Hi, Due to hobby-budget limits I build a very simple function generator from an arduino and a dac ( https://vanheusden.com/Arduino/funcgen/ ). I would like to evaluate its performance.
To do so, I setup another arduino which is connected to a pps signal from a gps. This arduino then subtracts the timestamp from when the DUT pulses (DUT = function generator) and when the GPS/PPS pulses ( https://vanheusden.com/Arduino/funcgen/osciltest.ino ). The result of this is plotted using https://github.com/aewallin/allantools/ : https://vanheusden.com/Arduino/funcgen/funcgen-allandev.svg I'm far from an expert but this graph looks a bit too good to be true. Can anyone spot the mistake I make in the process? regards Folkert van Heusden -- ---------------------------------------------------------------------- Phone: +31-6-41278122, PGP-key: 1F28D8AE, www.vanheusden.com _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
