Have had a 3 attempts dashed by locklosses before getting through various ASC steps..... Will keep making more attempts and see if I can try to employ the script (alog #51282) to stamp down CONTROL signals when they get ugly (have not tried that yet). I reckon I will if I keep running into a wall, I'll run an alignment (although the arms & DRMI look fine).
Here are notes on the 1st lock:
7:15 Continuing Locking with this my first Lock#1
- Hung out at ENGAGE DRMI ASC & OFFLOAD DRMI ASC for a while.
- Lockloss at while waiting for signals to converge at ENGAGE SOFT LOOPS.
- Did not see an ERROR signal ring up & so I was not able to run the Gain Reduction Script (from alog#51282).
- I did see CONTROL (attachment#1) and ERROR (attachement #2) signals get bigger on the wall Strip Tools (unfortunately, I didn't get a snap of the ASC ndscope....
- But on the ASC ndscope I didn't see anything getting big/noisier.
Lock #3: lockloss at LOWNOISE COIL DRIVERS
Thought we had a chance on this one as we made it through ASC steps (but maybe I should have hung out at LOWNOISE ASC just to monitor the ASC ERROR signals for a bit).
I did hang out at PREP ASC FOR FULL IFO, ENGAGE ASC FOR FULL IFO, & ENGAGE SOFT LOOPS to watch the ERROR signals...nothing really obvious. I saw CSOFT pitch get a little bigger, and tried the script JeffK mentions, but did not see any effects on this ERROR signal.
Attached is the ASC ndscope, and here you can see there was no obvious ringing up to address.
NOTE: Feels like alignment is not an issue here, so will continue with babysitting/babystepping through ISC_LOCK steps.
