Tuesday Maintenance day impact notes.
Due to Beckhoff upgrades and restarts the PCAL lasers were shutoff.
When Beckhoff came back up the PCAL Lasers oddly didn't come back up this time.
The H1:CAL-PCALX_LASERPOWERCONTROL voltage was set to 0. I took that back to 5V for both arms.
Turned H1:CAL-PCALX_LASERENABLE back on.
H1:CAL-PCALX_SHUTTERPOWERENABLE back on.
Arm specific Settings :
PCALX:
H1:CAL-PCALX_OPTICALFOLLOWERSERVOOFFSET was set back to 3.65V.
H1:CAL-PCALX_OPTICALFOLLOWERSERVOGAIN : 39.60 dB
PCALY:
H1:CAL-PCALY_OPTICALFOLLOWERSERVOOFFSET : 3.80 V
H1:CAL-PCALY_OPTICALFOLLOWERSERVOGAIN : 38.56 V
Hey future Tony, Today is the day the X Arm 18bit DAC was changed out for a 20bit as well.
I was not able to get PCALX excitations in DARM. The new 20 bit H1IOPSCEX DAC is then plugged into an 18 bit AI chassis. Dave and I went out to the End station and put an Oscilloscope on it to try and see any sort of excitation coming out of the 18 Bit AI chassis. No dice.
We will need to do more troubleshooting tomorrow.
Relvent Alog: https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=88333
Dave and I went back down to EX and Swapped out a DAC in H1ISCEX, and the Excitations and Duotone started to work again.
DAC card that was put in on Tuesday : SN 190219-10 <- bad DAC
DAC card that was swapped in today : SN150311-01 This is the working DAC.
I have since put back the OFSPD offset and Gain back to their nominal settings listed above.