Comtech EF Data CDM-625 - Manual (Page 170)

CDM-625 Advanced Satellite Modem Revision 15
Front Panel Operation MN-CDM625
5–70
Note that, when CnC-APC is disabled, this menu is inaccessible and displays the following
message:
CnC-APC is disabled.
()
5.2.2.4 SELECT: TEST  Uncorrected-BER
Uncorrected BER < 5.0E-6
In order for a valid test run, you must first configure the modem with Viterbi, VersaFEC CCM, or
ULL (Ultra Low Latency) FEC. If the modem is not configured with the required FEC, this screen
displays “N/A” in the place of a proper test value on the top line, and a configuration advisory
follows on the bottom line:
Uncorrected BER=N/A
Requires Viterbi, VersaFEC CCM or ULL()
• Sect. 5.2.1.3.4 CONFIG: Tx  FEC
• Sect. 5.2.1.4.3 CONFIG: Rx  FEC
Additionally, if the demodulator is in unlocked state, this menu is inaccessible and displays the
following message:
Demodulator is unlocked