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Message ID: 1037     Entry time: Wed Oct 8 23:18:23 2008
Author: Yoichi 
Type: Update 
Category: PSL 
Subject: Correlation between the Sorensen switching noise and the FSS error signal 
I took some spectra and coherence function of the FSS error signal and the +24V Sorensen power line.
The first plot shows spectra of the two signals. Looks like Sorensen is not responsible for most of the lines
in the FSS error signal.
The coherence function between the two signals supports it (second plot).
Slight coherence can be seen at 23kHz and 98.4kHz but not significant.

I will check the coherence of the power line with the ISS signal next.
Attachment 1: PowerLineSpe.png  90 kB  | Hide | Hide all
PowerLineSpe.png
Attachment 2: Coherence.png  36 kB  | Hide | Hide all
Coherence.png
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