Re: Cable direction my oh my

[SoundFNR@aol.com]

> While the following quote is not about analog signals on a cable, this
>  stereophile article shows measurable differences in jitter from an
>  spdif source depending on the direction of the cable:
>  
>  http://www.stereophile.com/printarchives.cgi?368
>  
>  'Changing the direction of the digital interconnect between the
>  transport and the jitter analyzer.=20

Couldn't resist chipping in on this one, 
I looked up that link, very interesting and informative.
...but it goes on to say

"With a good source, cable direction didn't make a difference in the 
measurable jitter (fig.10). This suggests that the SV-3700—or any 
poor-quality transmitter—reacts with the cable's impedance to create 
jitter-inducing reflections in the interface. The directionality was 
probably 
caused by differences in the way the two RCA plugs were soldered to the 
cable; any bumps or discontinuities in the solder or RCA plug will cause a 
change in the characteristic impedance, which will cause higher-amplitude 
reflections in one direction than in the other. These reflections set up 
dynamically changing standing waves in the interface, introducing jitter 
in 
the embedded clock. "

which means that they don't think it matters which way the cable goes!

One directional cables?  Well I'll believe it just as soon as I hear it.


andy butler