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Message ID: 9217     Entry time: Mon Oct 7 18:36:39 2013
Author: Jenne 
Type: Update 
Category: LSC 
Subject: Sensing Matrix scripts updated 

I discovered that I was not getting enough SNR on all the refl RFPDs when I actuated using the Sensing Matrix script.  The problem was that the ITMs have actuation constants that are a factor of 5 lower than the PRM.  So, I need to push on the ITMs (for MICH) about 5 times as hard as I push on the PRM (for PRCL).  I have modified the sensing matrix scripts to allow different actuation amplitudes for each degree of freedom.  If I watch the REFL PD spectra while the script is running, I see that I now have some actual SNR (as in, more than 1, which is what the SNR was for some diodes previously). 

A consequence of this is that the script to analyze past data will no longer work on sensing matrix data taken before this afternoon.  On the other hand, that data isn't very useful, since there was no SNR.

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