I installed an ad-hoc DOF5 filters for both PIT and YAW, and set up the input matrix to use WFSA for PIT and WFSB for YAW. The selection of sensors is based on the coherence with OMC DCPD between 200 and 400Hz (attached left).

PZT to WFS transfer functions were measured yesterday (attached, middle two windows).

I copied LLO filters, gave it some more attenuation at lower and higher frequency and rotated the phase in a direction that I thought would work for the measured TF.

I didn't do any tuning except to turn the servo on and to change the gain so it started to squish 300Hz bump in IM4 trans SUM.

I'll leave it OFF for now.