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Entry  Thu Jul 31 11:54:54 2014, Akhil, Summary, Electronics, PZT Calibration PZT_Y_Calibration.pdfPZT_X_Calibration.pdf
    Reply  Thu Jul 31 12:23:38 2014, Koji, Summary, Electronics, PZT Calibration 
       Reply  Thu Jul 31 14:23:28 2014, Akhil, Summary, Electronics, PZT Calibration PZT_Y_Calibration.pdf
          Reply  Fri Aug 1 18:48:46 2014, Akhil, Summary, Electronics, PZT Calibration 
Message ID: 10304     Entry time: Thu Jul 31 11:54:54 2014     Reply to this: 10306
Author: Akhil 
Type: Summary 
Category: Electronics 
Subject: PZT Calibration 

 Koji asked me to get the calibration of the PZT counts to Volts for the the X and Y ends. Yesterday, I went inside the lab and took some measurements from the digital readout of the PZT by giving in a DC offset(-5 to +5 volts) to PZT_Out and read out from these channels:

For X-end:  C1:ALS-X-SLOW_SERVO1_IN1

For Y-end:  C1:ALS-Y-SLOW_SERVO1_IN1

Since a 20dB attenuator was placed in the path of X-arm readout while taking the Transfer functions(Detail), I did the calibration measurements without removing it from the path. However, for the Y arm there was no attenuator in the readout path.

The obtained calibration values are :

X- arm PZT : [146.3 +/- 2.37 ]  counts/Volt 

Y- arm PZT :  [ 755.1 +/- 3.6]    counts/Volt

The attached are the fit and data plots for the above calibration.

Attachment 1: PZT_Y_Calibration.pdf  4 kB  | Hide | Hide all | Show all
PZT_Y_Calibration.pdf
Attachment 2: PZT_X_Calibration.pdf  4 kB  | Show | Hide all | Show all
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