I can't find the posts now, but several months ago, an intermittent issue with ETMX was spotted that was narrowed down to the CPS's, possibly specfically the corner 2 cpses (?). This problem then somehow "fixed" itself and was quiet for months. As of the night of the 4th, it seems to be back, intermittently (first attached image, spectr should be pretty smooth around 1 hz, it's decidedly toothy). Looking at the Detchar pages, it shows up about 8 UTC and disappears sometime later. I took spectra from last night (second image) and everything was normal again.

Still don't know what this is. Anybody turn anything on Monday afternoon at EX that shouldn't be?