Fluke OF-500-01 OptiFiber, Technical Reference Handbook, Page: 139 / 278

5-1
Chapter 5
Using the FaultMap Function
The FaultMap ™ function is a troubleshooting tool that shows
you connections that might have problems. This function
uses event reflectance as the criteria for identifying
connections that might be bad. It is optimized for resolving
connections as close as 1 m apart on multimode fiber and
2 m apart on singlemode fiber.
Reflective events that do not appear to be connectors are
not shown on the map. Loss events are also not shown.
Note
The FaultMap function uses a reflectance
threshold of approximately -35 dB for identifying
connections that might have problems. (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.)
Since the FaultMap function identifies only
reflections, it is not appropriate for finding bad
fusion splices or bad angled physical contact (APC)
connectors.
Running the Test
Figure 5-1 shows the equipment required for FaultMap
tests.
1 Select FaultMap mode: On the HOME screen, press
A
Change Test ; then select FaultMap.
2 Select a fiber type on the Cable tab in Setup . You do
not need to select a test limit for FaultMap tests.
3 Clean the connectors on the launch fiber or patch cord
and the channel to be tested.
4 Connect the launch fiber to the OTDR port and the
channel to be tested, as shown in Figure 5-2.
Optional: To evaluate the far-end connector, connect a
launch fiber or patch cord to the far end of the link.
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