Re: Weird behaviour of the analog signal source (was: Re: How ensure consistency with timing signals)

2020-03-03 Thread Sylvain Munaut
Hi, > I am by no means an expert on this but just for my understanding I would be > curious: > > 1.) I still do not understand why for 1 Hz at 5MSps I can get a period that's > "500578.5" on average. The frequency error is a whopping 0.1158%! > ((5005789.5-500)/500*100). Huge. That's b

Re: Weird behaviour of the analog signal source (was: Re: How ensure consistency with timing signals)

2020-03-03 Thread Lukas Haase
Hi Sylvain, Thank you very much for your answer. Much appreciated! > Von: "Sylvain Munaut" <246...@gmail.com> > > Hi, > > > How can (or better: *should*) a fully digital signal source have phase > > noise? > > Limited precision arithmetic > > > > Also, for 1Hz at 5MSps I always get either 500578

Re: Weird behaviour of the analog signal source (was: Re: How ensure consistency with timing signals)

2020-03-03 Thread Sylvain Munaut
Hi, > How can (or better: *should*) a fully digital signal source have phase noise? Limited precision arithmetic > Also, for 1Hz at 5MSps I always get either 5005789 or 5005790 samples > (instead of 500) ... this is fairly deterministic. That's because the signal source works with phase i

Weird behaviour of the analog signal source (was: Re: How ensure consistency with timing signals)

2020-03-02 Thread Lukas Haase
Hi Marcus, How can (or better: *should*) a fully digital signal source have phase noise? Also, for 1Hz at 5MSps I always get either 5005789 or 5005790 samples (instead of 500) ... this is fairly deterministic. Experimenting a bit, I see the weirdest behaviour of the analog signal source. In