About oplevs, I just started with the noise hunting. The attached figure shows anti-calibrated spectra of all the oplve outputs in the unit of counts/rtHz. For example, the current spectrum of K1:VIS-EY_TM_OPLEV_YAW_OUT_DQ is divided by the current value of K1:VIS-EY_TM_OPLEV_YAW_GAIN, and then multiplied by K1:VIS-EY_TM_OPLEV_SUM_OUTMON, which I took an average value for each mirror in the of VIS_CUST_TYPEC_TM_OPLEV.adl.

The high frequency parts seem mostly the same; the exceptions are that of MCi and MCe. I'm not sure why now, but one note is that these two are now using dither for the alignment controls. And I found "FM1" in front of the calibration factor are green for these two mirrors in VIS_CUST_TYPEC_TM_OPLEV.adl's screen. Please tell me if you true experts know something...