Abstract:

I repeated ring down measuremnt for three ITMY modes at 23.7558 Hz.
For the other modes, I could not find any peaks on K1:MIR-AS_PDA1_RF17_{I,Q}_OUT_DQ, so I gave up to perform ring down measurement.

Detail:

First, I recovered the WFS control implemented during the measurement reported in klog35759.
Though the detail configuration is not shown, it seemed the setting shown in fig1.

After that, I checked the signals of K1:MIR-AS_PDA1_RF17_{I,Q}_OUT_DQ with excitation at 23.756 kHz, 23.878 kHz, and 23.909 kHz.
I could see the peak at 23.756kHz, while I could not see at the other frequencies, so I only performed ringdown measurement for 23.756 kHz mode.
Since the precise resonant frequency seems 23.7558 kHz, I used this frequency value for the excitation.

I once tried to use Q measurement code stored at /users/Commissioning/Q_meas/substrate/ but failed due to accidential hung up of k1ctr2.
In addition, I tried to use it with number of measurement of 1 but failed with some errors (fig2).
Furthermore, the script seems waiting for too long time for the ring up and ring down the resonant mode.
So, I just repeated the excitation and ring down manually this time.
Attached txt file shows the time in JST when the ring down was started (excitation was stopped).

At least in the spectrum in the diaggui with exponential mode can clearly show the slow decay of the peak height, so I hope the data can be used for the analysis.