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Entry  Tue Jan 24 18:11:13 2012, kiwamu, Update, Green Locking, Y arm ALS noise budget Yarm_ALS_2012Jan19.pngnewservo.png
    Reply  Wed Jan 25 02:59:46 2012, kiwamu, Update, Green Locking, Y arm ALS noise budget 
Message ID: 6221     Entry time: Wed Jan 25 02:59:46 2012     In reply to: 6220
Author: kiwamu 
Type: Update 
Category: Green Locking 
Subject: Y arm ALS noise budget 

Surprisingly increasing the gain of the whitening filter didn't improve the noise curve.

It suggests that the ADC noise is not the limiting factor below 10 Hz.

Quote from #6220

Though, it turned out that the MFD's ADC is now limiting the noise in a frequency band of 200 mHz - 5 Hz.

So tonight I will increase the gain of the whitening filter to push down the ADC noise more.

 

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