Dpc (Vms Dynamic Power Control) Operation - Comtec CDM-840 Installation And Operation Manual

CDM-840 Remote Router
Appendix A
A.7

DPC (VMS Dynamic Power Control) Operation

The DPC (Dynamic Power Control) feature, provided in Comtech EF Data's CDM‐840 and ODM‐
840 Remote Routers, provides a mechanism whereby remote satellite uplinks have their
transmit power levels adjusted in order to optimize the receive signal quality as measured by
the corresponding demodulator E
optimization process acts to either increase or decrease transmitted signal levels in order to:
•
Achieve a minimum level of received E
margin.
•
Reduce transmit power where sufficient link margin exists in order to optimize group station
uplink saturation and/or satellite transponder power usage reducing costs.
•
Increase link availability when margins apply (typically Ku‐Band or Ka‐Band).
•
Maintain proper power backoff to eliminate high power amplifier saturation and carrier
distortion.
•
Appendix M. DPC (VMS DYNAMIC POWER CONTROL) in this manual
Appendix L. DPC (VMS DYNAMIC POWER CONTROL) in the Comtech EF Data
ODM-840 Remote Router / ODMR-840 Reduced Form Factor Remote Router /
ODMR-840B Remote Router Board Set Installation and Operation Manual
(CEFD P/N MN-ODM840)
• Appendix G. DPC (VMS DYNAMIC POWER CONTROL) in the Comtech EF Data
CDD-880 Multi Receiver Router Installation and Operation Manual (CEFD P/N
MN-CDD880)
•
Appendix H. DPC (VMS DYNAMIC POWER CONTROL) in the CTOG-250 Comtech
Traffic Optimization Gateway with CDM-800 Gateway Router Installation and
Operation Manual (CEFD P/N MN-CTOG250)
/N (the ratio of energy per symbol to noise density). This
S 0
/N consistent with providing an error free link or set
S 0
A–7
MN-CDM840
Revision 3