[time-nuts] Thunderbolt, Rb,

Bob Camp lists at rtty.us
Thu May 20 22:05:59 UTC 2010


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.


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 at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.

More information about the time-nuts mailing list