J. Kissel, R. Schofield,

Robert was making ground motion comparisons between PEM channels and SEI channels, and discovered that the H1:ISI-GND_STS_ETMY_[X,Y,Z]_DQ were reading ADC bit noise. Confused, having heard that the STS-2 had been re-installed about two-ish weeks ago, I took a look around and found the usual confusion between A, B, and C, channels in HEPI vs. ISI. The agreed upon, end-station, cabling configuration is to plug in the STS-2 to the B channel for both HEPI and ISIs, such that it gets routed in at the top level of the front-end model, in through the isi2stagemaster library part, then up out again to be stored in the frames once and only once. However, this means that the STS distribution chassis must have its output plugged into BOTH HEPI and ISI's "B" ADC channels. Currently, the STS is happily plugged into HEPI's B channels, but ISI's version is plugged into the A channels. It also doesn't have its calibration filters turned on. 

Queue sad trombone. *wahn*wahn*. 

We'll fix it on Tuesday (or earlier if the analog CDS crew has time).