Open loop transfer function of DARM was measured with more wide frequency ranges.
Our transfer function model agrees well with measurements as shown in Fig.1 and Fig.2.
Current DARM model already contains also all circuits response that zpk parameter is theoretical values not measured value.
According to the latest measurement, DARM optical gain from displacement to DARM_IN1_DQ is ~8.67dB (Old value was 8.45dB. So it's a change as ~3%.)
Calibration was updated around 19:48 based on this measurement and now h(t) is provided with new calibration parameters.
Now rough calibration which is subtracting all effects excepting optical gain from measured transfer function can be done from the commissioning dock.
It works with only a few clicks if there is no change in DARM control configuration e.g. change of engaged FMs on DARM1, DARM2, LOCK_L, etc.,
but checking the existence of change in DARM control configuration is the most hard work...
klog#21733 may be slightly helpful to check it.