Selecting Test Reference Cords; Testing Your Test Reference Cords; Using Mandrels For Testing Multimode Fiber - Fluke DTX-CLT CertiFiber User Manual

DTX-CLT CertiFiber Optical Loss Test Set
Users Manual
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Caution
Do not disconnect the test reference cords from
the testers' output ports after setting the
reference. Doing so may alter the amount of
optical power launched into the fiber and
invalidate the reference.
Reference values should not change by more than a few
tenths of a dB from day to day. Larger changes may
indicate a problem with the test reference cords or
connections.
See the sections on Smart Remote, Loopback, and Far End
Source modes for details on setting the reference for each
mode.

Selecting Test Reference Cords

The DTX Fiber Modules come with high-quality test
reference cords.
To ensure that your measurements are accurate and
repeatable, use test reference cords provided by Fluke
Networks or cords of the same quality. See "Replacing
Fiber Test Reference Cords" on page 61.
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Testing Your Test Reference Cords

You must test your test reference cords at regular intervals.
Use the procedure given in Appendix A to test the cords
initially. After that, use the procedure given with the
procedures for certifying cabling to monitor the condition
of the cords.

Using Mandrels for Testing Multimode Fiber

You should use mandrels when testing multimode fiber
with the DTX-MFM2 fiber modules. Mandrels can improve
measurement repeatability and consistency. They also
allow the use of LED light sources to certify 50 µm and
62.5 µm fiber links for current and planned high bit-rate
applications, such as Gigabit Ethernet and 10 Gigabit
Ethernet.
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Do not use mandrels when testing with the
DTX-GFM2 fiber modules.
Caution