Config: Tx) On/Off; Config: Tx) Pwr (Power) - Comtech EF Data CDM-570A Installation And Operation Manual

For the CDM-570A only: The allowable range of frequencies is from 50 to 90 MHz and from 100
to 180 MHz, in steps of 100 Hz, as this example shows (note that the modem displays leading
zeros to maintain compatibility with the L-Band firmware):
Tx IF Freq:0085.1234 MHz
6.3.2.3.7

(CONFIG: Tx) On/Off

Tx Output State: Off On
Rx-Tx Inhibit(◄ ►,ENTER)
◄ ►
Use the arrow keys to select Off, On, or Rx-Tx Inhibit. Press ENTER.
(CONFIG:Tx) Off/On Rx-Tx Inhibit
RTI-Timeout Value: 10s
7s 4s 2s 1s (◄ ►,ENTER)
◄ ►
Use the
1s. Press ENTER.
CAUTION – USE THE Rx-Tx INHIBIT FEATURE WITH EXTREME
CARE!
RTI means RECEIVE/TRANSMIT INHIBIT. When you select this feature, the
modem prevents transmission of the Tx carrier until the demodulator is
locked. To prevent the Tx Carrier from turning off when the demodulator
loses lock for a very short period of time, you must instruct the demodulator
to unlock continuously for a selected time period (10, 7, 4, 2, or 1 seconds)
before the mode inhibits the transmit carrier.
Enabling the RTI feature does not affect the internal IF loopback feature. Be
aware, however, that if you attempt an external IF loopback (by 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 locks, and the demod cannot
lock because the Tx output is off. The net result is that the demod will not lock
and the Tx carrier will not turn on.
6.3.2.3.8

(CONFIG: Tx) Pwr (Power)

Output Power Level Mode:
Manual
◄ ►
Use the arrow keys to set the output power level mode. Press ENTER.
(CONFIG: Tx) Output Power Level Mode: Manual
Tx Output Power Level:
-03.9 dBm (◄ ►,▲ ▼ ENT)
Front Panel Operation
CDM-570A/570AL Satellite Modem with Optional Packet Processor
(◄ ►,▲ ▼,ENT)
arrow keys to select the RTI Timeout value (in seconds) as 10s, 7s, 4s, 2s, or
AUPC CnC-APC
6–23
Revision 5
MN-CDM570A