Chapter 11: The OptiFiber Pro OTDR Module
OTDR Results
347
Table 14. Event Types in the Event Table
Event Description
Reflection
A pulse of light reflected
back to the OTDR.
Reflections are caused by a connector, a tight
bend, a mechanical splice, or a crack in the
fiber. Reflective events can possibly be ghost
events. These are frequently smaller than
reflective events that are connectors.
If the reflection is not caused by a connector,
inspect the cable for tight bends or damage.
Use a visual fault locator to verify the fault.
OTDR Port
The connector on the
OTDR.
This event is the OTDR port on the tester. The
OTDR Port
event always shows N/A for loss
because backscatter measurements are not
available on both sides of the event.
For SmartLoop tests, the OTDR Port
event for
Fiber B is the near end of the loopback cord.
For the second part of a bi-directional test, the
OTDR Port
event for Fiber A is the near end of
the loopback cord. See Figures 155 on page
381 and 157 on page 387.
The tester does not give a PASS/FAIL status to
this event.
Launch
The end of the launch
cord.
Tail
The start of the tail cord.
The tester identifies these events if you
connected launch and tail cords and turned on
LAUNCH COMPENSATION on the TEST SETUP
screen. See “About Launch and Tail Cords” on
page 319.
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