RAD DATA COMMUNICATIONS
MTM-15
|
Modem Type |
Data (synchronous/asynchronous) |
|
Maximum Data Rate |
19.2Kbps |
|
Data Bus |
External |
|
Data Modulation Protocol |
Proprietary |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
RS-232/422 |
CN1 |
Digital loopback switch |
DIG |
|
DC power |
CN2 |
Local loopback switch |
ANA |
|
Transmit |
XMT |
Remote digital loopback switch |
REM |
|
Receive |
RCV |
Test switch |
PATT |
|
Ground |
GND |
Reset |
RESET |
|
ANALOG LOOPBACK | |
| Setting |
JP3 |
| Enabled |
Pins 1 & 2 closed |
| » Disabled |
Pins 2 & 3 closed |
|
ASYNCHRONOUS TO SYNCHRONOUS DEVIATION | |
| Setting |
SW2/S4 |
| » 12.5% |
Off |
| 25% |
On |
|
BAUD RATE | |
| Setting |
SW1 |
| 1.2Kbps |
0 |
| 2.4Kbps |
1 |
| 4.8Kbps |
2 |
| » 9.6Kbps |
3 |
| 19.2Kbps |
4 |
|
BIT STOP | ||
| Setting |
SW2/S2 |
SW2/S3 |
| 8 bits |
Off |
Off |
| 9 bits |
Off |
On |
| » 10 bits |
On |
Off |
| 11 bits |
On |
On |
|
CD SIGNAL | ||
| Setting |
JP2 Pin 1 & 2 |
JP2 Pin 3 & 4 |
| CD normal |
Open |
Closed |
| » CD forced high |
Closed |
Open |
|
CHASSIS TO SIGNAL GROUND | ||
| Setting |
JP5 Pin 1 & 2 |
JP5 Pin 3 & 4 |
| » Connected |
Closed |
Open |
| Disconnected |
Open |
Closed |
|
CLOCK SOURCE | |||
| Setting |
JP1/A |
JP1/B |
JP1/C |
| » Internal |
Closed |
Open |
Open |
| External |
Open |
Closed |
Open |
| Receive |
Open |
Open |
Closed |
|
RECEIVE IMPEDANCE | ||
| Setting |
JP8 Pin 1 & 2 |
JP8 Pin 3 & 4 |
| » 600 Ohms |
Closed |
Open |
| High |
Open |
Closed |
|
REMOTE LOOPBACK | |
| Setting |
JP4 |
| SQ output |
Pins 1 & 2 closed |
| » Remote loopback |
Pins 2 & 3 closed |
|
SYNCHRONOUS/ASYNCHRONOUS SELECTOR | |
| Setting |
SW2/S1 |
| » Synchronous |
On |
| Asynchronous |
Off |
|
TRANSMISSION LEVEL | |||||
| Setting |
JP6/A |
JP6/B |
JP6/C |
JP6/D |
JP6/E |
| » 0dBm |
Closed |
Open |
Open |
Open |
Open |
| -3dBm |
Open |
Closed |
Open |
Open |
Open |
| -6dBm |
Open |
Open |
Closed |
Open |
Open |
| -9dBm |
Open |
Open |
Open |
Closed |
Open |
| -12dBm |
Open |
Open |
Open |
Open |
Closed |
|
TRANSMIT IMPEDANCE | ||
| Setting |
JP7 Pin 1 & 2 |
JP7 Pin 3 & 4 |
| » 600 Ohms |
Closed |
Open |
| Low |
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 |
|
SQ |
Yellow |
On |
Good line quality |
|
SQ |
Yellow |
Blinking |
Poor line quality |
|
SQ |
Yellow |
Dim |
PATT test failed |
