RE: DVI cabling query

["Keith Doxey" <ukha@xxxxxxxxxxx>]

Hi Paul,

the component to DVI adaptor cable will almost certainly be using the RGB
pins of the analogue VGA connection.

If you use a DVI to VGA adapter on the TV you should then be able to use a
VGA switchbox feeding the PC into one input and the component video into
the
other using a component to VGA lead (or just the RGB leads of a VGA to 5
phono/bnc lead.

HTH

Keith

> -----Original Message-----
> From: Paul Gordon [mailto:paul@xxxxxxx]
> Sent: 04 December 2006 09:26
> To: UKHA_D Group
> Subject: [ukha_d] DVI cabling query
>
>
> Possibly one for Keith?....
>
>
>
> Chaps, following on from my recent upgrade of my kitchen TV, I have a
> connector dilemma, - basically, two sources to connect to 1 input on
the
> TV...
>
>
>
> Wouldn't normally be a problem, except that the 1 connector on the TV
is
> a DVI-I, and currently both sources I have to connect to it are
analogue
> (1 PC VGA, and 1 $ky Y-Pb-Pr). The set came with a 3-phono to DVI
cable
> included to connect the component source to the input. I also have a
> VGA-DVI cable for the PC, so I can connect either one, but not both
> concurrently.
>
>
>
> I've looked at getting a DVI switchbox, but *every* one I've found
only
> switches the digital pins, and so wouldn't pass through the analogue
> signal lines.
>
>
>
> I could upgrade the PC & fit a new graphics card with DVI, but
that
> still leaves me the problem of switching between them.
>
>
>
> Then it occurred to me, the DVI-I obviously has separate analogue
&
> digital signal pins, so in theory I *should* be able to connect both
> sources at the same time and select between them using the input
> selections on the TV (instead of using an external switch) - I reckon
> all I need is a custom cable making up that connects but sources to
the
> input...
>
>
>
>                                               $ky-----3 x
phono--------
>
>
> I-----------------------------------------DVI-I ----input on TV
>
>                                              
PC-----DVI-D--------------
>
>
>
> Hope the ASCII art survives intact!
>
>
>
> Does this make sense? - sound feasible? - I *think* I would have to
> upgrade the PC to DVI-D, since if I've read the DVI connector spec
> correctly, there's only a single set of analogue RED/GREEN/BLUE input
> pins so both component video and VGA would need to use them. But if I
> change the PC to DVI, then that would use the digital pins and AFAICS
> there's no reason then that I shouldn't be able to have both
> connected...
>
>
>
> If so, I need to find somewhere who can make up such a cable for me; -
I
> don't suppose such a configuration already exists off the shelf? -
> Anyone got any suggestions who could do this for me? (Keene?
> Lectropacs?)
>
>
>
> TIA
>
>
>
> Paul G.
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
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