gabriele.vajente@LIGO.ORG - posted 16:08, Monday 29 October 2018 - last comment - 15:42, Tuesday 30 October 2018(44891)
Updated suspension control filters for SRM, PRM and BS
I updated the control filters in CAL_SUM_PRCL, CAL_SUM_SRCL and CAL_SUM_BS to match what is now used in the suspension models.
Changes have been accepted into the SDF.
I also updated the optical gains in the error signal calibration. Differences were small (within 20-30%)
The M1 calibration path for PRCL is limited by numerical noise, which appears as a spurious increase of the high frequency noise floor in the calibrated PRCL signal.
To prevent this, I switched off the M1 paths in PRCL, SRCL and MICH. This means that the low frequency calibration might be a bit wrong (what low frequency means depends on the cross-over frequency between M3/M2 and M1)