Reports until 22:48, Tuesday 29 October 2019
H1 SQZ (Lockloss, SQZ)
lee.mcculler@LIGO.ORG - posted 22:48, Tuesday 29 October 2019 (52790)
Lockloss from SQZ switch to seeding diagnostic

Lockloss at 22:44 was from squeezer starting a seeding measurement. The LO loop was disabled, but the integrator/boosts weren't disabled first. The output ran away and pushed some sideband through the IFO carrier. It shouldn't have range now to push the CLF through IFO carrier, so perhaps there is something else lurking. Should investigate this with homodyne LO. The servo hit the +10 rail.

 

Anyway, for seeding/backscatter measurements with IFO, disable the boosts first.