Arris C4C - Maximum Power Level for Included Channels

Chapter 8: Downstream Cable Access Modules (DCAMs)
STANDARD Revision 1.0 C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved. 239
Note: The spectrum window for both Annex A and Annex B is based on a hardware limitation: the RF circuitry contains a
bandpass filter which limits how far the channels on a given F-connector can be spread.
QAM Output Power
The XD CAM with 32 downstreams will support up to 52 dBmV for four QAM channels per F-connector and up to 49 dBmV
for eight QAM channels per F-connector. If the power is changed on one channel, it will change the power on all channels
on that F-connector.
The C4/C4c CMTS enforces the DRFI maximum power level for the number of included channels on an F-connector.
The table below shows the ranges which will be enforced.
Table 28. Maximum Power Level for Included Channels
Included
Channels
DRFI Required
Power Range
(dBmV)
Default
Power
(dBmV)
CLI Power Range (dBmV)
1
52-60
49
41-60
2
48-56
49
41-56
3
46-54
49
41-54
4
44-52
49
41-52
5
43-51
49
41-51
6
42-50
49
41-50 (51) (see note below)
7
41-49
49
41-49 (51) (see note below)
8
41-49
49
41-49 (51) (see note below)
Note: The upper limit of 51 dBmV is allowed on Annex A XD CAMs when enhanced
power is enabled.