
Chapter 3: Certify Twisted Pair Cabling
“Bad Patch Cord” Message
95
“Bad Patch Cord” Message
To comply with standards for tests on channels, the tester
removes the effects of the channel adapters and their
connections from the test results. Before it removes these effects,
the tester makes sure that the plugs on the patch cord do not
have too much near-end crosstalk (NEXT). Too much NEXT is
frequently caused by too much untwisted wire in the plug. If a
plug is bad, the tester shows the message
Bad patch cord at main
or
Bad patch cord at remote
, and does not remove the effects of
the channel adapters and their connections. The tester saves the
message with the results.
If you see one of these messages, replace the patch cord or install
a new plug at the bad end.
How to Certify Patch Cords
To certify patch cords, you must use the DSX-PCxx Patch Cord
Adapters and the correct patch cord test limit. You cannot use
channel adapters and test limits to certify patch cords because
channel tests do not measure the performance of the patch cord
plugs.
To purchase a DSX-PCxxS Patch Cord Adapter Set, contact an
authorized Fluke Networks distributor.
Содержание CableAnalyzer DSX-5000
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Страница 159: ...Chapter 3 Certify Twisted Pair Cabling Frequency Domain Results 123 GPU71 PNG Figure 52 NEXT Plot...
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