Motorola BSR 2000, Руководство по настройке и управлению

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Release 1.0 Configuring the CMTS
526360-001-00 Rev. B MGBI 6-147
where:
WORD
is the spectrum group name.
200-3200
is the input power level, expressed in dB.
default
-150 - +150
> is the number of dB above or below the default input
power level. Refer to Table 6-17 for more information on this setting.
1-255
is the priority number of the upstream power level hop action. When
no priority is assigned, the default priority is 128.
Table 6-17 describes the input power level parameters expressed in dB:
Configuring the Spectrum Hopping Error Threshold
A frequency hopping error threshold is configured as a criteria to apply the hopping
rules in instances when an unacceptable error rate occurs, which is caused possibly by
the poor signal quality of channel.
The hopping threshold error rate is determined by the Forward Error Correction
(FEC) error-rate threshold value. If the error-rate threshold is configured, the
spectrum manager periodically polls the signal quality table of the member channels
to compute the error rate during the polling interval. If the error rate exceeds the
threshold, it triggers spectrum hopping for the affected channel. The error rate is a
fraction of 1000.
The default hopping threshold error rate is 10 or 1 percent. Use the hop threshold
error command in Cable Spectrum Group mode to adjust the acceptable hopping
threshold error rate:
MOT(config-spcgrp:
<
WORD
>
)#
hop threshold error {<
1-1000
>}
where:
Table 6-17 Relative Input Power Levels
Power Range Upstream Channel Width
-160 to +140 dB 200 kHz
-130 to +170 dB 400 kHz
-100 to +200 dB 800 kHz
-70 to +230 dB 1600 kHz
-40 to +260 dB 3200 kHz