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After connecting the
network, the images of
several optical contact
points appear one or two
horizontal bright traces.
Power
supply
AC
ripple
interference because of the bad
earth of equipment or power
supply.
Check grounding situation of the equipment,
make sure that every equipment in the line
has been reliably grounding and the
grounding resistance must be
﹤
4Ω.
After connecting the
network, the received
optical power of the
optical contact point is
unstable and changes
continuously.
The
output RF signal is also
unstable.
But
the
detected optical output
power of the optical
transmitter is normal.
The optical fiber connector types
do not match, maybe the APC
type connect to PC type.
The optical fiber connector or
adapter may be polluted seriously
or the adapter has been damaged.
1. Check the type of optical fiber connector
and adopt the APC type optical fiber
connector to ensure the normal transmission
of optical signal.
2. Clean the polluted optical fiber connector
or adapter. Specific operation methods see
“Clean and maintenance method of the
optical fiber connector”.
3. Replace the damaged adapter.
9. Clean and maintenance method of the optical fiber active connector
In many times, we consider the decline of the optical power as the equipment faults, but
actually it may be caused by that the optical fiber connector was polluted by dust or dirt.
Inspect the fiber connector, component, or bulkhead with a fiberscope. If the connector is
dirty, clean it with a cleaning technique following these steps:
1.
Carefully pull off the optical fiber active connector from the adapter. The optical fiber
active connector should not aim at the human body or the naked eyes to avoid accidental
injury.
2.
Wash carefully with good quality lens wiping paper or medical degrease alcohol cotton.
If use the medical degrease alcohol cotton, still need to wait 1~2 minutes after wash, let
the connector surface dry in the air.
3.
The cleaned optical fiber active connector should be connected to optical power meter to
measure output optical power to affirm whether it has been cleaned up.
4.
When connect the cleaned optical fiber active connector back to adapter, should notice to
make the force appropriate to avoid the ceramic tube in the adapter crack.
5.
If the output optical power is not normal after cleaning, should pull off the adapter and
clean the other connector. If the optical power still low after cleaning, the adapter may be
polluted, clean it. (Note: Be carefully when pull off the adapter to avoid hurting inside
fiber.
)
6.
Use the dedicated compressed air or degrease alcohol cotton bar to clean the adapter.
When use the compressed air, the muzzle of the compressed air tank should aims at the
ceramic tube of the adapter, clean the ceramic tube with compressed air. When use
degrease alcohol cotton bar, carefully insert the alcohol cotton bar into the ceramic tube
to clean. The insert direction should be consistent, otherwise can not reach ideal cleaning
effect.
