Reports until 20:38, Sunday 23 October 2016
H1 ISC
sheila.dwyer@LIGO.ORG - posted 20:38, Sunday 23 October 2016 (30774)
HARD pit loop cut offs lowered

We've been locked at 26 Watts looking at low frequency noise, so just to make things easier I cut the HARD pit loops off a little bit lower. 

I lowered the gain of DHARD P from 30 to 20, I lowered CHARD P from -0.15 to -0.14.  I replaces the JLP25 filters with second order elipticals at 10 Hz.  I put this in the guardian to happen when we are locked below 45 Watts.

This helps DARM from about 15-27 Hz.  In the attached screenshot you can see how DARM and the coherences changed. 

Images attached to this report