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) -- 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]> _______________________________________________ Open-graphics mailing list [email protected] http://lists.duskglow.com/mailman/listinfo/open-graphics List service provided by Duskglow Consulting, LLC (www.duskglow.com)
