nicolas.smith@LIGO.ORG - posted 16:06, Saturday 06 September 2014 - last comment - 17:44, Saturday 06 September 2014(13799)
Installed new OMC alignment matrices
The matrices described in 13703 were installed. This caused a noticable improvement in the shape of the QPD alignment OLGs. They are now more clearly a clean 1/f shape.
I also tuned the OMC LSC demod phase and set the gain for a 80Hz UGF. (This was done by opening the LSC loop and sitting on the side of a resonance and tuning the phase until the Q signal was 0)
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I suppose the matrices Nic used are the ones described in T1400585
There is some factor adjustment from the one in ALOG 13703 such that we now have the servo inputs calibrated in um and urad for POS and ANG.