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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: 10324     Entry time: Fri Aug 1 18:48:46 2014     In reply to: 10307
Author: Akhil 
Type: Summary 
Category: Electronics 
Subject: PZT Calibration 

 

 The PZT actuation on the laser frequency in MHz/V ( assuming the previous calibration here of the PZT count/V) is :

X- arm: 33.7 MHz/V

Y- arm: 14.59 MHz/V

This number seems to be wrong by a factor of 10. 

So we[I and EricQ] decided to trace the cables that run into the ADC from the PZT Out. We found a black LEMO box in the path to ADC,which is  an anti-aliasing filter for each input channel. However,in theory the response of this filter should be flat up until a few kHz i.e. for  the DC gain it should be 1. But we will manually test it and look at the DC gain of the LEMO box.

 

 

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