Suppose you have a perfect, ideal clock that puts out 'convert' pulses at an exact rate is used to strobe a high precision A/D.
Now suppose you add jitter to that perfect clock so that the rate stays the same but time interval between successive pulses varies randomly between P(1-x) and P(1+x). How big would x have to be before anyone could detect any difference in the sound? I have my opinion, but what is yours and why? -John =============== > On Mon, 7 May 2012 10:02:25 -0600 > Tom Knox <act...@hotmail.com> wrote: > >> >> Actually the numbers are quite real, play with the math, a small amount >> of jitter in a DAC (X) can have a large difference (Y) when sampling a >> complex wave form especially in the audiophile world where the sound of >> 24bit dac 16,777,216 discrete levels is clearly superior to older >> 16 bit dac 65,536 possible levels in 44.1 KHz to 192 KHz formats. > > Yes, i know that jitter is a pain when it comes to ADCs, but keep > in mind that your audio ADC does have a jitter of a couple > 100ps itself. If it's a high end ADC that is. The standard ADCs are > usually > in the ns range. For a normal 10MHz XO you measure the jitter in in the > lower > 10ps at most, a good one at lower than 1ps cycle-to-cycle. Of course, you > have > to keep the clock signal clean of any disturbance that might add > modulations > to it. But that's a matter of keeping the power supply clean and having > the > signal shielded. It's not an inherent property of an Rb to have low > jitter. > And as we all know from the recent hype on the FE-5860As and the > following measurements, not all Rb's are low jitter. > > Attila Kinali > > -- > Why does it take years to find the answers to > the questions one should have asked long ago? > > _______________________________________________ > 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. > > _______________________________________________ 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.