Cisco GainMaker Optoelectronic Node 1GHz with 65 86 MHz Split Installation Guide
Chapter 4 Troubleshooting
Possible cause
Suggestion
Excessive noise in return.
Check fiber connections and clean if necessary.
Check noise level at transmitter test point.
Individual ports can be isolated and return
levels can be lowered by inserting higher value
pads in the input pad socket.
Sweep at test point exhibits standing
waves.
Place 10 dB in-line pad in line with test
instrument.
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