[time-nuts] evaluating an oscillator with the allan deviation

[Adrian Godwin]

On Fri, Feb 8, 2019 at 1:02 PM Tom Van Baak <tvb at leapsecond.com> wrote:

>
> Thanks for the raw data. Attached is Folkert-02.png which is the ADEV from
> column 1 (your function generator vs. Arduino) and column 2 (your Adafruit
> 1PPS vs. Arduino). In this case it's quite clear that the Arduino crystal
> is much better than your function generator. In other words, you probably
> didn't need the Adafruit GPS. But you can't know that until you make the
> measurement.
>
>
But the function generator, too, is based on an arduino. Maybe one just
happens to have a better oscillator than the other at that temperature. It
would be interesting to swap them over and see if the function generator
improves.