Dave, Corey, Rahul

Yesterday, Cheryl made changes on the ETMX mode 6 damping filter settings (alog 54043), which she did not load to make sure that we don't go out of observing. This morning I loaded these changes (alog 54063) . However, it didnt go well and etmx mode 6 got excited very quickly (monitor level 5.5ish), after IFO was relocked (lockloss due to an earthquake) this morning and new settings were initiated. I manually adjusted the gain (reduced it from +5 to +1) which worked and the peak excitation went below 1.0. However according to Cheryl's alog the changes would also affect ETMY mode 6 (510.7264Hz) - which I still have to understand how.

In the meanwhile to keep things simple and buy some time, I requested Dave to revert this specific change and he will be posting a separate alog on this.