Last Friday, I created a set of complementary filters with a 40mHz blend frequency. I computed newblend filters and installed them on stage 1. After turning on the isolation loops (level 3) and lowering the blend frequency at 40mHz on stage 1 and 100mHz on stage 2, I left the BSC-ISI (ITMY) isolated for the week-end. Note that the HEPI was controlled in position (100mHz) and the sensor correction was not engaged.

This configuration passed the 3-day week-end. I have attached a nice spectra of the stage 2 motion in the Y direction (seen by the GS13s).