Use the HDR OTDR
The FaultMap Test
279
Tap TEST or press to do a test with the settings you
selected.
The PROGRESS screen shows Manual OTDR when the tester
uses your settings.
Note
If you want to use your settings when you are
finished with this test, make sure you save them.
See item
.
The FaultMap Test
The FaultMap test helps you record the connections in a fiber link
and identify bad connections. It can show short patch cords and
find connections that have high reflectance. The FaultMap test
gives you these results:
• Shows a map of the connectors in the link that possibly do not
show on the OTDR EventMap. The map includes connectors
that are hidden in the dead zones made by previous events.
The FaultMap test shows patch cords as short as 0.5 m for
lengths < 2 km.
• Shows connections that are poor because they have high
reflectance (> -35 dB).
• Reflective events that are apparently not connectors do not
show on the FaultMap diagram. Loss events, including bends
and splitters, are also not shown.
The FaultMap test finds events that have a reflectance larger than
approximately -60 dB on single-mode fiber. (More negative
values mean less reflectance and a better connection. For
example, a connector with a reflectance of -40 dB is better than
one with -35 dB.)
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