Comtech EF Data CDM-570A - Manual (Page 504)

CDM-570A/570AL Satellite Modem with Optional Packet Processor MN-CDM570A
Appendix E Revision 2
E–2
3. Set the nominal output power of the modem: Use the SELECT: Config  Tx  Pwr (Power)
menu to select MANUAL mode, and then edit the displayed Tx output power level.
4. Select AUPC as the operating mode. At this point, you are prompted to define four key
parameters: Target-Eb/No, Max-Range, Alarm, and DemodUnlock.
E.2.1 Target-Eb/No
Set the Eb/No values that you need to keep constant at the remote modem. Do these steps:
1. Enter a minimum value of 0.0 dB. If the Eb/No falls below this value, the AUPC control will
increase the Tx output power, but will never exceed the value determined by the parameter
Max-Range.
2. Enter a maximum value of 14.9 dB. If the Eb/No exceeds this value, the AUPC control will
reduce the Tx output power, but will never drop below the nominal value set.
• The default value is 3.0 dB.
• The resolution is 0.1 dB.
E.2.2 Max-Range
Set how much the modem is permitted to increase the output level, under AUPC control. Do
these steps:
1. Enter a minimum value of 0 dB.
2. Enter a maximum value of 9 dB.
• The default value is 1 dB.
• The resolution is 1 dB.
E.2.3 Alarm
Set the modem behavior when the maximum power limit is reached while under AUPC control.
The two choices are:
• None (no action) – default setting.
• TxALARM (generate a Tx alarm).