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40m Log |
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Mon Jan 20 20:20:36 2020, gautam, Update, PSL, PMC servo checkout 
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Wed Jan 22 11:22:39 2020, gautam, Update, PSL, PMC modulation depth measurement
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Wed Jan 22 20:12:36 2020, gautam, Update, PSL, PMC demodulator electrical characterization 
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Thu Jan 23 14:37:05 2020, gautam, Update, PSL, PMC VGA chip damaged?
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Thu Jan 23 16:37:14 2020, rana, Update, PSL, PMC VGA chip damaged?
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Thu Jan 23 22:10:01 2020, gautam, Update, PSL, PMC servo pulled out
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Fri Jan 24 15:42:08 2020, gautam, Update, PSL, PMC servo restored
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Sun Jan 26 13:47:00 2020, gautam, Update, PSL, PMC servo characterization   
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Tue Jan 28 14:33:24 2020, gautam, Update, PSL, Inferred free-running frequency noise 
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Thu Jan 23 18:52:31 2020, gautam, Update, PSL, PMC RFPD characterization
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Message ID: 15152
Entry time: Fri Jan 24 15:42:08 2020
In reply to: 15149
Reply to this: 15156
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Author: |
gautam |
Type: |
Update |
Category: |
PSL |
Subject: |
PMC servo restored |
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The PMC servo was re-installed at ~345pm. HV supplies were re-energized to their nominal values. I will update the results of the investigation shortly. The new nominal PMC servo gain is +9dB.
Quote: |
While I have the board out, I'll try and do a thorough investigation of TFs and noise of the various stages. There is no light into the IFO until this is done.
I pulled the board out at 345pm after dialling down all the HV supplies in 1X1. I will reinstall it after running some tests.
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