Andrew ION-B Series User Manual page 61

start
Are SC-APC
connectors properly
installed at both fiber
ends?
Yes
Disconnect the
optical fiber and
clean it at both ends.
Disconnect the optical
SC-APC connector from
the remote unit DL port.
Measure the output
power at the corre-
sponding fiber ends.
Calculate the fiber DL attenuation:
A [dB]=input power - output power
DL
Yes
Is A >4dB?
DL
No
Figure 3.3.14 (c): Flow-chart describing the quick troubleshooting procedure of a TFAx Case B
MN024-010
Is any dry contact
connected to some
external equipment?
Fix better the
SC-APC
No
connectors.
Is the red LED
Yes
upon the TFAx
still ON??
Clean the optical SC-APC
ports on both the TFLN
and the remote unit.
Go to the
TFLN side
Fiber optic cable has
some problems.
Please replace it
The troubleshooting procedure has not identi-
fied the problem. Use the supervision system or
contact assistance
Rearrange the optical
path to avoid sharp
bends. If necessary,
No
replace the optical cable
Yes
Yes
No
External equipment
connected to this dry
contact port should
be faulty. Test it.
Yes
Is this dry-contact
electrically closed?
Disconnect the optical
SC-APC connectors from
the TFLN DL ports
Measure the input
power coming out
of the TFLN DL port
with a longer one
Is the red LED
No
upon the TFAx
still ON??
No
end
TFAM
Case B
61