Monitoring - Comtech EF Data CDM-625 Installation And Operation Manual

Advanced satellite modem (18 kbps – 25 mbps)

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CDM-625 Advanced Satellite Modem

Automatic Uplink Power Control (AUPC)

Monitoring

Comtech F 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.