[time-nuts] Thunderbolt, Rb,

WarrenS warrensjmail-one at yahoo.com
Thu May 20 21:57:12 UTC 2010

I hope it is a LONG show with a lot of patent people.
This is way above the typical WWV stuff.
Any good adjusted RB with a correctly set up Tbolt will take >2.5 hrs to do 
the 360.
Delta 1e-11 = 10,000 sec for 100 ns change.

I understand it is not what your desired goal is,
But would be much better off with a PC and Lady Heather, that way only need 
to wait a minute or less.
Maybe a better test for the O-Scope is to show the noise jitter between 



time-nuts] Thunderbolt, Rb, Scopes at SF Bay Maker Faire this weekendLeigh 
L. Klotz, Jr. WA5ZNU Leigh at WA5ZNU.org
Thu May 20 20:00:21 UTC 2010

As part of the SF Bay Area Maker Faire this weekend, I'll be showing a
Thunderbolt GPSDO and a FE-5680A Rubidium disciplined oscillator, both
connected to a $25 flea-market oscilloscope.

The demo is part of a hands-on "things to do with oscilloscopes."  In this
experiment, we'll have visitors use a stopwatch to measure how long it
takes for a 360 degree phase change, and use that to calculate the
fractional PPB difference between the two frequencies.

We'll be at the ARRL booth, which is in the Fiesta Building, near the
Tesla Stage entrance.



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