15-2 Cable Modem Tools
15-2.1 Cable Modem Info
Once the CM has registered, press
CM Info
(F1) to display downstream/upstream RF signal status.
The CM registration status, signal type, and DOCSIS
standard are displayed at the top of the screen.
Downstream/upstream list parameters are displayed in
the 2 panes at the bottom of the screen. Press
DS
/
US
(F2) to toggle between downstream & upstream info
for QAM and OFDM modulation parameters.
Downstream details include frequency, signal level,
modulation mode, S/N, symbol rate, & pre/post BER.
Upstream details include channel ID, frequency, signal
level, modulation mode, and bandwidth.
Downstream QAM (left) and OFDM (right) data
Upstream QAM (left) and OFDM (right) data
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