Cisco Cisco 1 GHz GainMaker Amplifier インストールガイド
Low or Degraded Reverse RF Signal
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Low or Degraded Reverse RF Signal
The reverse RF signal can be measured at the line extender module reverse input
and reverse output test points.
and reverse output test points.
Low or Degraded Reverse RF Signal Troubleshooting Table
Before you begin troubleshooting for a low or degraded reverse RF signal, verify
that the line extender is receiving the proper reverse RF input signals from the
downstream line extender at the line extender reverse input test point.
that the line extender is receiving the proper reverse RF input signals from the
downstream line extender at the line extender reverse input test point.
Important! You cannot balance the line extender without the proper reverse RF
input signals.
input signals.
Make sure you have configured the line extender module according to the
specifications in the design print, and that the line extender has warmed up for
approximately one hour.
specifications in the design print, and that the line extender has warmed up for
approximately one hour.
Make sure you are using the proper total tilt reference when setting receive levels.
Refer to the reverse equalizer charts in Technical Information (on page 97) for more
information.
Refer to the reverse equalizer charts in Technical Information (on page 97) for more
information.
Important! If the line extender cover was ever removed, make sure it was properly
reinstalled. Improperly reinstalling the line extender module cover may result in RF
signal degradation.
reinstalled. Improperly reinstalling the line extender module cover may result in RF
signal degradation.
Possible cause
Solution
Low or degraded reverse RF signal
at the reverse input test point.
at the reverse input test point.
Verify that the line extender is receiving the
proper reverse RF input signals from the
downstream line extender.
Important! You cannot balance the line
extender without the proper reverse RF input
signals.
proper reverse RF input signals from the
downstream line extender.
Important! You cannot balance the line
extender without the proper reverse RF input
signals.