Comtech EF Data CDM-550T - Manual (Page 45)

CDM-550T Satellite Modem Revision 3
Front Panel Operation MN/CDM550T.IOM
6.2.3.1.5 (CONFIG: TX) ON/OFF
Select either ON, OFF, or RTI, using the [
←] [→] arrow keys, then press ENTER.
SELECT TX OUTPUT STATE:
ON OFF RTI (ENTER)
IMPORTANT
RTI means RECEIVE/TRANSMIT INHIBIT. When selected, it will
prevent the TX carrier from being transmitted, until the demodulator
is locked.
To avoid the Tx Carrier from being turned off when the demodulator loses lock for a very short
period of time, the demodulator must be unlocked continuously for a period of 10 seconds before
the transmit carrier is inhibited. This time interval is fixed and the user cannot change it.
IMPORTANT
Having this feature enabled does not affect the internal IF loopback
feature. But, be aware that if an external IF loopback is attempted
(connecting an external cable from the Tx IF output to the Rx IF
input), then this will NOT work! (The Tx carrier cannot turn on until
the demod is locked, and the demod cannot lock, because the TX
ouput is off. The net result is that the demod will not lock, and the
Tx carrier will not turn on. PLEASE USE THE RTI FEATURE WITH
EXTREME CARE!
(CONFIG: TX Æ PWR) MODE
OUTPUT POWER LEVEL MODE:
MANUAL AUPC (ENTER)
Select the output power level mode, either Manual or AUPC, then press ENTER.
If the user selects MANUAL, the following menu is displayed:
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