stefan.ballmer@LIGO.ORG - posted 02:19, Tuesday 21 July 2015 - last comment - 04:36, Tuesday 21 July 2015(19775)
PIT completely in DHARD/DSOFT/CHARD/CSOFT basis
Evan, Stefan - Loops worked - simply lowered DHARD gain by 6dB. - Had some low frequency transients right after - not clear whether they are related to the matrix - seemed to diminish later on.
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This is the spectrum at the end of today's work. We'll spend tomorrow looking at the calibration, but tentatively this spectrum was >65 Mpc after engaging the outer ISS loop (it was about 60 Mpc) beforehand.
There is also some fake 80 Mpc stretch where we were examining the settings in the online calibration. Our uncertainty about the calibration has increased as a result of this investigation.
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