Diff. Decoder; Rf Loop Back - Comtech EF Data SNM-1001L Installation And Operation Manual

SNM-1001L Satellite Modem
Front Panel Operation
FUNCTION SELECT:CONFIGURATION:DEMODULATOR:
DESCRAMBLER
Programs the descrambler On or Off.
Upon entry, the current status of the descrambler is displayed. Press [↑] or [↓] to make the
selection. Press <ENTER> to execute the change.
FUNCTION SELECT:CONFIGURATION:DEMODULATOR:

DIFF. DECODER

Programs the differential decoder On or Off.
Upon entry, the current status of the differential decoder is displayed. Press [↑] or [↓] to make the
selection. Press <ENTER> to execute the change.
IMPORTANT
Programs the modem for RF loopback operation. When RF loopback is turned on, the
demodulator is programmed to the same frequency as the modulator. When RF loopback is turned
off, the demodulator is tuned to the previous frequency. Refer to (Figure 4-4) for a block diagram
of RF loopback operation.
DESCRAMBLER
DIFF. DECODER
FUNCTION SELECT: CONFIGURATION: DEMODULATOR:

RF LOOP BACK

RF LOOP BACK
This is a Test Mode.
ON
ON
OFF
4–20
Revision 1
MN/SNM1001L.IOM