Cisco GS7000 Manuel de dépannage - Page 2
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forward local injection module
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No RF Output at Receiver RF Test Point: Optical Power LED on Receiver Module is off
These notes apply to the previous troubleshooting flowchart.
Note
1
2
Troubleshooting
2
Description
For standard receiver
This unit will have no RF output.
The receiver will not function below this DC
level which is equal to -10 dBm.
• The optimum light level input is -6 to 2
dBm.
• For every 1 dBm change in optical input
power, the RF output will change by 2 dB.
• Excessively high light input levels (> +2
dBm) will cause distortions and/or damage
the photo diode.
For low input receiver
This unit will have no RF output.
The receiver will not function below this DC
level which is equal to -10 dBm.
• The optimum light level input is -10 to -2
dBm.
• For every 1 dBm change in optical input
power, the RF output will change by 2 dB.
• Excessively high light input levels (> -2
dBm) will cause distortions and/or damage
the photo diode.
Troubleshooting