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Message ID: 2132     Entry time: Tue Mar 13 15:32:49 2018
Author: Craig 
Type: DailyProgress 
Category: ISS 
Subject: Trans DC jumpiness 

When the cavities relock themselves, our Trans DC values change drastically.


I just noticed this when the North cavity lost lock while I was messing around with some optics.  The autolockers worked their magic, but upon relocking the NCAV_TRANS_DC value went from ~3 V to ~4 V.  It's been as low as 0.9 Volts as well, that's why I changed the thresholds for awade's NCAV autolocker .ini file.
What the heck?  We know they are locking to the same fringe, at least for the Fabry-Perot cavity.  The PMC is locked to a different fringe though, maybe this increased it's power output?  But that wouldn't explain the South path jumps.
Unclear why this would happen.

First plot: Last 30 minutes.
Second plot: Last 12 hours.  EVEN CRAZIER

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