Cisco 7246VXR - uBR Router Software Configuration Manual page 34

Cisco uBR7200 Series Router Configuration Overview
The digital carrier frequency is not the same as the video carrier frequency. For EIA channel 95, the
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video carrier frequency is 91.250 MHz which is 1.75 MHz below the center frequency.
Activating the downstream port on the cable interface line card for data transmission over the HFC
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network, using the following command:
Router (config-int)# no shutdown
The particular downstream port LED should light.
Setting the upstream frequency of your RF output to comply with the expected input frequency of
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your Cisco cable interface line card.
The valid range for a fixed upstream frequency is 5,000,000 Hz to 65,000,000 Hz for the MC16E cable
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interface line card. The valid range for all other cable interface line cards that support NTSC operations
is 5,000,000 Hz to 42,000,000 Hz.
The cable interface will not operate until you either set a fixed upstream frequency or create and
configure a spectrum group. Enter the fixed center frequency for your upstream RF carrier in Hz and
specify a port number from 0 to 5:
Router (config-int)# cable upstream port frequency up-freq-hz
Note
• Entering an upstream RF carrier frequency for each upstream port on a cable modem.
• Activating the RF carrier on each upstream port to support data from CMs or set top boxes on your
network to the Cisco uBR7200 series router. Enable upstream data traffic, using the following
command:
Router (config-int)# no cable upstream port shutdown
The specified upstream port LED lights.
Repeat the above for each upstream port to activate.
Verifying your settings using the following command:
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Router# show running-config
Saving the configuration to nonvolatile random access memory (NVRAM) so that your settings are
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retained after a power cycle:
Router# copy running start
Verifying the upstream frequency, using the show controllers cable slot/port upstream command
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for the upstream port you just configured.
Verifying the downstream center frequency, using the show controllers cable slot/port downstream
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command for the downstream port you just configured.
Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
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Make sure that the selected upstream frequency does not interfere with the frequencies used for
any other upstream applications in your cable plant.
Chapter 1 Overview of Cisco uBR7200 Series Software
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