Re: Cable direction my ass

[Bret <echoplex@yahoo.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. 

This phenomenon was easily repeatable: put the cable in one direction
and read the RMS jitter voltage, then reverse the cable direction and
watch the RMS jitter voltage drop. Although I'd heard differences in
digital-cable directionality, I was surprised the difference in jitter
was so easily measurable—and that the jitter difference was nearly
double. 

To confirm this phenomenon, I repeated the test five times each on
three different digital interconnects. One was a generic audio cable,
the other two were Mod Squad Wonder Link and Aural Symphonics Digital
Standard, both highly regarded cables specifically designed for digital
transmission. The generic cable wasn't directional: it produced the
same high jitter in either direction. But both the Wonder Link and the
Aural Symphonics had lower jitter levels overall, but different jitter
levels depending on their direction. Moreover, the generic cable had
higher jitter than either of the two premium cables—even in the
latters' "high-jitter" direction. '

bret

--- Mark Sottilaro <sine@zerocrossing.net> wrote:
> I didn't want to say anything... how can you say cable has a
> direction, when
> we're talking about a current that alternates?  There's impedance,
> but
> cables have little to do with that.  I challange anyone to show me
> phyiscs
> proving different.
> 
> sorry to start a cable war.
> 
> Marl
> 
> Richard Holland wrote:
> 
> > Monster cable is a scam, copper wire is copper wire is copper wire,
> wire
> > does not have a direction, that is BS cooked up by Monster cable to
> sell
> > crap to those who belive everything they see in ads.
> >
> > At 09:08 PM 3/27/02 +0000, Jon Wagner wrote:
> > >>ALL cables has a direction. Monster and a few others bother to
> mark it.
> > >
> > >???  more info please. I don't understand.
> > >Jon
> > >
> > >_________________________________________________________________
> > >Join the world's largest e-mail service with MSN Hotmail.
> > >http://www.hotmail.com
> 


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