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Reports until 21:08, Friday 07 March 2014
H1 ISC
alexan.staley@LIGO.ORG - posted 21:08, Friday 07 March 2014 (10628)
COMM PLL Noise

I took another amplitude spectrum of the noise out of the PFD IMON in the COMM PLL to VCO loop. The PLL was locked; however we had not handed off. The two compensation filters were on and the input gain was 27dB. I have attached the data. The flatness which we were puzzled by last time has disappeared...

I did also see the traveling noise that seems to come from electronics cross-talk. This moving peak was about 3kHz wide (approzimately 12 degrees).

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