It doesn't matter how fast the CPU clock rate is because you are not dealing with a simple rate monotonicity. There are far too many inconstancies in a PC to properly apply simple O(n) algorithms.
>Your reply ignores the simple fact that it _does_ track within a couple of microseconds, as long as the processor is busy. The PC is _not_ the clock source, a >PPS signal derived from GPS is. A PC is perfectly capable of 10 us accuracy. Even slower processors are capable of significantly better accuracy In this you are exposing a complex detail in the sampling conditions. It is quite obvious that the experiment (The hardware,software, and figures) do not exhibit the precise control that you require. The more you focus, the more problems you will find. Likewise, the mixed results you find from one experiment to another, strengthens the argument for lack of precision in the control. Whatever changes you make to increase precision are not likely to apply to any one else. Those who do not see a problem are simply not objective in regards to the scientific method. Just cargo cult science. Steve On Wed, Apr 4, 2012 at 11:42 PM, Mike S <[email protected]> wrote: > On 4/4/2012 10:41 PM, Steve . wrote: > >> breaking the 1pps down as far as 10micro seconds,The >> most obviously problem is that you are trying to use an inaccurate clock >> source(the pc) >> > > Your reply ignores the simple fact that it _does_ track within a couple of > microseconds, as long as the processor is busy. The PC is _not_ the clock > source, a PPS signal derived from GPS is. A PC is perfectly capable of 10 > us accuracy. Even slower processors are capable of significantly better > accuracy - http://www.febo.com/pages/soekris/ . > > > Trying to tweak a PC to get 10microseconds (nyquist, 5microseconds max) >> > > ??? > > Maybe your PC runs in MHz, but mine runs in GHz. Are you confusing us with > ns? > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
