Comtech EF Data CDD-880, Инструкция по установке и эксплуатации

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CDD-880 Multi Channel Receiver MN-CDD880
Appendix A Revision 2
A–3
A.3 VersaFEC ACM (Adaptive Coding and Modulation) Operation
The VersaFEC® Adaptive Coding and Modulation (ACM) feature is a patents‐pending technology
owned and developed by Comtech EF Data and Comtech AHA Enterprise Products Group.
ACM allows modulation and code rate (MODCOD) to change on a frame‐by‐frame basis subject
to current link conditions. As ACM converts available link margin into increased capacity,
average capacity gain of 100% or more is possible. This maximizes each remote’s throughput
under all conditions which, in turn, maximizes network efficiency and availability. ACM
maximizes throughput regardless of link conditions (noise or other impairments, clear sky, rain
fade, etc).
Return Link (Inbound) ACM operation is available in the CDD‐880 Multi Receiver Routers and in
the CDM‐840 and ODM‐840 Remote Routers. Outbound ACM operation is available in the
CDM‐800 Gateway Router via the CTOG‐250 Comtech Traffic Optimization Gateway.
•
Appendix H. V
ERSA
FEC RETURN LINK ACM (ADAPTIVE CODING
AND
MODULATION)
in this manual.
• Appendix D. V
ERSA
FEC RETURN LINK ACM (ADAPTIVE CODING
AND
MODULATION)
in the Comtech EF Data CDM-840 Remote Router Installation and Operation
Manual (CEFD P/N MN-CDM840)
• Appendix D. V
ERSA
FEC RETURN LINK ACM (ADAPTIVE CODING
AND
MODULATION)
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 E. OUTBOUND ACM (ADAPTIVE CODING
AND
MODULATION) in the
CTOG-250 Comtech Traffic Optimization Gateway with CDM-800 Gateway Router
Installation and Operation Manual (CEFD P/N MN-CTOG250)