how long vga cable is possible

  • Thread starter Thread starter Buday Gergely
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Buday Gergely

Hi there,

how long vga cable is possible without significant loss of signal and
loss of image quality?

I'm to send my pc box into exile 'cause I want not listen to its
noise...

- Gergely
 
Buday said:
how long vga cable is possible without significant loss
of signal and loss of image quality?
Click to expand...

It depends on (in about this order):
* cable quality
* resolution (higher is tougher)
* refresh rate (ditto)
* card video amplifiers
* monitor

You can usually go 6 to 20 ft with retail cables.
Replace your entire short cable with a long one.
From 20 to 180 ft, you need high-quality low-capacitance
Click to expand...
75 ohm cables.

Beyond that (or maybe even below that, depending on
price), look at active extenders or even KVM over IP.

Fibre optic extenders also exist, but these are likely
way beyond your requirements.

Don't forget, you also need to extend your keyboard
and mouse ports, whether PS/2 or USB, and that can
be more of a challenge than remoting the graphics.
 
rjn said:
It depends on (in about this order):
* cable quality
* resolution (higher is tougher)
* refresh rate (ditto)
* card video amplifiers
* monitor

You can usually go 6 to 20 ft with retail cables.
Replace your entire short cable with a long one.

75 ohm cables.

Beyond that (or maybe even below that, depending on
price), look at active extenders or even KVM over IP.

Fibre optic extenders also exist, but these are likely
way beyond your requirements.

Don't forget, you also need to extend your keyboard
and mouse ports, whether PS/2 or USB, and that can
be more of a challenge than remoting the graphics.
Click to expand...

Personally I'd look at quieting the machine.
 
Buday Gergely said:
Hi there,

how long vga cable is possible without significant loss of signal and loss
of image quality?

I'm to send my pc box into exile 'cause I want not listen to its noise...

- Gergely
Click to expand...

Look into a class of products loosely called "KVM" (Keyboard Video
Mouse).
They supposedly buffer the 3 connections, allowing the very thing you
desire. Can't
comment about loss of quality as I never actually tried any.
Speaking of video cables only, I've seen bad reflections on setups with
no more than
a typical 1.8 to 2 meter length - the video card and monitor impedances are
just as
important as the cable quality. If either of those are suspect, getting the
best cable in
the world will not fix it.
 
Dave said:
Beyond 10 feet in length you may begin to pick up interference
Click to expand...

Using ordinary cable, sure. But if you break out the
RGBhv lines and send each via dedicated coax, like NTI
does with their "VEXT-RG11-xx"
<http://www.nti1.com/cable-custom.html>,
that's less likely.

I've not used their products, but they claim to be able
to hit 500 ft. passively with this construction.

And as I mentioned earlier, this is well beyond
the trivial extensions to PS/2 and USB. Hello keyboard.
Have you seen mouse?

NTI impairs their credibility by offering a passive USB
Style A m-to-f extension cable (in the "USBVEXT-3/6/10",
perhaps others). Violates standard. Not wise. I own such
a USB cable, and would never use it for any critical
application.
 
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