[Ian, Koji]
In preparation for the replacement of the suspension electronics that control the ETMY, I took measurments of the system excluding the CDS System. I took transfer functions from the input to the coil drivers to the output of the OSEMs for each sensor: UL, UR, LL, LR, and SIDE. These graphs are shown below as well as all data in the compressed file.
We also had to replace the oplev laser power supply down the y-arm. The previous one was not turning on. the leading theory is that it's failure was caused by the power outage. We replaced it with one Koji brought from the fiber display setup.
I also am noting the values for the OSEM DC output
OSEM |
Value |
UL |
557 |
UR |
568 |
LR |
780 |
LL |
385 |
SIDE |
328 |
In addition the oplev position was:
OPLEV_POUT |
4.871 |
OPLEV_YOUT |
-0.659 |
OPLEV_PERROR |
-16.055 |
OPLEV_YERROR |
-6.667 |
(KA ed) We only care about PERROR and YERROR (because P/YOUT are servo output)
Edit: corrected DC Output values |