[mythtv-users] HDMI or DVI
mikep at randomtraveller.org.uk
Fri Sep 14 09:36:01 UTC 2007
Michael T. Dean wrote:
> On 09/13/2007 04:38 PM, Andrew Burgess wrote:
>> This can work to your advantage if you need a really long out of spec
>> cable. VGA at 100 feet is fuzzy but usable. Most HDMI/DVI is blank.
> Not to mention the fact that VGA uses coaxial cables and
> DVI/HDMI/DisplayPort don't (but should have), so they tend to have
> issues controlling impedance--especially on long runs. Basically, these
> new digital connections were designed for short runs, only.
The same holds true for analog. If you're running a 100 foot VGA link, the line
drivers on each wire of that cable must be near melting point. VGA cables are
usually 1 metre/yard or so. You can get away with 2m/3m extenders, but the
electronics either end will find cable longer than that much harder going (=
much shorter working life).
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