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40m Log |
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Mon Mar 27 20:41:21 2017, rana, gautam, Update, PSL, PMC DAQ assay for feed-forward integration  
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Wed Mar 29 11:41:19 2017, gautam, Update, PSL, PMC DAQ assay for feed-forward integration  
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Thu Mar 30 00:16:09 2017, gautam, Update, PSL, PSL NPRO PZT calibration
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Mon Apr 3 17:25:13 2017, gautam, Update, PSL, PSL NPRO PZT calibration 
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Tue Apr 4 17:27:58 2017, rana, Update, PSL, PSL NPRO PZT calibration
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Thu Mar 30 18:11:01 2017, rana, Update, PSL, PMC DAQ assay for feed-forward integration
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Mon Apr 3 23:07:09 2017, gautam, Update, PSL, PMC DAQ assay for feed-forward integration
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Tue Apr 11 00:38:37 2017, gautam, Update, PSL, PMC demod moved off servo board
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Wed Apr 12 00:36:53 2017, gautam, Update, PSL, PMC demod moved off servo board 
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Tue Apr 18 01:01:03 2017, gautam, Update, PSL, PMC OLTF measured, DAQ channels calibrated 
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Tue Apr 18 16:10:00 2017, gautam, Update, PSL, PMC OLTF measured, DAQ channels calibrated
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Tue Apr 18 23:37:15 2017, rana, Update, PSL, PMC OLTF measured, DAQ channels calibrated
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Wed Apr 19 15:13:30 2017, gautam, Update, PSL, PMC/MCL multicoherence
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Message ID: 12944
Entry time: Tue Apr 18 01:01:03 2017
In reply to: 12940
Reply to this: 12945
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Author: |
gautam |
Type: |
Update |
Category: |
PSL |
Subject: |
PMC OLTF measured, DAQ channels calibrated |
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Quick entry, details to follow in the AM tomorrow.
- I calibrated the PMC DAQ channels into physical units - there now exists in the filter modules cts2m and cts2Hz filter modules, though of course only one must be used at a time
- Finally measured the PMC OLTF, after moving the PMC PDH error signal demodulation off the servo board - I used the same procedure as Koji when he made the modifications to the PMC servo board, I will put up the algebra here tomorrow. Turns out the previously nominal servo gain of +10dB on the MEDM sliders was a little low, the new nominal gain is +20dB, and has been updated on the MEDM screen.
ToDo:
Put up the modified schematic on the 40m DCC tree Done April 18 10pm
- Check calibration by comparing inferred PMC cavity displacement from error point and control point spectra, using the measured OLTF
- Finish up looking at multicoherence with MCL and various witness channel combinations

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