[time-nuts] time-nuts Digest, Vol 64, Issue 14

Magnus Danielson magnus at rubidium.dyndns.org
Sun Nov 8 19:13:58 UTC 2009


Dear Mark,

Mark Amos wrote:
> The when I ran these tests yesterday (measuring 182 seconds for 360 degress)
> it was with a homebrew GPSDO.  However, subsequent runs showed poor
> irreproducibility of the results indicating that the homebrew unit might not
> a very stable source - so I switched to the Trimble for succeeding
> measurements, which have been very consistent.  I may not have noticed the
> homebrew GPSDO problem if I hadn't compared it to the LPRO in these tests.
> 
> Obviously, for most of you, this is pretty basic stuff, but these "visual
> aids" are useful for me to get an intuitive feel for the underlying
> phenomena.
> 
> It will be interesting to watch the changes over time. 

Recall that 1/f types of noises does not average well over time, so 
there will be some walking around in phase. All to keep us on our toes a 
little more. It is natural of feedback oscillators.

Cheers,
Magnus



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