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Entry  Wed Nov 21 21:06:13 2012, Ayaka, Update, LSC, calibration of arms 7x
    Reply  Sat Nov 24 13:58:07 2012, rana, Update, LSC, calibration of arms 
       Reply  Mon Nov 26 10:42:06 2012, Ayaka, Update, LSC, calibration of arms armcalib.zip
Message ID: 7743     Entry time: Mon Nov 26 10:42:06 2012     In reply to: 7739
Author: Ayaka 
Type: Update 
Category: LSC 
Subject: calibration of arms 

I uploaded a zip file that contains data files used for the calibration.

OLTF_x/y.txt: the open loop transfer function (measured by IN1/IN2 in arm servo filter bank).
coh_x/y.txt: coherence of OLTF. I used the data where coherence > 0.98.
ext_err_x/y.txt: the transfer function from ITM excitation signal to POX/POY error signal.
coh_x2/y2.txt: coherence of ext_err. I used the data where coherence > 0.98.

The LSC whitening filter was off because the xarm was unlocked when the POX Q whitening filter was turned on. (We have to study what was wrong.)
The SUS whitening filters were on.
The all digital filters except +6dB filter were on.

Attachment 1: armcalib.zip  6 kB
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