A-1
Appendix A
Characterizing and Testing the Adapters’ Performance
Introduction
This appendix describes how to characterize the performance of the DTX-PCU6S
adapters. You can use the results from this test for the following:
•
Determining when the RJ45 jacks need replacing, or the adapters are otherwise
damaged
Category 6 patch cord test limits are very tight. You may see many failures and,
consequently, may wonder if the test adapters are working properly. The RJ45 jacks
in the adapters wear out with use. Worn jacks or other damage to the adapters can
cause tests to fail. The performance test helps you determine when the jacks need
replacing or the adapters need service center repair.
•
Verifying the adapters’ performance
The performance test lets you verify the adapters’ performance after you replace
the RJ45 jacks in the adapters, purchase replacement or additional adapters, or
anytime the adapters’ performance seems questionable.
While it is not possible to fully evaluate the adapters’ performance in the field, the
test described in this section help you characterize the adapters and determine if
they are working properly.
DTX-PCU6S Performance Test Using a Reference Patch Cord
When you first receive your adapters, you should test a patch cord and save the cord
and test results for future reference. You may use the patch cord and its results later to
determine if the adapters’ RJ45 jacks need replacing or to verify the adapters’
performance.
To test the adapters when you first receive them, do the following:
1
Attach the DTX-PCU6/MN adapter to the main DTX tester. Attach the DTX-PCU6/SR
adapter to the remote DTX tester.
2
Select an appropriate patch cord test limit in SETUP.
3
Run an Autotest on some patch cords to find one that passes. A PASS* result is
adequate.
4
Save the test results from a compliant patch cord and mark the patch cord ends with
“main” and “remote” as it was connected during the test. Store the reference patch
cord for later use.
Notes
To help ensure consistent return loss measurements from the reference
patch cord, do not mechanically stress the cord. Patch cord properties can
change when the cord is bent or twisted.
When you test the reference patch cord later, use the same main and
remote DTX testers as were used for the initial test. The serial numbers of
the testers are saved with the test results.
