So have had a continuous exponential spectra of the WHAM6 CPS signals running on the desktop watching for the grounding or whatever-it-is noise on the Corner3 sensors. The attached snap shows this new noise. The reference and the thicker traces are the corner3 signals, which look fine. The other four fine traces are the corners 1 & 2 signals. This isn't even the worse of it but it looks very similar to the corner3 noise seen previously while messing with the cabling there the last few days. Note that the corner3 channels are in one satellite crate and corners 1 & 3 are in the other. I'm suspicious activity around the chamber has disturbed the ground of that crate and made it iffy.
I went back to about 1pm yesterday (1900 utc 28 March) and watched the spectra until it went noisy like this. First time I spotted was 0130 pdt this morning. Will check with EE to see if they know of anything.
This noise has come and gone since starting and wouldn't bee too worried about it if it was associated always with activity near by the satellite crate but as it started in the wee hours...
Haven't been staring at this all day but haven't seen this noise pop up again all day. Haven't looked at crate or talked with EE. Will comment tomorrow.
Got a typo in the main (can't edit anymore): "...the corner3 channels are in one satellite crate and corners 1 & 3 are in the other." should be corners 1 & 2 are in the other.
Sorry for confusion. Still haven't made it out to the box to inspect but I haven't noticed any problem with the spectra either since ~9am yesterday.