System information

BSR 64000 Configuration and Management Guide
6-24
Setting the Upstream Power Level in Absolute Mode
Issue the cable upstream power-level command in Interface Configuration mode to
set the upstream input power level in absolute mode, as shown below:
MOT(config-if)#cable upstream <NUM> power-level <power>
where:
NUM is the upstream port number.
power is the input power level, expressed in dB.
Example
Issue the cable upstream power-level command in Interface Configuration mode to
set the upstream input power level to +5 dBmV in absolute mode, which keeps the
input power level at +5 dBmV regardless of the upstream channel bandwidth setting,
as shown below:
MOT(config-if)#cable upstream 0 power-level 50
Applying an Upstream Modulation Profile
Modulation profile 1 and 2 are the default upstream modulation profiles containing
upstream burst parameters. Modulation profile numbers 1 or 2 can be applied to an
upstream port, or other upstream modulation profiles that currently exist for the cable
interface. Follow the steps in this section to apply a modulation profile to an upstream
port:
1. To view all existing modulation profiles, use the show cable modulation-profile
command in Privileged EXEC mode, as shown below:
MOT#show cable modulation-profile
2. To view a specific modulation profile, use the show cable modulation-profile
command in Privilege EXEC mode, as shown below:
Caution: Use caution when increasing the input power level in absolute
mode. The CMs on the HFC network increase their transmit power level by 3
dB for every incremental upstream channel bandwidth change, causing an
increase in the total power on the upstream channel. This may violate the
upstream return laser design parameters