jenne.driggers@LIGO.ORG - posted 14:52, Wednesday 22 March 2017 - last comment - 15:29, Wednesday 22 March 2017(35013)
RF45 being bad :(
Tragically, about 20 min ago the RF 45 started glitching. We were losing lock on Switch_to_QPDs twice before it started, so I think this isn't the #1 reason why we hadn't been locked for the first bit of time since I accidentally broke the lock.
But, while trying to look at why we might be struggling, I noticed that the RF45 is glitching and jumping around. It looks from the dataview plot attached like it started doing this right around 21:30:00 UTC.
Richard is in the CER trying to investigate, to see if there is anything obvious.
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The old plan of waiting around for a while seems to have worked yet again. Mystery remains.
It would be interesting to see if there are any glitches in the observed LO drive monitors for this chassis coincident in time. There have been the occasional RF problem with the LO on these devices which would be specific to the demodulator card if it was an LO amplifier problem.
Tagging DetChar for further investigation.