During maintenance I turned on the new op lev damping roll off filter.  (34954)  This means that oplev damping noise should be about a factor of 3 below the ASC noise (and the DARM noise) at 10 Hz.

Attached is a comparison of new/old open loop gain measurement made with no power in the arm, and the drive levels in low noise with the new filter engaged.  For a comparison to the drives with the old cut offs see 34735