User's Manual

Chapter 4
PC-IP Operation
31
Figure 4-3
Digital Pilots - Digital pilots are set to the lowest and highest
digital channel. These channels are used to calculate the tilt of
the digital channels in the automated tests. To select a channel,
click on the box and select the desired channel from the pull
down window. Only active digital channels are displayed in the
pull down window. If these are not set, the Tilt and Peak-to-
Valley measurements should be disabled in the digital SMART
tests on the LIMITS screen.
Downstream Ranging Channels - Downstream Ranging
Channels carry the DOCSIS downstream data. Up to six channels
may be programmed. Select a channel by clicking on the box and
select the desired channel from the pull down window. Only
active digital channels are displayed in the pull down window.
Be sure that the channel information is properly programmed for
the DOCSIS channels. In the Cable Modem setup screen, select
a ranging method for the internal cable modem to dwell on the
first channel entered in the Downstream Ranging channel list or
select Scan for the Install Profiler to sequence through the list of
Downstream Ranging Channels (in the order listed).
Active Channel Table - The Active Channel Table is the one
that will be active when the Install Profiler is turned on. The user
of the Install Profiler may select the channel plan in the SETUP
screen of the Install Profiler from the list of downloaded channel
tables. To select the active channel table, click on the box and
select the desired channel plan from the pull down window.
Figure 4-4