Comtech EF Data CDD-880, Installation And Operation Manual

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CDD-880 Multi Receiver Router MN-CDD880
Appendix G Revision 2
G–13
Figure G-6. Hub Rain Fade
G.3.2.2 DPC with ACM and Hub Backoff
If hub fade is known, the transmit power is allowed to increase beyond rated maximum power
and up to backoff power, possibly preventing degraded performance by not modifying MODCOD
under ACM control.
The Figure G-7 graph depicts DPC with hub backoff:
•
As C/N decreases, output power increases until terminal maximum power or backoff limit is
achieved, clamping power change.
• Depending on the amount of fade, the MODCOD may not change.
Figure G-7. DPC w/ACM with Hub Backoff