Hi The rubidium should tune over a +/- 1x10^-9 range. A nanosecond per second isn't all that hard to spot. At 10 MHz you'll do a full 360 in 100 seconds.
Bob On May 20, 2010, at 5:57 PM, WarrenS wrote: > > 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 them. > > ws > > **************** > > 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. > > http://www.makerfaire.com/ > > Leigh/WA5ZNU > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.