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Entry  Sat Jul 24 14:03:19 2010, Alberto, Update, Electronics, FSS Oscilaltor Phase Noise Measurement FSScrystalPhaseNoiseHigherGain.pdf
    Reply  Sat Jul 24 14:27:36 2010, rana, Update, Electronics, FSS Oscilaltor Phase Noise Measurement 
Message ID: 3285     Entry time: Sat Jul 24 14:03:19 2010     Reply to this: 3286
Author: Alberto 
Type: Update 
Category: Electronics 
Subject: FSS Oscilaltor Phase Noise Measurement 

[Rana, Alberto]

Today we measured the phase noise of the oscillator used for the FSS.

The source is a Wenzel crystal at about 21.5MHz that Peter Kalmus built some time ago.

We basically used the same technique that Frank and Megan have been using lately to measure the Marconi's phase noise.

Today we just did a quick measurement but today next week we are going to repeat it more carefully.

Attached is a plot that shows the measurement calibrated for a UGF at about 60 Hz. The noise is compared to that specified by Wenzel for their crystal.

The noise is bigger than that of the MArconi alone locked to the Rubidium standard (see elog entry). We don't know the reason for sure yet.

We'll get back to this problem next week.

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FSScrystalPhaseNoiseHigherGain.pdf
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