User Manual

135
MN024-08
to the TFAx side, disconnect the optical SC-APC connector from TFAx UL
port and measure the input power P
IN
(UL) coming out of the TFAx UL
port.
5. Calculate the UL fibre attenuation A
UL
as: A
UL
[dB] = P
IN
(UL) – P
OUT
(UL)
a. If A
UL
> 4dB, the fibre optic cable has some problems or cable
path is too long. Replace it.
b. If A
UL
< 4dB, then TFAx remote unit should be faulty. Before
replacing it, check the TFAx status on supervision system and
contact for assistance
TFLN