[time-nuts] Measuring ADEV for a beginner

Anders Wallin anders.e.e.wallin at gmail.com
Sat Nov 1 11:42:30 EDT 2014

what you want to measure is a time-series of either frequency data or phase
the simplest possible case for a beginner would be to have two clocks with
1-PPS (one pulse per second) outputs, and connect one clock to the
start-input and the other to the stop-input of a time-interval counter. If
you measure phase, keep the time-interval number to a 5...6 digit number
and you don't have to worry too much about the internal time-base of the

On Sat, Nov 1, 2014 at 3:29 PM, Anthony Roby <aroby at antamy.com> wrote:

> I've been reading a lot about ADEV and following the threads on the list,
> particularly Karen's in-flight thread. What I haven't come across is a
> simple explanation of the basic setup required to go about collecting the
> data.  John Miles referenced this page http://www.ke5fx.com/tpll.htm, and
> the simple setup at the bottom of the page looks like a reasonable place to
> start.  Seems that I'd need to acquire a phase detector and build or buy
> some filters and the amp.  I can probably figure that out, but how do I get
> the data into a PC?  Is there a basic hardware and software setup that
> someone could point me to or recommend?
> Thanks
> Anthony
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