During checking the results of auto-measurement, I found that SR3 TM stage has and unexpected low-pass filter somewhere. See attached.
Black lines are references (old data), and red lines are newly measured data.
Could someone check from where this low-pass comes?
See entry 9823.
Given the situation described in entry 9823, I did more investigations.
It happens that he currently used whitening chassis (JGW-S1808109) does not have a whitening filter board in it, therefore, the configuration switches don't have any effect.
We should replace it by a suitable chassis.
Given the situation described in entry 9823, I did more investigations.
It happens that he currently used whitening chassis (JGW-S1808109) does not have a whitening filter board in it, therefore, the configuration switches don't have any effect.
We should replace it by a suitable chassis.
I turned off the eight software anti-whitening filters (AntiWTN) in the OPLEV INPUT FILTERS block and took a payload model safe snapshot. I will turn them back on when we replace the whitening chassis.
