Jeff wanted me to see if I could find some cavity signals to assess the performance of the corner station ISI's after my work on the HAM's on Tuesday. The commissioners gave us a bunch of channels to look at, but it looks like there haven't been any DRMI lock stretches long enough for us to get good spectra. I've attached trends of the 4 channels we want to look at. SRCL, PRCL and MICH all have whitening filters (starting at 1hz) that would need to be divided out. Kiwamu said that  LSC-POPAIR_B_RF18_I_ERR_DQ is above 600 counts when DRMI is locked.