Comtech EF Data CDM-840 - Manual (Page 98)

CDM-840 Remote Router Revision 2
Ethernet-based Remote Product Management MN-CDM840
6–30
6.4.4.5.2.1.2 Configuration | WAN | Demod | ACM (Adaptive Coding and
Modulation)
VersaFEC ACM requires Version 1.3.2 (or higher) firmware, and the appropriate
FAST code for the maximum operating symbol rate.
Use this page to configure CDM-840 Rx ACM operations.
Outbound ACM allows you to configure a CTOG-250 Comtech Traffic Optimization Gateway to
dynamically adjust the DVB-S2 MODCODs that are sent to each CDM-840 Remote Router, based
on the conditions at that remote site. These conditions include antenna size, look angle and
satellite band, as well as the current environmental conditions. Each CDM-840 will automatically
and periodically send its Rx Es/No to the associated CTOG-250.
Figure 6-14. Configuration | WAN | Demod | ACM Page
Requirements for ACM operation are as follows:
• Outbound ACM must be enabled at the CTOG-250.
• When Outbound ACM is disabled at the CTOG-250, all packets will revert to the “VCM
Only MODCOD” which is configured in each QoS Group.
• Each CDM-840 must be locked to the Shared Outbound carrier from the CTOG-250.