connect monitor far

[ecos]

hello

the pc makes too much noise, so i moved it in another room, so i bought a VGA cable 5 meters to connect the monitor

the problem is that now the monitor displays a bit blurry

is the cable defective or any cable that long produces such effect? is there a way to connect the monitor 5-6 meters away from the pc?

the monitor also has DVI connector

any advice? please note I really want to have totally lossless picture quality

thanks

[jagabo]

That indicates the cable doesn't have sufficient bandwidth to carry a high resolution signal 5 meters. That doesn't make it defective unless they specified that it could carry the resolution you are using. It takes a very good cable to carry, say 1920x1080 60 Hz VGA, over 5 meters.

[ecos]

can you suggest me the best? native resolution is 1600x900 75Hz
also VGA or DVI?

thanks

[jagabo]

A good quality DVI cable is a better idea.

[edDV]

can you suggest me the best? native resolution is 1600x900 75Hz
also VGA or DVI?

thanks

You should feed VGA or DVI-D at the monitor's native resolution. This may be your main problem.

VGA is capable of working 15 ft (5m) or longer but at that length a more expensive double shielded cable may be needed. VGA is analog RGB. As cables get longer there is signal attenuation and group delay (i.e. variable delay for different frequencies). All this can blur the picture.

DVI-D can also work out to 15 ft (5m) or longer. Length dependent errors cause pixelation in digital signals. In the worse case the monitor may not lock at all. This is seldom an issue at 5m.

[edDV]

...native resolution is 1600x900 75Hz

Is this a CRT monitor? 75Hz is unusual for an LCD.

If you are in NTSC/ATSC land, better to use 59.94 or 119.88 Hz.

[ecos]

it's LCD
WinXP properties say 60Hz, while ATI's Catalyst(TM) says "maximum 75Hz"

is there any indication on the cable that says how much resolution it can take? because I think all VGA cables support at least 1920x... resolution, so there must be other parameters that interfere with picture quality
I don't want to buy an 8 meters (this is the length I need) cable and give 50 USD and not have the best quality (the quality of the origical cable that was shipped with the monitor)

can you advice me about the exact characteristics of the cable I should buy?

PS: as for DVI, any loss of quality would cause dead pixels if I get it right? or pixelation (mean not smooth borders) ? again, how can I secure the best quality?

[jagabo]

is there any indication on the cable that says how much resolution it can take? because I think all VGA cables support at least 1920x... resolution

No. Some VGA cables support as little as 640x480 at 60 Hz. The problem with analog video is that any particular cable has a "bandwidth", the maximum frequency it can carry without signal degradation. When you exceed that frequency the video will get blurry. The longer a cable is the better it has to be designed and manufactured to carry high frequencies.

http://electronicdesign.com/article/digital/calculating-video-bandwidth-for-vga-systems34510.aspx

Digital signals have the same bandwidth problems but the failure mode is different. Rather than getting blurry as you force higher bandwidth signals through it you get obvious sparkling pixels and then total failure. The transition from a few small errors to total failure is very sharp, so you basically have a cable the works perfectly or not at all.

http://www.monoprice.com/products/product.asp?c_id=102&cp_id=10209&cs_id=1020901&p_id=...seq=1&format=2

[edDV]

This DVI-D cable (or similar) should work. These are thicker 24 guage, double shielded, high bandwidth.
http://www.monoprice.com/products/product.asp?c_id=102&cp_id=10209&cs_id=1020901&p_id=...seq=1&format=2

If you'd rather use VGA,
http://www.monoprice.com/products/product.asp?c_id=102&cp_id=10201&cs_id=1020101&p_id=...seq=1&format=2

By DVI pixels I mean pixel size sparkles caused by monitor synchronization failure.


Hmm, didn't see Jagabo had posted.

Blue Jeans Cable has lots of information and is the next step up in quality.
http://www.bluejeanscable.com/store/hdmi-dvi-cables/
http://www.bluejeanscable.com/store/dvi-cables/index.htm

[jagabo]

Lol