Cisco Model GS7000 4-Port Node 1 GHz with 42 54 Split Guida All'Installazione
![Cisco](https://files.manualsbrain.com/attachments/7380d0050044647c30f5c24bbbf5d0c0b6d9bb84/common/fit/150/50/faa183d287233c52228cfea3dbc2a127fe780f60564fcb0955d9c3d1cd23/brand_logo.png)
Appendix B
Enhanced Digital Return Multiplexing Applications
Enhanced Digital Return Multiplexing Applications
134
Orange
(Blink)
(Blink)
Orange
(Blink)
(Blink)
Non-Cisco Standard OPM
Module is in use.
Input Level Overdrive.
Module is in use.
Input Level Overdrive.
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.
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.
Follow the steps in the table below to troubleshoot the transmitter module.
Symptom
Possible Cause
Possible Solutions
No optical signal output
Laser temperature could be
too high or low.
too high or low.
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.
power is ON for the
temperature to stabilize.
If still no output, contact the
Cisco Technical Service Center
for assistance.
Laser could be faulty.
Contact the Cisco Technical
Service Center for assistance.
Service Center for assistance.
Automatic power control
circuit failure.
circuit failure.
Contact the Cisco Technical
Service Center for assistance.
Service Center for assistance.
Damaged fiber.
Contact the Cisco Technical
Service Center for assistance.
Service Center for assistance.
Symptom
Possible Cause
Possible Solutions
No optical signal output
(cont'd)
(cont'd)
One or more power supply
voltages are out of
specification.
voltages are out of
specification.
Check the power supply for
proper operation.
proper operation.
No AC at receptacle.
Check the receptacle for AC
power.
power.
Blown fuse on the power
supply.
supply.
Check the power supply fuse
and replace as necessary.
and replace as necessary.