Comtech EF Data CDM-625A, Installation And Operation Manual

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CDM-625A Advanced Satellite Modem MN-CDM625A
Appendix C Revision 4
C–4
C.4 Monitoring
CAUTION – Comtech EF Data strongly cautions against the use of large values of
permitted power level increase under AUPC control. Users should consider using the
absolute minimum range necessary to improve rain-fade margin.
The remote demodulator’s value of Eb/No can be monitored at all times, either from the front
panel ( SELECT: Monitor

AUPC ) or via the remote control interface. The resolution of the
reading is 0.2 dB. For all values greater than or equal to 16 dB, a value of 16.0 dB will be
displayed. As long as framing is enabled, the value will still be available, even though AUPC may
be disabled.
The current value of Tx power increase is also displayed. If EDMAC framing is enabled but AUPC
is disabled, this will indicate 0.0 dB. This value is also available via the remote control interface.
If IP-ACM mode is selected, then distant-end Eb/No monitoring is done through the
ACM monitor functions. In the IP-ACM case, the displayed resolution is 0.1 dB.