DTX question (Ethernet wire testing and Split Pair)

[dima-m]

i had dtx done on a 4-wire Ethernet cable and received a split pair error on DTX-1800 unit....; not sure if this definitely means that connector is miswired or if the wire harness too degraded and should be replaced.

Argument about harness not being miswired (as i was given by one of the senior guys) is that mis-pinning will create a crossed wire or connection situation resulting in incorrect data tx/rx. In a twist pair configuration each of the wire pairs are matched for a Tx/Rx or High/Low transmission line and due to cable being pretty long (100 feet or so) cable has degraded enough i.e. the twist applied during its manufacturing has become less effective toward frequency separation or out of tolerance for the length of the installed run that allows.(not sure how accurate this statement is)

i attached few pictures of the test results to give better detail

 

[libellis]

If the DTX says there is a split pair, then the wiring is wrong. No other degradation of the cable will produce a split pair reading. (I'm assuming that you're using the word "harness" to mean the "cable" and not something else.) Note that the suggestion that a degraded, but correctly terminated, cable with poor frequency response or high pair crosstalk can create a split pair reading on the DTX is not correct.