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Message ID: 59     Entry time: Sat Nov 3 16:20:43 2007
Author: waldman 
Type: Summary 
Category: OMC 
Subject: A good day's work 

I followed up yesterday's test of the PZT with a whole mess of characterizations of the PZT control and finished the day by locking the OMC with a PZT dither lock and a 600 Hz loop. I haven't analyzed any of the data yet, so its not calibrated in physical units and etc. etc. etc. Since a lot of the sweeps below are of a "drive the PZT, look at the PDH signal" nature, a proper analysis will require taking out the loop and calibrating the signals, which alas, I haven't done. Nonetheless, I include all the plots because they are pretty. The files included below are:

  • DitherLock_sweep: Sweep of the IN2/IN1 for the dither lock error point showing 600 Hz UGF
  • HiResPZTDither_sweep: Sweep of the PZT dither input compared to the PDH error signal. I restarted the front end before the sweep was finished accounting for the blip.
  • HiResPZTDither_sweep2: Finish of the PZT dither sweep


More will be posted later.
Attachment 1: 071103_DitherLock_sweep.png  52 kB  | Hide | Hide all
071103_DitherLock_sweep.png
Attachment 2: 071103_DitherLock_sweep.pdf  11 kB  | Hide | Hide all
071103_DitherLock_sweep.pdf
Attachment 3: 071103_HiResPZTDither_sweep.png  72 kB  | Hide | Hide all
071103_HiResPZTDither_sweep.png
Attachment 4: 071103_HiResPZTDither_sweep.pdf  50 kB  | Hide | Hide all
071103_HiResPZTDither_sweep.pdf
Attachment 5: 071103_HiResPZTDither_sweep2.png  78 kB  | Hide | Hide all
071103_HiResPZTDither_sweep2.png
Attachment 6: 071103_HiResPZTDither_sweep2.pdf  30 kB  | Hide | Hide all
071103_HiResPZTDither_sweep2.pdf
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