Setting The Integrated Upconverter - Cisco 7246VXR - uBR Router Software Configuration Manual

Configuring the Downstream Cable Modem Interface
Command
Step 3
Router(config)# interface cable5/0
Router(config-if)#
Step 4
Router(config-if)# cable downstream if-output
Router(config-if)# no cable downstream if-output
Step 5
Router(config-if)# no shutdown
Step 6
Router(config-if)# end
Router#
%SYS-5-CONFIG_I: Configured from console by
console
Verifying the Downstream Ports
To determine if the downstream carrier is active (up), enter the show controllers cable command for the
downstream port that you just configured. For National Television Standards Committee (NTSC) 6 MHz
operations, see the following example:
Router# show controllers cable5/0 downstream
Cable5/0 Downstream is up
Frequency=96000000, Channel Width 6 MHz, 64-QAM, Symbol Rate 5.056941 Msps
FEC ITU-T J.83 Annex B, R/S Interleave I=32, J=4

Setting the Integrated Upconverter

The Cisco uBR7200 series router supports an integrated upconverter that outputs a DOCSIS RF signal
on the DS0 RF downstream port. To enable the integrated upconverter, you must do the following:
•
Note The cable downstream frequency command has no effect on external upconverters. If you are using an
external upconverter, this command is informational only and you must configure the external
upconverter separately, using its own command procedures.
•
•
Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
3-4
Set the downstream frequency—The integrated upconverter must be configured for the digital
carrier frequency, which is the center frequency of the downstream RF carrier (the channel) for the
downstream port. The cable downstream frequency command configures the downstream center
frequency for the integrated upconverter.
Enable the integrated upconverter—The integrated upconverter is disabled by default and must be
enabled with the no cable downstream rf-shutdown command.
Enable the cable interface—The cable interface on the Cisco uBR7200 series router must be enabled
before the integrated upconverter will output an RF signal.
Chapter 3 Configuring Cable Modem Interface Features
Purpose
Enters cable interface configuration mode.
In this example, the interface is downstream port 0 on the
cable interface card installed in slot 1 of the
Cisco uBR7200 series CMTS.
Default. Activates downstream digital data from the
Cisco uBR7200 series router.
Deactivates downstream digital data. This command mutes
the IF output of the cable interface card and shuts down the
interfaces.
Places the downstream port in the "admin up" state.
Returns to privileged EXEC mode.
This message is normal and does not indicate an error.
OL-2239-03