Setting The Upstream Frequency; Setting The Upstream Power Level - Motorola BSR 2000 Configuration And Management Manual

BSR 2000 Configuration and Management Guide

Setting the Upstream Frequency

The cable interface does not operate until a fixed upstream frequency is set. The RF
upstream frequency must comply with the expected CM output frequency.
Note: Make sure that the upstream frequency selected does not interfere
with the frequencies used for any other upstream applications running in the
cable plant.
1. Use the cable upstream frequency command in Interface Configuration mode to
Note: Upstream frequency ranges are different depending on your regional
implementation of DOCSIS or Euro-DOCSIS. The frequency ranges that
appear in the CLI help are related to your implementation of DOCSIS. The
upstream frequency value for Euro-DOCSIS is 5000000 to 65000000 Hz.

Setting the Upstream Power Level

The cable interface controls CM output power levels to meet the desired upstream
port input power level. Input power level adjustments to an upstream port compensate
for cable interface signal degradation between the optical receiver and the upstream
RF port. You can configure the upstream input power level in either absolute or
relative mode.
6-56
set the upstream frequency for an upstream port:
MOT(config-if)#cable upstream <NUM> frequency
<5000000-42000000>
where:
NUM is the upstream port number.
5000000-42000000 is the upstream frequency value in Hertz (Hz) for
DOCSIS.
If the upstream input power level is set to the absolute mode, the input power
level does not change when the upstream channel width is changed. Defining the
input power level in absolute mode could possibly cause upstream return lasers to
clip on a completely populated upstream channel.
MGBI
Release 1.0
526360-001-00 Rev. B