Since I've installed the new BSC-ISI model here at LHO (https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=11630), I wanted to check if the T240 simultaneous gain switching was working when the T240 are in the loop.

It works fine when I switch from high to low gain, but it doesn't work when I go from low gain to high gain: you can see a glitch appearing in the drive.

I've done this test 3 times and it's repeatable. We might want to implement something to take care of those drive glitches.