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Entry  Tue Mar 2 19:52:46 2021, gautam, Update, LSC, REFL55 demod board rework 
    Reply  Wed Mar 3 22:13:05 2021, gautam, Update, LSC, REFL55 demod board rework 
       Reply  Thu Mar 4 23:16:08 2021, Koji, Update, LSC, REFL55 demod board rework D990511-00_REFL55.pdfP_20210304_215602.jpgP_20210304_222400.jpgP_20210304_222412.jpg20210304234400_IMG_0526.jpg
          Reply  Fri Mar 5 13:53:57 2021, gautam, Update, LSC, REFL55 demod board rework 
             Reply  Fri Mar 5 15:31:23 2021, Koji, Update, LSC, REFL55 demod board rework 
                Reply  Fri Mar 5 16:24:24 2021, gautam, Update, LSC, REFL55 demod board re-installed in 1Y2 REFL55.pdfdemodNoise.pdf
                   Reply  Fri Mar 5 22:25:13 2021, gautam, Update, LSC, PRMI 1f SB locking recovered PRMI1f_noArmssensMat.pdf
Message ID: 15873     Entry time: Fri Mar 5 22:25:13 2021     In reply to: 15871
Author: gautam 
Type: Update 
Category: LSC 
Subject: PRMI 1f SB locking recovered 

Now that the REFL55 signal chain is capable of providing balanced, orthogonal readout of the two quadratures, I was able to recover the 1f SB resonant lock pretty easily. Ran sensing lines for ~5mins, still looks weird. But I didn't try to optimize anything / do other checks (e.g. actuate MICH using ITMs instead of BS) tonight, and I'm craving the Blueberry pie Rana left me. Will continue to do more systematic tests in the next days.

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