jenne.driggers@LIGO.ORG - posted 15:36, Tuesday 01 August 2023 - last comment - 17:12, Tuesday 01 August 2023(71886)
Some cameras flickering to blue
Out of the corner of my eye, I noticed some of the cameras flickering to blue (frozen). It's certainly happening to the OMC trans camera (which isn't so critical), but I think it was also happening to some of the cameras on Nuc35, although I can't say which of them were flickering. If either ETM or the BS camera freeze for a long time, we'll get pushed out of Observing as the camera servo guardian will transition us back to ADS. I ping-ed Dave and Patrick in the control room chat channel to see if they had any thoughts.
I've seen the ETM cameras go blue for a second or two a couple of times today, they go blue and then come back at the same time.
Erik, Tony, and Patrick were having a look at this earlier (and noted it in alog 71893). It seems to all be fine for now. It does look like the OMC trans camera (which is the camera 15 that they noticed restarting) came back with much higher than usual exposure. I have set H1:VID-CAM15_EXP_REQ back to its nominal (according to ndscope) value of 500, since we're out of Observe anyway for calibration measurements).