DTX-PCU6S Patch Cord Adapters
Users Manual
8
Mechanical Stress Tests for Patch Cords
Every patch cord design should be evaluated for changes in performance
−
particularly
return loss performance
−
under mechanical stress. Refer to the TIA/EIA or ISO/IEC
standards for details on stress tests.
Since it is not practical to perform the stress tests on every patch cord produced, you can
test samples of production patch cords to ensure quality. The sample size depends on
the desired quality level. Alternately, you can use the stress tests to determine the
possible shift in performance, then apply the shift to worst-case margins to ensure that
patch cords meet specifications under worst-case conditions. You can apply the shift as
you test, or you can use LinkWare software to upload test results to a PC for evaluation.
Replacing the Adapter's Jacks
The RJ45 jacks in the DTX-PCU6S adapters are typically good for 5000 insertions when
used continuously.
When used non-continuously, the lifetime may be reduced to 750 insertions. After 750
insertions, the gold plating that prevents oxidation on the contacts may be worn away;
however, continuous use wipes off the oxidation and extends the life of the contacts.
W
Caution
Testing patch cords that have poorly crimped plugs may reduce the life of
the patch cord adapter's jacks.
When to Replace Jacks
You should replace the jacks when any of the following occur:
•
Margins for patch cord tests begin to shrink.
•
Patch cord tests, particularly wire map or return loss tests, begin to produce
intermittent and/or inconsistent results.
•
The jacks have been used for more than 5000 insertions.
•
The test described in Appendix A: “Characterizing and Testing the Adapters’
Performance” fail or the results are noticeably different from those observed when
the adapters were new.
You may also want to replace the jacks with Cat 5e jacks to optimize the adapters for
testing Cat 5e patch cords.
Replacing the Jacks
h
Caution
The DTX-PCU6S adapters contain static-sensitive devices. When replacing the
RJ45 jack, follow guidelines for preventing electrostatic discharge (ESD).
Note
To ensure reliable operation, replace the entire DTX-PCU6S patch cord
adapter after the RJ45 jack has been replaced 10 times.
1
Use a TORX PLUS
driver, size T-7, to remove the three screws from the backs of the
patch cord adapters.
2
Take the adapter cases apart and remove the circuit boards from the cases.
