User Manual

191
MN024-08
RF jumper. If the RF connection proves to be ok and the red LED keep on switching on, please
contact the manufacturer.
TMRX-200 module troubleshooting
Ordinary troubleshooting procedures which can be carried out on TMRX-200 module first involve
a check of the optical adapter status and of the fiberoptics cable. If the alarm status still persists, a
reboot of both the TMRX-200 module and of the TSRX-2xx/8 module can be performed so as to
re-inizialize the link.
Quick TMRX-200 troubleshooting procedure
(The following procedure is summarized by the flow-chart in fig. 5.34a)
In case the red LED is ON, please follow these steps:
1. Clean the optical adapter
2. If the problem still persists, refer to the TMRX/TSRX fiber optic troubleshooting so as to
check if the optical cable or optical connection has any problem on DL path
3. If previous actions didn’t make the LED switch off, a reboot of both the TMRX-200 module
and of the TSRX-2xx/8 module (on the slave-side) could be performed so as to re-inizialize
the link.
4. If the red LED still remains on, please check the alarm status by the LMT or the
supervision unit in order to better understand the problem and its possible solution.
TMRX/TSRX fiber optic troubleshooting
(The following procedure is summarized by the flow-chart in fig. 5.34b)
1. Check if there is any point where fibre experiences a short radius of
curvature. In this case, rearrange the optical path in order to avoid sharp
bends (if necessary, replace the optical cable with a longer one). If TMRX
(TSRX) red LED switches off, troubleshooting has been successfully
carried out. Otherwise, follow next steps.
2. Check if SC-APC connectors are properly installed at both fibre ends. In
case they are not, fix more firmly the SC-SPC connectors to their
adapters. If the TMRX (TSRX) red LED switches off, troubleshooting has
been successful. Otherwise, follow next steps.
3. Disconnect the optical fibre and clean it better at both ends, then clean
also the relevant SC-APC adapters. Re-connect the fibre to relevant ports
after cleaning. If it doesn’t make TMRX (TSRX) red LED switch off, follow
next steps.
4. Disconnect the fiber from the TMRX (TSRX) port, and measure the power
Pout which comes out from the fiber. Then, go to the module where the
other end of the fiber is connected (it can be either on the slave side and
on the master side, depending on the fiber or on the jumper you are
verifying), disconnect it and measure the input power Pin coming out of
the port. Calculate the fibre attenuation A due to the fiberoptics cable: Af
[dB] = Pin – Pout
a. If ADL > 10 dB, then the fibre optic cable has some problems. Replace it with a new one.
b. If ADL < 10 dB troubleshooting procedure has not identified the problem. Refer to
supervision system or contact the manufacturer for assistance.
TILx-
-HL