jim.warner@LIGO.ORG - posted 21:17, Sunday 31 March 2019 - last comment - 07:48, Monday 01 April 2019(48104)
SDF diffs after relocking
Lost lock, relocked with minimal touching, but on getting to NLN, there is an SDF diff. The OSC3 to AO3 element on the LSC outpu matrix is set to 1. Not sure what this means, OSC3 and AO3 aren't exactly descriptive. Have accepted and back to observing.
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Hmmm. This should have been set to 0 by the AWG_LINES guardian. Anyhow, since we're out of Observing for sweeps, I have set it to zero and accepted this in SDF. There wasn't an excitation going, and the analog enable switch was off, so there's no problem with this having been accepted, but it's now set to zero.