Video demonstrates how to test patch cords for standard compliance

In a five-minute video posted to YouTube, Adrian Young, senior technical support engineer with Fluke Networks, demonstrates the procedures for using the company's Category 5e, 6 and 6A patch-cord adapters with the DTX-1800 CableAnalyzer.

In the video Young tests a Category 6A patch cord twice and gets significantly different results. First he runs a test using the channel adapters that come standard with the DTX-1800, plugging one end of the cord into the adapter on the main unit and the cord's other end into the adapter on the remote unit. When he runs a channel test, the tester produces a "pass" result with more than 18-dB near-end crosstalk margin. As the test is taking place, Young explains why it is inadequate - because a channel test ignores the RJ-45 connection between the cord and the test adapter, and also because the channel test allows for four connections and therefore has a lot of "leeway" for performance.

He then removes the cord from the adapaters and removes the adapters from the main and remote units, and replaces them with the patch-cord test adapters. After walking viewers through the steps of setting up the patch-cord-specific test, Young runs the test on the same patch cord. This time it passes, but with a NEXT margin of 3.3 dB - a difference of more than 14 dB from the test conducted with the channel adapter.

Fluke introduced its patch-cord test adapters in spring 2011.

You can watch the video here.