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Entry  Thu Apr 11 03:38:40 2013, Den, Update, Locking, angular motion oplevs.pdf
    Reply  Thu Apr 11 10:15:55 2013, Steve, Update, Locking, PRM yaw oplev transferfunction 
Message ID: 8442     Entry time: Thu Apr 11 03:38:40 2013     Reply to this: 8443
Author: Den 
Type: Update 
Category: Locking 
Subject: angular motion 

Spectra of BS, PRM, ITMX, ITMY are attached with oplevs ON and OFF (in units of urad). Loops reduce RMS from ~2urad to ~0.3urad but phase margin should be increased. REF traces show loop OFF. <-- really?

Note how PRM pitch and yaw spectra are different in the frequency range 0.5 - 7 Hz; yaw is factor of 50 larger then pitch at 2 Hz.

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