System information

Configuring the CMTS
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The spectrum data collection task is split between the spectrum manager and the
spectrum agent. The spectrum manager schedules the data collection with the
spectrum agent, and provides data storage for the collected data, while the spectrum
agent performs the actual data collection and sends the collected data to the spectrum
manager.
Follow these options to change the default spectrum data collection parameters used
by the spectrum manager:
• The default resolution is 200000 Hertz (Hz). Use the collect resolution command
in Cable Spectrum Group mode to change the frequency resolution rate that the
spectrum manager performs, as shown below:
MOT(config-spcgrp:<WORD>)#collect resolution <200000-4000000>
where:
WORD is the spectrum group name.
200000-4000000 is the resolution in Hz.
• The default collection interval is 0, which indicates that no collection interval is
defined. Use the collect interval command in Cable Spectrum Group mode to
configure the interval rate at which data collection is performed by the spectrum
manager while it scans the entire spectrum map from 5 MHz to 42 MHz, as
shown below:
MOT(config-spcgrp:<WORD>)#collect interval <60-65535>
where:
WORD is the spectrum group name.
60-65535 is the time interval expressed in seconds.
Note: Spectrum data is not collected for an upstream channel until the
correct collection interval is configured for the spectrum group, and the
spectrum group is applied to the upstream port.