You'd have to seriously divide down the output from the 10MHz OCXO if you were going to use it as an interrupt. Maybe to divide by 10,000? and even at the higher clock rate you'd still have poor resolution.
I image each interrupt handler would sample some internal counter and the background task would look at the delta between the two and adjust the DAC to drive the OCXO to close the difference. The resolution would be (maybe?) a "handful" of clock cycles. Given enough time, say a 1000 second period it might wrk well enough. I can't know without doing a more detailed design On Thu, Dec 6, 2012 at 1:59 AM, Don Latham <d...@montana.com> wrote: > Chris: > > > The question I have again is about a simple phase detector. > > I did ask if the arduino interrupt ports could be used as a phase > detector; one on the GPS and one on the OXCO. Too much jitter? If the 12 > MHz clock is too slow, would an 80 MHz clock ARM arduino style processor > work? I'm simply too new at this to decide. > > Don > > -- > "Neither the voice of authority nor the weight of reason and argument > are as significant as experiment, for thence comes quiet to the mind." > De Erroribus Medicorum, R. Bacon, 13th century. > "If you don't know what it is, don't poke it." > Ghost in the Shell > > > Dr. Don Latham AJ7LL > Six Mile Systems LLP > 17850 Six Mile Road > POB 134 > Huson, MT, 59846 > VOX 406-626-4304 > www.lightningforensics.com > www.sixmilesystems.com > > > > _______________________________________________ > 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. > -- Chris Albertson Redondo Beach, California _______________________________________________ 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.
