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CDM-Qx Satellite Modem
Front Panel Operation
Selecting BERT-Mon displays:
BERT Monitor: Errs=0000253
If BERT monitor is turned ON, results are being displayed in bit errors and average BER.
If it displays BER=SyncLoss that means there was a loss of pattern synchronization. If it
displays BER=No Sync, that means pattern synchronization is not achieved. When the
BERT monitor is sync, the BER displays a value (e.g. BER=8.5E-07).
Selecting BERT-Control displays:
BERT Control: 10E-3Err=OFF
Restart=NO
The 10E-3Err control resides at the Tx. This generates an average BER=1.0E-03 once
monitored at the Rx side. The Restart control is to reset the BERT monitor (Rx side) for
a fresh start of BER measurement. The SyncThres control is the synchronization loss
threshold as defined:
•
Spec-Analyzer Submenu
Selecting Spec-Analyzer displays:
Spectrum Analyzer:
Mode Config
Selecting Mode displays:
Spectrum Analyzer Mode:
Off
This menu allows the user to turn ON or OFF the engine of the spectrum analyzer. If
spectrum analyzer mode is ON, the user can use Comtech's application software
(Windows) to view the spectrum, or use the Web browser.
Selecting Config displays:
Config Spectrum Analyzer:
CenterFreq
Selecting Center Freq displays:
Spectrum Analyzer: (◄ ►,▲▼,ENT)
Center Freq = 0070.0000 MHz
BER=8.5E-07
SyncThres=>256
a. >256 = 256 bit errors counted in less than 1000 bits o data
b. low = 100 bit errors in less than 1000 bits of data
c. med = 250 bit errors in less than 1000 bits of data
d. high = 20,000 bit errors in less than 100,000 bits of data
On
Span
(◄ ►, ENT)
(◄ ►, ENT)
(◄ ►, ENT)
5–53
Revision 6
MN/CDMQx.IOM
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