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Spectrum Management Overview

12.0(7)XR2

Speciﬁes the spectrum group number. (The valid range is 1 to 32.)

If the time parameter is present, then the frequency setting or band is made available or is deleted at

the speciﬁed time.

delete (Optional)

Speciﬁes that the frequency setting or band should be removed from use at the speciﬁed time.

frequency

Speciﬁes that a center frequency setting should be a unit of allocated spectrum in this spectrum

group.

Note A channel width of 3.2 MHz is assumed for allocation purposes. For example, if the center

frequency is conﬁgured as 20.0 MHz, then the band 18.4 to 21 MHz; 6 MHz will be added to the

allocated spectrum. This applies even if the conﬁgured channel width is smaller.

ctr-freq-hz

Upstream center frequency. Valid range is 5,000,000 to 42,000,000 Hz (5 to 42 MHz) depending on

the cable modem card used. Half of the upstream carrier energy is distributed below and the other

half above this point.

band

Speciﬁes that a continuous band setting should be a unit of allocated spectrum in this spectrum

group.

start-free-hz

Speciﬁes the lower boundary of a frequency band.

end-freq-hz

Speciﬁes the upper boundary of a frequency band.

power-level-dBmV

Speciﬁes the nominal input power level. (The valid range is -10 to +25 dBmV.)

Note Some cable plants may wish to change only the input power level and not frequency on a daily

time schedule.

no cable spectrum-group

groupnum

Speciﬁes that a given spectrum group should be deleted.

Note Member upstream ports may transition to the “down” state since there is no spectrum to

assign. Reconﬁgure more bands or move the upstream ports to another spectrum group to bring them

back up.

[no] cable spectrum-group

shared

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Cisco MC16S Manual de usuario Pagina 10