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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: 7739     Entry time: Sat Nov 24 13:58:07 2012     In reply to: 7738     Reply to this: 7743
Author: rana 
Type: Update 
Category: LSC 
Subject: calibration of arms 

For the loop diagnosis, its best to use the method of "IN1/IN2", rather than manipulate the close loop gain. In this way, you can directly plot the swept sine measurement from DTT as the open loop gain.

Also, for reporting calibration, we should all try to record the current settings better. Anything that may change the loop gain should be recorded along with the Bode plot and the DATA must be posted to the elog - no more of just posting plots.

We need to know, e.g.

  1. what is the power in the arms?
  2. are the LSC whitening filters on?
  3. are the SUS dewhitening filters on?
  4. What normalization is being used in the LSC?
  5. What digital filters are on in the X/YARM loop filter bank?

Resistance is feudal.

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