We have a DOR card which produces strange-looking TCAL waveforms on wire pair 1.

The following is a plot of the DOR waveforms, followed by the DOM waveforms. Each color represents a particular DOR card (results from 4 DOR cards are displayed).

In each case, two of the waveforms (corresponding to two DOMs on one wire pair), look sick. In the case of the DOR waveforms, their overall level is shifted lower, and in the case of the DOM waveforms, there is a much bigger difference between normal-looking TCAL waveforms and the sick-looking ones.

I should point out that I switched quad cables to verify that the problem was dor-related (as opposed to being dom-related).