J. Kissel, K. Izumi, D. Tuyenbayev,

Since the noise floor of the IFO is currently higher compared to O1 levels (see attachment 1) the SNR of the calibrations lines are not sufficient to resolve the DARM time-dependent parameters with an under 1% uncertainty. We have increased the calibration line amplitudes.

37.3 Hz x_ctrl, 35.9 Hz ESD and 36.7 Hz Pcal line amplitudes were increased by a factor of 5; and the 331.9 Hz Pcal line amplitude was increased by a factor of 3. To ensure that PcalY have enough drive range, we switched off the 1kHz line (the 7.9 Hz line which is using a major part of the drive range is still running).