TRANSMIT IMPEDANCE | |
| Setting |
JP5 |
| » 135omhs |
Pins 1 & 2 closed |
| Low |
Pins 2 & 3 closed |
|
TRANSMIT LEVEL | |
| Setting |
JP4 |
| » 0dBm |
Pins 1 & 2 closed |
| -6dBm |
Pins 2 & 3 closed |
|
V.54 DELAY | |
| Setting |
JP11 |
| » On |
Pins 1 & 2 closed |
| Off |
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 |