I noticed that the Pcal Y (alog 16815) had been disabled since 9 am yesterday in local time. After chatting with Sudartian, I turned it back on this morning by enabling H1:CAL-PCALY_OSC_SUM_ON in the PCAL_END_EXC screen.

The peak height at 540 Hz seemed unchanged with a variation less than 1%, comparing todays' Pcal line and the one from Feb 21st. The peak height was 7.70031x10^-18 m/sqrtHz in with 0.1 Hz BW, 70% overlap and Hanning window in H1:CAL-PCALY_X_PD_OUT with the nominal calibration (alog 16815).