Fluke CableAnalyzer DSX-5000, Technical Reference Handbook, Page: 427 / 700

Chapter 11: The OptiFiber Pro OTDR Module
The FaultMap Test
391
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,
are also not shown.
The FaultMap test finds events that have a reflectance larger than
approximately -50 dB on multimode fiber and -60 dB on
singlemode 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.)
Notes
Since the FaultMap test finds only reflections, do not
use it to look for fusion splices or angled physical
contact (APC) connectors.
FaultMap results do not include a PASS/FAIL status.
The results are only for your documentation of the
link.
FaultMap tests on singlemode fiber usually take
more time than OTDR tests. The test uses very
narrow pulses on singlemode fiber to make the
smallest event dead zones possible, and does more
analysis on the reflections in the link.