Last night I took a calibration measurement (broadband and simulines) after the IFO was locked for about 3.5 hours. This generated calibration report 20251204T035347Z.
The results from broadband and simulines on the front page look reasonable. The plot label indicates that these are from PCAL X and Y but I think the broadband and simulines are run on PCAL Y only, so I don't know if PCAL X agrees with Y. I believe as of last night, the DAC for PCAL X had been swapped.
I made no changes to the pydarm ini file to account for the DAC change before running the report.
Jeff and I looked over the report and have concluded that the changes we see are very minimal, and do not require any updates to the calibration at this time.
There is a 1% change in the L3 actuation strength, comparing the measurement from 11/18 and 12/04. This could be from the DAC change or it could be from charging. Either way, it is small enough that kappa TST is likely correcting this properly. The overall systematic error is still around 1%, as it was before the DAC change.
We don't think there needs to be any changes to the pydarm ini file at this time.