Dantel 44202 Installation & Operation Manual - Page 11

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44202-0898 <90-00004>
INSTALLATION
NOTE:
If the transmit level cannot be adjusted, the module is defective
and should be replaced
6.
Action: Connect the TMS, set for bridged reading, or a dB meter, to
the test points labeled “RCV” and “GND”. Send the engineered data
level (13dB below tone level) into the 44202 modem from an available
test point. (RCV Line, DST, CXR jack, etc.)
Result: The “CD” LED lights.
7.
Action: Adjust the “RCV GAIN” pot to achieve a -20dBm meter
reading.
NOTE:
If the desired level cannot be reached, remove power from the
shelf and unplug the module. Place the “RCV GAIN” strap in
the “HIGH” position to add 20dB of gain. Replace the module,
reconnect power, and adjust the “RCV GAIN” pot for the
desired level.
If the receive gain cannot be adjusted, the module is defective
and should be replaced.
8.
Action: Remove the data level tone. Place the “TEST” switch in the
OFF position.
9.
This completes the modem alignment.
Analog Loopback Test
1.
Action: Place the “ALB” (analog loopback) switch and the “TEST”
switch in the ON position. Connect a TMS with a speaker to the
“XMT LINE” jack.
Result: You should hear the 1200hz data tone from the modem.
2.
Action: At the distant end, have someone send data to the modem.
Result: You should hear the data they are sending along with the
1200hz tone.
3.
Action: Return the “ALB” and “TEST” switches to OFF and remove
the connection to the TMS.
4.
This completes the analog loopback test.
Digital Loopback Test
1.
Action: Place the “TEST” and “DLB” switches in the ON (up) posi-
tion.
Result: The “RTS”, “DTR”, “CTS”, and “CD” LEDs come on.
2.
Action: Configure a terminal or terminal emulator for 1200 baud, 8
bit word length, 1 stop bit, and no parity. Connect the terminal to the
RS-232 port. Type on the terminal.
Result: The “TD” and “RD” LEDs flash. The data is looped back and
the typed characters are displayed on the screen.
. . .
CONTINUED
P
11
AGE