Motorola BSR 2000, Руководство по настройке и управлению

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Release 1.0 Configuring the CMTS
526360-001-00 Rev. B MGBI 6-143
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:
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:
MOT(config-spcgrp:
<
WORD
>
)#
collect interval <
60-65535
>
where:
WORD
is the spectrum group name.
60-65535
is the time interval expressed in seconds.
For example, the following syntax shows that the spectrum manager’s data
collection interval rate for scanning the spectrum map occurs once every hour:
MOT(config-spcgrp:spectrum1)#
collect interval 3600
■
Since the spectrum collection feature uses resources on the upstream channel that
may affect throughput for CMs associated with the upstream port, the spectrum
data collection feature should be turned off when it is no longer in use to conserve
network resources.
•
Use the no collect interval command to disable the collection interval.
•
Use the no collect resolution command to disable the frequency resolution.
Configuring Spectrum Hopping Rules
Rules for spectrum hopping must be defined before the spectrum hopping function is
used. Spectrum hopping rules are searched before spectrum hopping occurs on an
upstream port when the spectrum group is triggered. Spectrum hopping rules are used
by the spectrum manager to find the best way to defeat noise problems on an upstream
port.