We have been running the DHARD P loop with a series of 5 resonant gains for historical and idiosyncratic reasons.  We had previously designed and tested a 1Hz boost with a bit of resonant gain to replace this a year ago, but we didn't keep this also for historical and idiosyncratic reasons.  

The attachment shows the comparison of the old resonant gain filter and the new boost.  The second attachment is a comparison of the ASC error and control signals before and after the change, things seem fine.  Our first lock with the new configuration was short, Camilla looked at the lockloss and said there were some of the fast glitches in DARM shortly before we lost lock.  

Since we still have not had a lon lock with this configuration, here are instructions for reverting it if we don't stay locked overnight:

• open ISC lock, uncomment line 3543 (switch in FM7), comment out line 3544 (switch on FM2)  uncomment line 4190
• These instructions are also in comments in ISC_LOCK.