System information

Configuring the CMTS
6-93
[07/23-11:07:28:SPECMGR]-D-Channel Noise Power (1/10 dbmv) :
-32.
In the following output example, ingress noise causes the error rate to exceed the error
threshold, and the next hop action changes the upstream channel width:
[07/23-11:08:58:SPECMGR]-D-Monitor Channel IfIndex = 7 :
[07/23-11:08:58:SPECMGR]-D-Error Rate: 4.5083 %, ErrorWord :
182, TotalWord : 4037
[07/23-11:08:58:SPECMGR]-D-Channel Noise Power (1/10 dbmv) : 16.
The following output displays that the hop action succeeded and that a new channel
width has been assigned to the upstream port by the spectrum manager:
[07/23-11:08:59:SPECMGR]-N-Set to new width 1600000, miniSlot 8
for channel ifIndex = 7 .
[07/23-11:09:08:SPECMGR]-D-Monitor Channel IfIndex = 7 :
[07/23-11:09:08:SPECMGR]-D-Error Rate: 0.5769 %, ErrorWord : 17,
TotalWord : 2947
[07/23-11:09:08:SPECMGR]-D-Channel Noise Power (1/10 dbmv) : 16.
The following output displays that the noise power level is restored:
[07/23-11:09:18:SPECMGR]-D-Monitor Channel IfIndex = 7 :
[07/23-11:09:18:SPECMGR]-D-Error Rate: 0.0000 %, ErrorWord : 0,
TotalWord : 3040
[07/23-11:09:18:SPECMGR]-D-Channel Noise Power (1/10 dbmv) :
-183.
Viewing the Spectrum Management Roll-back Function
When the spectrum roll-back function is enabled, the spectrum manager returns the
upstream channel width or modulation profile setting, that was adjusted during a hop
action, to the original configuration when upstream channel conditions improve.
In the following output example, the roll-back function starts when the ingress noise
is removed:
[07/23-11:09:28:SPECMGR]-D-Monitor Channel IfIndex = 7 :
[07/23-11:09:28:SPECMGR]-D-Error Rate: 0.0000 %, ErrorWord : 0,
TotalWord : 2809
[07/23-11:09:28:SPECMGR]-D-Channel Noise Power (1/10 dbmv) :
-184.
[07/23-11:09:38:SPECMGR]-D-Monitor Channel IfIndex = 7 :
[07/23-11:09:38:SPECMGR]-D-Error Rate: 0.0000 %, ErrorWord : 0,
TotalWord : 2143