BSR 2000 Configuration and Management Guide
Release 1.0
6-56
MGBI
526360-001-00 Rev. B
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.
1.
Use the
cable upstream frequency
command in Interface Configuration mode to
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.
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.
■
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.
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.
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.
Summary of Contents for BSR 2000
Page 1: ...BSR 2000 Configuration and Management Guide 526360 001 00 Rev B Release 1 0 MGBI ...
Page 6: ... Motorola Motorola Motorola Motorola Motorola Motorola Motorola Motorola Motorola ...
Page 50: ......
Page 130: ......
Page 164: ......
Page 458: ......
Page 490: ......
Page 580: ......
Page 632: ......
Page 648: ......
Page 649: ......
Page 650: ...526360 001 00 Rev B 7 06 MGBI Visit our website at www motorola com ...