ITMX TM 1 stage -> 0 stage
ITMX IMH/IMV 3 stage -> 0 stage
ITMX MNH/MNV 2 stage -> 0 stage
(Fig.1.)In case of the TM, we can see the excess in 50-110 Hz, but this excess is less than 10 times, so ITMX TM DAC noise may not limit the sensitivity, but there are possibility "sum of DAC noise of several suspensions" affect to the DARM sensitivity.
(Fig.2. - 4.)No significant excess were detected in case of the IMH, IMV and MNH, so the DAC noise effect would be much less than current DARM sensitivity.
(Fig.5.)In case of the MNV, we can see some excess in 10-100 Hz, but this excess is less than 100 times, so ITMX TM DAC noise may not limit the sensitivity, but there are possibility "sum of DAC noise of several suspensions" affect to the DARM sensitivity.
(Blue : current sensitivity Red : DAC de-whitening filter off for certain stage.)
