System information

Configuring the CMTS
6-73
Follow these steps to configure spectrum hopping rules:
1. The default hop period is 300 seconds. Use the hop period command in Cable
Spectrum Group mode to prevent excessive frequency hops on an upstream port,
as shown below:
MOT(config-spcgrp:<WORD>)#hop period <num:30-3600>
where:
WORD is the spectrum group name.
num:30-3600 is the rate at which the frequency hop takes place, expressed in
seconds.
2. Use the hop action frequency command in Cable Spectrum Group mode to
determine the frequency hop for discrete center frequencies during the frequency
hop action, as shown below:
MOT(config-spcgrp:<WORD>)#hop action frequency <center frequency>
[priority <n>]
where:
WORD is the spectrum group name.
center frequency is the upstream frequency from 5000000 to 42000000 Hz
1-255 is the priority number of the upstream frequency hop action. When no
priority is assigned, the default priority is 128. The lower number takes
precedence.
For example, the following syntax determines that 28 MHz replaces the existing
upstream frequency when a hop action is triggered and defines the priority level
of the hop:
MOT(config-spcgrp:spectrum1)#hop action frequency 28000000 priority
30