EXFO FTB-7000 OTDR for FTB-200 v2 - Manual (Page 295)

OTDR 281
17 Troubleshooting
Problem Cause Solution
The application displays
a message indicating
that a “Non-resolved
fiber end” event has
been found.
The fiber under test is
too long.
Ensure that the fiber under test is
shorter than the maximum length the
OTDR can measure.
In multimode fiber
testing, launch level
remains out of the
launch window (light
green rectangle) even
after cleaning and
verifying connection.
Wrong fiber type
selected.
³
If you are testing C fiber, from the
Auto or Advanced main window,
select MM 50 μm.
³
If you are testing D fiber, from the
Auto or Advanced main window,
select MM 62.5 μm.