[time-nuts] Thunderbolt oscillator temperature sensitivity

[Mark Sims]

Ever wonder if a +/- .01C temperature cycle would have any measurable effect on the Thunderbolt oscillator?   Well,  wonder no more...   

Attached is a plot (in red) of the fast Fourier transform of the Tbolt oscillator data.  The temperature was cycling +/- .01C with a period of 635.6 seconds.  That big red spike in the FFT data (just under the ':' in the Filter: in the plot) is also at 635.6 seconds.

Ignore the OSC tempco value shown since that measurement needs to be done with the oscillator undisciplined and the temperature moving...  the true value is around 1/10th that. 		 	   		  
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