DeVerm;343599 Wrote: > Ah, it's called "edge triggering". Edge triggered synchronous > transmission through fiber is a very solid mechanism and all that > distortion on scopes I saw in an earlier thread isn't gonna fool it. If > triggered on the rising flank, a spike/surge just before the real flank > will cause a false trigger but how that would occur in a fiber-optic > cable is beyond me so I assume it can't happen.
I might be misunderstanding you, but it sounds like you're missing the point. The issue isn't missed or false triggers - those basically never happen under reasonable (audio) circumstances. S/PDIF is easily capable of transmitting bit-perfect information; that's been tested many times. The issue is at what instant precisely the circuit decides the edge has arrived. If the signal were perfectly square and even, those instants would be perfectly evenly spaced in time. Since instead the edges are rounded off a bit, those times are smeared out - they don't occur at perfectly even intervals. The difference between when they should occur and when they actually occur is called jitter, and when jittered times are then used as a clock for the DAC the jitter distorts the resulting waveform. -- opaqueice ------------------------------------------------------------------------ opaqueice's Profile: http://forums.slimdevices.com/member.php?userid=4234 View this thread: http://forums.slimdevices.com/showthread.php?t=52817 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
