On Tue, 2006-03-21 at 20:05 +0100, Michele Carla` wrote:
> On Tue, 2006-03-21 at 10:42 -0500, Jack Carroll wrote:
> > On Tue, Mar 21, 2006 at 05:23:32AM -0700, James Richard Tyrer wrote:
> > > Dieter wrote:
> > >
> > > <SNIP>
> > >
> > > >Hopefully the DVI will turn out to be good enough. I like coax as much
> > > >as the next guy, but I assume that whatever chip the signals come out
> > > >of doesn't have a coax connector on the side.
> > >
> > > Answers.com states that the bandwidth is 400 MHz without any citation:
> > >
> > > http://www.answers.com/topic/digital-visual-interface
> > >
> > > AMP data sheets indicate that the rise time would be 840 ps which would
> > > be 416.6 MHz. That is 700 ps rating for the connector and 140 ps
> > > degradation for a cable.
> > >
> > > So the 400 MHz figure may have validity.
> >
> > This sounds like the DVI analog pins are good enough for now, though
> > the dotclock rate is approaching its limits. It should be just about able
> > to handle the 330 MHz rate, and that would meet the requirement for 75 ohm
> > lines on OGD1. As far as hydra cables go, SI carries them.
> > In summary: since OGD1 can't accommodate multiple 75 ohm connectors,
> > DVI still likes the choice that will suit the most users directly, and
> > adapter cables are commercially available for everybody else.
> > Since the 500 MHz signals are going to 50 ohm coax anyway, DVI isn't
> > an issue there. The 13W3 probably isn't suitable either, because it's 75
> > ohms.
>
> If I understand correctly there are also 50 Ohm 13w3 connectors:
> http://www.hochien.com/coax-solder.htm (for example)
VSWR: Less than 1.3 - 1.0 up to 500 MHZ ....mmhh not so good )-:
>
--
Pluralitas non est ponenda sine neccesitate
Frustra fit per plura quod potest fieri per pauciora
Entia non sunt multiplicanda praeter necessitatem
Occam's Razor
MiChele Carla` aKa Goldfinger <[EMAIL PROTECTED]>
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