Monitor:) Rx-Params; Monitor:) Cnc (Doubletalk® Carrier-In-Carrier®) - Comtech EF Data SLM-5650A Installation And Operation Manual

7.2.4.3

(Monitor:) Rx-Params

Fc=+05917 RSL<-60.0 dBm
Buf=000% Eb/No=Loss
This read-only screen monitors the following Rx operating parameters:
•
Fc displays the received carrier frequency offset in Hz. The range is the same as the
acquisition range of the modem (60 kHz).
•
RSL displays the signal level of the received carrier in dBm. The range supported is
(+15) to (-60) dBm.
•
BERT displays the measured BER. This requires that the modem be set to Test mode for
Rx. If a Fireberd is supplying a data pattern, only the Test mode for the Rx needs to be
turned on. The Fireberd data pattern and the modems' data patterns must match to work
properly.
•
Buf displays the buffer fill status as a percentage.
•
Eb/No displays the estimated Eb/No of the received carrier. The range is threshold to 20
dB Eb/No.
•
BER displays the estimated BER based on the demodulator's measurement of the carrier
to noise.
The difference between BERT and BER is that BERT is measured when
the Test mode is turned ON, whereas BER is estimated in the
demodulator.
Press [ENT] or [CLR] to return to the previous menu.
7.2.4.4 (Monitor:) CnC (DoubleTalk® Carrier-in-Carrier®)
CnC: Delay=000,005uS
Eb/No=Loss
This read-only screen updates once every second. If enabled and locked, this screen monitors
the CnC performance data:
•
Delay displays the current search delay value.
•
FreqOff displays the current frequency offset between the outbound interferer and the
desired inbound.
•
Eb/No displays the estimated Eb/No of the received carrier. The range is threshold to 20
dB Eb/No.
•
Ratio displays the ratio of outbound interferer power to desired inbound power. The
range is ±10 dB.
Press [ENT] or [CLR] to return to the previous menu.
Front Panel Operation
BERT=N/A
BER <1.0E-12 (E)
FreqOff=008.7kHz
Ratio<-10dB (E)
7–41
SLM-5650A Satellite Modem
Revision 10
MN-SLM-5650A