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Configuring Spectrum Management on an Upstream Cable Interface

Cisco uBR7200 Series MC16S Cable Modem Card Spectrum Management 21

Example

See the following example to conﬁgure spectrum group 1 with an upstream frequency of

6,500,000 Hz and a default power level of 0 dBmV:

Router(config)# cable spectrum-group 1 frequency 6500000

See the following example to add the upstream frequency 7,000,000 Hz to the list of valid

frequencies with a default power level of 0 dBmV for spectrum group 1:

Router(config)# cable spectrum-group 1 frequency 7000000

See the following example to conﬁgure spectrum group 2 with an upstream frequency 7,500,000 Hz

and change the power level to 5 dBmV:

Router(config)# cable spectrum-group 2 frequency 7500000 5

See the following example to conﬁgure spectrum group 3 with an upstream band of 12,000,000 to

18,000,000 Hz and default power level of 0 dBmV:

Router(config)# cable spectrum-group 3 band 12000000 18000000

See the following example to add the upstream band 20,000,000 to 24,000,000 Hz to the list of valid

bands with a change in the power level of 13 dBmV for spectrum group 3:

Router(config)# cable spectrum-group 3 band 20000000 24000000 13

See the following example to conﬁgure a continuous band between 5,000,004 and 40,000,000 Hz

for scheduled spectrum group 4 with a default power level of 0 dBmV. The spectrum group will be

available to the spectrum group starting at 12:00 p.m. local time each Monday:

Router(config)# cable spectrum-group 4 time Monday 12:00:00 band 5000004 40000000

See the following example to add the upstream frequency 9,500,000 Hz to the list of valid

frequencies and change the nominal power level to 5 dBmV. The spectrum manager adjusts

frequencies and power levels on this group at 2:00 a.m. local time each day:

Router(config)# cable spectrum-group 3 time 02:00:00 frequency 9500000 5

See the following example to conﬁgure the minimum period before which a frequency hop can occur

in seconds:

Router(config)# cable spectrum-group 3 hop period 800

See the following example to conﬁgure the threshold value (expressed as a percentage) of the

number of “ofﬂine” modems identiﬁed before the Cisco uBR7200 series initiates an automatic

frequency hop:

Router(config)# cable spectrum-group 3 hop threshold 40

See the following example to conﬁgure a particular spectrum group as a shared RF spectrum group.

Specifying a given spectrum group as “shared” tells the Cisco uBR7200 series that you want to be

sure that upstream frequencies assigned to upstream interfaces are not assigned to additional

upstream interfaces:

Router(config)# cable spectrum-group 3 shared

See the following example to remove a speciﬁed spectrum group from your conﬁguration:

Router(config)# no cable spectrum-group 3

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Cisco MC16S Bedienungsanleitung Seite 21