Configuring The Downstream Frequency And Modulation Rate - Motorola BSR 2000 Configuration And Management Manual

BSR 2000 Configuration and Management Guide

Configuring the Downstream Frequency and Modulation Rate

Follow the steps in this section to configure the downstream center frequency and
modulation rate:
1. Use the cable downstream frequency command in Interface Configuration
Note: The digital carrier frequency cannot be the same as the video carrier
frequency.
2. Use the cable downstream modulation command in Interface Configuration
6-46
Enforcing the Downstream Rate Limit
Enabling the Downstream Port
Entering a Description of the Downstream Port
mode to enter the fixed center frequency for the downstream channel:
MOT(config-if)#cable downstream 0 frequency {<91000000 -
857000000>}
where:
91000000 - 857000000 is the downstream frequency in Hertz.
mode to set the downstream digital to analog signal modulation rate:
MOT (config-if)# cable downstream 0 modulation [64 | 256]
where:
64 is 6 bits per downstream symbol Quadrature Amplitude Modulation
(QAM).
256 is 8 bits per downstream symbol Quadrature Amplitude Modulation
(QAM).
Use the no cable downstream modulation command in Interface Configuration
mode to restore the default:
MOT (config-if)# no cable downstream 0 modulation [64 | 256]
MGBI
Release 1.0
526360-001-00 Rev. B