Troubleshooting; Troubleshooting Procedure - Cailabs Aroona Star Instruction Manual

6. Troubleshooting

1. Troubleshooting procedure

If the system shows abnormal losses or if data transmission
performance degrades or if the link transmission performance
test fails, follow the procedure below:
1. Make sure the correct transceiver/fiber connections have
been made: one site's Tx transceiver port must be linked
to the other site's Rx transceiver port. In addition, the
transceiver monitoring tools make it possible to check the
transmission powers Tx and reception Rx and therefore
check the link budgets as well.
2. Make sure the correct transceiver/fiber connections have
been made: one site's Tx transceiver port must be linked to
the other site's Rx transceiver port.
3. Ensure that there is no "NOK" event on the OTDR
measurement analyses of the link (Cf. Interpretation of
reflectometry measurements, p12)
4.
Make sure that the end optical connectors have been
properly cleaned (see "optical connector maintenance"
section)
5. Make sure the AROONA-STAR output multimode fibers
show no bending constraints.
6. For a link < 400 m, the connector between the existing
multimode fiber and the transceivers at the remote site's
patch panel may show a slight misalignment, decreasing
AROONA-STAR's high-speed performances. Single-mode
connectors alignment being more accurate than multimode
connectors' we recommend the existing patch panel
multimode connector to be removed and replaced by a
single-mode one.
To do so please cut the multimode fiber as close as possible
to the connector and splice to that fiber a single-mode
pigtail using a standard cladding alignment splicing program
(MMF/SMF splice via the standard splicing program, "MMF
auto").
7. The C-band transceivers (~ 1550 nm) being of better
quality (in particular on the extinction ratio), the use
of this type of transceiver can make it possible to
improve the transmission performances (instead of those in
O-band ~ 1310 nm). (see part 5 choosing your transceivers).
8.
For a link < 800 m, adding an AROONA-STAR unit at the
end-of-link could help to resolve link performance issues.
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