opaqueice;197445 Wrote: > Why do you say so? > > What I was taught, and I think this is standard, was that only when the > length of a cable was of order or longer than the wavelength of the > signal did it need to be treated as a transmission line. Of all audio > cables digital interconnects are the only ones anywhere close to this, > and even then it's still a factor of 50 or so for a meter-long cable > transmitting a 5MHz S/PDIF signal. So if we're concerned about very > small effects, such as jitter, maybe we do need to worry about this, > but we'd better be catious applying formulas from transmission line > theory here - other effects may be more important.
Point taken. I have had problems with SPDIF locking on over fairly short runs just because I added a coupler in the middle. Remove the coupler and problem gone. The RCA couplers are pretty bad impedance wise and always assumed this type of problem was due to ringing caused by these bumps. But never tried to measure it or anything. The cables were all 75ohm but the RCA connectors were who knows what. -- mswlogo ------------------------------------------------------------------------ mswlogo's Profile: http://forums.slimdevices.com/member.php?userid=9090 View this thread: http://forums.slimdevices.com/showthread.php?t=34406 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
