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General discussion

connecting dvi ports using vga cable and vga to dvi adapters

Aug 11, 2010 2:51AM PDT

Computer: dvi D (24 + 1 pins) port.
Display: dvi I (24 + 5 pins) port.

Is this possible:
Connecting display and computer using 2 dvi D (24 + 1 pins) to vga adapters like this one:
http://www.gttkc.com/shop/index.php?main_page=product_info&cPath=83&products_id=554
And using a common vga cable like this one:
http://www.gttkc.com/shop/index.php?main_page=product_info&cPath=83&products_id=554

If the above connections runs, then I know it will be a digital
connections since a dvi D computer port only supports a digital signal.

What if the computer port is a dvi I port, will the connection then
still be a digital connection?

Remark: A dvi I port supports both digital and analog signals.

Thanks.

Discussion is locked

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This one is easy.
Aug 11, 2010 3:15AM PDT

As VGA is not a digital signal and your question is "will the connection then still be a digital connection?" when using said adapters.

The answer is no.
Bob

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who is bob?
Aug 11, 2010 6:17AM PDT

It seems bob is often misunderstanding questions.

I clearly wrote:

The computer port is: DVI D (24 +1pins), THAT IS AN DIGITAL PORT.
Receiving port is a display DVI I (24 + 5pins), to my knowledge a
port supporting DIGITAL AND ANALOG SIGNALS.
The only VGA quistion is: Can a VGA cable transfer the DIGITAL SIGNAL
if the VGA cable is connected to computer and display via "DVI D TO
VGA ADAPTERS" or not?

Bob, please don't answer if you don't read the question carefully,
or you don't understand the quistion.

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So you want the following connection.
Aug 11, 2010 6:22AM PDT

Computer - DVI port- VGA-converter - VGA cable - VGA converter - DVI port - monitor.
And you want to now if this can be considered a digital connection.

I don't think so, but it might depend on your definition of 'digital connection'. Why such a complicated way? And what does it matter how it's called?

Kees

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that's why
Aug 11, 2010 6:31AM PDT

It's not a vga converter, it's an adapter, at least I believe so.
Go to the link and see for your self.

If the descreibed connection method is working, I only need to buy
an adapter, else I have to buy a cable.

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Re: adapter
Aug 11, 2010 6:39AM PDT

Converter or adapter, that's just a word. And you didn't ask if it would work, you ask how it would be called ("will it still be a digital connection?").

Now find a local computer shop that let's you try such an adapter and exchange for a cable if it doesn't work (assuming the adapter is cheaper than the cable, or the whole operation would defeat its purpose).

Kees

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not all semantic.
Aug 11, 2010 7:10AM PDT

"Will it still be" or "Will it work" is semantic.

"Adapter" or "converter" is not semantic. And adapter is mostly
refered to, as a passive device. It doesn't do anything, just lets
something pass through. And converter is active, fx makes calculations
uses energy etc.

Maybe for some reason someone had tried this possibility.
If you don't know the answer it's ok, then just don't give an answer.

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Re: semantics
Aug 11, 2010 7:22AM PDT

It's getting off-topic, but I have to say I don't agree.

1. For example, a laptop power adapter converts 110V AC to 19V DC and it uses a lot of energy to do so (it becomes warm). So it's a converter that's called an adapter.

2. I agree with Bob that is this should be considered an analog connection (because part of it is analog) not a digital one. But it might very well work, in the sense that you get a satisfying image on the screen. So "is it digital" and "does it work" have different answers, so must be different questions.

Maybe you're lucky, and somebody can tell you if it really works. If nobody comes up, you can only guess and try.

Kees

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1 and 2
Aug 11, 2010 8:21AM PDT

1) power supply adapter isn't a good ex. It doesn't execute instructions or programmed calculations. There is a heat lost,
which is energy, during the process, but is that due to an active
programmed procedure for electronic signals? No.
2) No part of the connection is analog, since the computer port is a
dvi D port and signals are passing through an adapter. The question is, can the digital signal be carried through
a vga cable. I don't know, it has fewer pins, but maybe some are blank
in the adapter. But if the adapter can't carry digital signals, then
what is it made for? That I don't understand.
How can I explain my last question, the one you are focusing on.
I meant in the case were both computer and display ports are dvi I
ports. To my knowledge, then both sending and receiving ports can
carry digital and analog signals. My question was then, can the system
, using the described adapter, somehow choose to use and analog signal. I would say no, because the adapter's dvi D connector should
only be able to let digital signals pass through. Probaly only if
someone has tried will know if it runs.

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No it will not work.
Aug 11, 2010 7:27AM PDT

The adapters will use the analog pins of the DVI port and thus not be digital.

Sorry you took offense to the short answer. Here's my thought here. Why are you buying or doing business with folk that won't answer your question?
Bob

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If you are into electronics. Here's more.
Aug 11, 2010 7:36AM PDT
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don't be
Aug 11, 2010 9:08AM PDT

don't be.
I simply can't look through the ports.
You say, that the adapter lets only the analog part of the signal pass.
And that sounds logical dealing with the dvi I computer port. Again it
supports digital and analog signals.
But I think you are wrong when the adapter is connected to a dvi D
computer port. Then only a digital or none is getting into the vga cable. See wikipedia about dvi ports.
I just tried this:
My display has a dvi I and a vga port.
Connecting vga display to vga computer port runs. No surprise.
If I mount the adapter to the computer dvi D port, and connects
the display via an vga cable to the display's vga port. The
display doesn't run. Then when can the dvi to vga adapter be used?
Are there displays that are able to receive digital signals via
their vga ports? Strange.
I will read your links later.
Thanks.

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Then when can the dvi to vga adapter be used?
Aug 11, 2010 11:05AM PDT

When the link is analog. It's that simple. I wonder too why simple answers won't do here.

In fact, why are you buying things from folk that won't warn you it won't work?
Bob