Lower stages transfer functions were taken on ITMY suspension last night, while the suspension and the ISI were unlocked. During the measurement, the ISI was damped, the reaction chain damped and the main chain undamped. Results are attached as described below :

1. UIM TFs  (L1-L1)
2. PUM TFs (L2-L2)

Results look fine except the fact that they are off by a factor of 2ish (meas=2*model), which seem to be the case for other quads as well. Data was noisy for the L2 stage so I increased the drive amplitude and will run it again after closeout.

I caught other calibration issues in the process. First was a factor of 10 in the L1 sensalign matrix, the second one was a wrong factor in the matlab script "plotmatlab_tfs.m" to compensate for the transimpedance of the recently modified coil drivers.
A new safe.snap was made and commited under the svn as well as data and script.