[time-nuts] Phase noise and geomagnetism

Brooke Clarke brooke at pacific.net
Mon Apr 28 22:22:33 UTC 2014

Hi Antonio:

There's a sheet metal bender up the road from me and one of their customers was HP.  The metal had special magnetic 
properties and was used to shield an HP oscillator, don't remember which one, but maybe one of the Cs units.  So for 
that unit a change in the very small Earth's magnetic filed would not make much difference.

Have Fun,

Brooke Clarke

iovane at inwind.it wrote:
> As our geomagnetic field gets quite noisy during geomagnetic storms (which are connected to solar activity), I was wondering if this could affect phase noise of oscillators. I see that theoretically it could. Has anybody ever measured phase noise increments which could be explained this way?Antonio I8IOV
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