Cisco GS7000 Installation And Operation Manual page 152

Appendix B
Enhanced Digital Return Multiplexing Applications
Orange
(Blink)
Follow the steps in the table below to troubleshoot the transmitter module.
Symptom
No optical signal output
Symptom
No optical signal output
(cont'd)
134
Orange
Non-Cisco Standard OPM
(Blink)
Module is in use.
Input Level Overdrive.
Possible Cause
Laser temperature could be
too high or low.
Laser could be faulty.
Automatic power control
circuit failure.
Damaged fiber.
Possible Cause
One or more power supply
voltages are out of
specification.
No AC at receptacle.
Blown fuse on the power
supply.
Verify the input level of RF port 1.
The output level overdrive
indicates the output signal level
exceeds the limit of 35 dBmV.
Verify the input level of RF port 1.
The output level overdrive
indicates the output signal level
exceeds the limit of 35 dBmV.
Cisco Standard OPM Module is
highly recommended for better
system performance and stability.
See the data sheet of the node for
ordering information.
Possible Solutions
Allow up to one minute after
power is ON for the
temperature to stabilize.
If still no output, contact the
Cisco Technical Service Center
for assistance.
Contact the Cisco Technical
Service Center for assistance.
Contact the Cisco Technical
Service Center for assistance.
Contact the Cisco Technical
Service Center for assistance.
Possible Solutions
Check the power supply for
proper operation.
Check the receptacle for AC
power.
Check the power supply fuse
and replace as necessary.