About Launch And Receive Fibers - Fluke FIBER OneShot Pro User Manual

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About Launch and Receive Fibers

Launch and receive fibers give the troubleshooter a better view
of the first and last connectors in the link. If you do not use a
launch fiber, the troubleshooter cannot detect the loss of the
first connector in the link. If you do not use a receive fiber, the
troubleshooter cannot detect the loss of the last connector in
the link. Also, the reflectance measurement for the first and last
connectors will be inaccurate.
Usually, you do not need to use a launch or receive fiber with
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situations:
•
You must use a launch fiber if you want to detect a loss
incident (such as a connector, splice, or macrobend) in the
first 30 m of the fiber link.
•
You must use a receive fiber if you want to detect the loss
of the last connector in the fiber link.
If you use a launch or receive fiber, it must have a minimum
length of 30 m (98 ft).
When you use launch or receive fibers, be sure to subtract their
lengths from the length measurement to get the actual length
of the fiber you are testing.
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