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The launch cord also lets the you see events that are close to the
OTDR. Without a launch fiber, those events can be hidden by the
large reflection, or dead zone, caused by the OTDR's port.
Fluke Networks recommends that you use launch and tail cords.
You should also use the launch/tail cord compensation function
to remove the lengths of these fibers from the OTDR
measurements.
If you select a test limit that requires you to use launch and tail
cords, the tester shows a warning message when you try to do an
OTDR test without launch and tail cords.
W
For tests on cabling that has angled physical contact
(APC) connectors, use only launch/tail cords that
have APC connectors at the ends connected to the
cabling. Other connector types cause large
reflections that can cause unreliable test results.
Do not use hybrid patch cords to connect the
launch or tail cords to the cabling under test. Use
launch and tail cords with the correct connectors
to connect directly to the cabling under test. This
gives the best measurement of the first and last
connectors in the link. Launch and tail cords with
different types of connectors are available from
Fluke Networks.
Launch + Tail compensation usually gives the most
accurate measurements.
The style of the case for your launch/tail cords can
be different from the cords shown in this manual.
GlobalTestSupply
www.
About Launch and Tail Cords
Caution
Notes
Notes
.com
Use the OTDR
203
sales@GlobalTestSupply.com
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