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Fri Feb 19 13:38:26 2021, gautam, Update, LSC, PRFPMI
Fri Feb 19 18:22:42 2021, rana, Update, LSC, PRFPMI sensiing matrix woes
Fri Feb 19 18:22:42 2021
In reply to:
PRFPMI sensiing matrix woes
look at the free swingin michelson. Should be able tu null that siggnal in all ports to define the Q phase.
If things are weird, put an RF signal nto the demod board mhich is offset from the LO by ~100 Hz and verify the demod/whitening chain is kosher.
Lock PRMI and drive lines > 200 Hz. If PRC/MICH are not orthogonal, then there may be a mis tuning of RF SB wavelength and cavity lengths.
IF PRMI is sort of healthy, we could be having a weird SB resonance in the arms.