Summary

Initial call was because the IFO was waiting to turn on the OMC whitening since the violins are elevated, though I thought this was something we fixed. The whitening was safe to turn on minutes after I started looking at it, but the SQZer couldn't lock the FC. Once I fixed the FC alignment, I had to futz with the SQZ ASC, then all was well. There were some SDF diffs. Violin modes 5&6 of ITMY aren't damping well, not a new issue. Back to Observing at 0905UTC.

SQZ

H1:SQZ-FC_TRANS_C_OUTPUT wasn't getting flashes above 17 (the wiki says it should be above 100). I followed the instructions in the wiki and adjusted FC2 to get good flashes in the cavity and eventually got it to lock. It was left with a "FC ASC not on??" notification. Sure enough, H1:SQZ-FC_ASC_TRIGGER_INMON was at 1.5, still lower than the recently lower 2.0 trigger threshold(alog82853). I tried to touch up FC2 a bit more and got the trans output up to 112, but the trigger input was still at 1.5. I cycled SQZ_FC guardian node and was back in the same place. I then lowered the threshold to 1.5 and it turned on the ASC, temporarily raising the trans output and bringing the trigger input to 4.5. Range was at 146Mpc but we were still thermalizing so I didn't want to tune much else.

SDFs

There were two SDFs - H1:LSC-LOCKIN_1_OSC_TRAMP and H1:SYS-MOTION_C_PICO_I_CURRENT_ENABLE, both reverted.

Violins

While I was here I checked to make sure the violins were damping well. All seemed good except maybe ITMY 5&6. We've recently gone through some gain and phase changes to this mode (alog82977 alog82963). At this point mode 5 looked to be slowly decreasing, but  mode 6 wasn't really moving. This was better than increasing though, so I left the settings as they were.