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Entry  Thu May 23 20:39:50 2013, Jenne, Update, LSC, PRMI sensing matrix measured at 580.1Hz SensMat_23May2013.png
    Reply  Thu May 23 22:13:12 2013, Koji, Update, LSC, PRMI sensing matrix measured at 580.1Hz 
       Reply  Fri May 24 13:41:19 2013, Jenne, Update, LSC, PRMI sensing matrix measured at 580.1Hz SensMat_23May2013_withIQ.png
          Reply  Fri May 24 14:01:59 2013, Koji, Update, LSC, PRMI sensing matrix measured at 580.1Hz 
             Reply  Fri May 24 14:40:22 2013, Jenne, Update, LSC, PRMI sensing matrix: now what? 
                Reply  Fri May 24 22:18:33 2013, Jenne, Update, LSC, PRMI sensing matrix: Got it! SensMat_23May2013_withIQ_andCorrectPhases.png
                   Reply  Tue May 28 14:52:56 2013, Jenne, Update, LSC, PRMI sensing matrix: Got it! SensMat_21May2013_withIQ_andCorrectPhases.png
                      Reply  Tue May 28 17:06:04 2013, Koji, Update, LSC, PRMI sensing matrix: Got it! 
Message ID: 8642     Entry time: Fri May 24 14:40:22 2013     In reply to: 8641     Reply to this: 8644
Author: Jenne 
Type: Update 
Category: LSC 
Subject: PRMI sensing matrix: now what? 

Quote:

It's hard to believe but is AS55Q really almost insensitive to MICH?

Well, anyway, now it is the time to use the automatic demod phase (and input matrix) adjustment.

 I am also wondering if I understand / am using the demod phase from the screen correctly.  This plot is indicating that MICH is entirely in I, and not at all in Q.

Currently, I take the demod phase, and plot that as the "I" line, then plot the "Q" line 90 degrees away from the I line.  Maybe it should be the other way around?

Re: the auto-demod phase, I was starting to wonder about that.  For each sensor, can I declare what degree of freedom I want in which quadrature to take priority (ex. MICH goes to REFL55 Q), and set the demod phase to the value that makes that true?

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