opaqueice;230242 Wrote: > Benchmark has graphs posted on their website plotting THD+N as a > function of input jitter. It's basically flat, which confirms a > specific version of their claim of jitter immunity. > > Is their data fabricated? Or are they measuring the wrong thing, as > Patrick Dixon was claiming? I don't see how jitter induced by the > input could fail to show up in a THD+N measurement, but maybe someone > can explain what I'm missing. I don't have time to find those graphs > now, but I remember that the measurement was extremely sensitive and > the noise floor very low.
THD+N is an extremely poor metric of jitter. There is no harmonic component to speak of, and any change in the noise floor is pretty small as a percentage of total N. After the DAC, jitter is most easily observed as sidebands around a high frequency, eg 10KHz stimulus. This is not to say that the Benchmark is not immune to jitter, only that THD+N vs input jitter is a poor metric. In fact the ASRC does make it quite unaffected by input jitter, although personally I prefer to avoid the problem entirely by not using s/pdif to transmit the clock. -- seanadams ------------------------------------------------------------------------ seanadams's Profile: http://forums.slimdevices.com/member.php?userid=3 View this thread: http://forums.slimdevices.com/showthread.php?t=38637 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
