Thomas V. & Szymon S.

The ETMY optical lever channel H1:SUS-ETMY_L3_OPLEV_SUM_OUTMON shows that the laser power on the optical lever receiver has been fluctuating - dipping to zero on a regular basis.  I tried installing a spare power supply on the laser, and it appears that the power fluctuations are still occurring, but the power now only drops down to about 6000 counts from 10000 on a regular interval.

I also centered the yaw using the translation stage controller after the signal had drifted to nearly -6 counts after a week.  The plots show the ETMY_L3_OPLEV_SUM_OUT and pitch and yaw signals around the time the power supply was exchanged and the yaw centered.