What is anti-aliasing?

I enjoy a DLP projector that run 1024 x 768 resolution.
It look great at 800x600 but the 1024 XGA res has the anti aliasing problem.
We are running a 100' 15Pin cable from laptop to projector.
I tried a VGADA, but that did not oblige much
Should I run a cat5 and use extenders?

Answer:
I don't know what to tell you what to do but this is what Anti-Aliasing is:
Antialiasing is a software technique for diminishing jaggies - stairstep-like lines that should be smooth. Jaggies materialize because the output device, the monitor or printer, doesn't have a lofty enough resolution to represent a smooth smudge. Antialiasing reduces the prominence of jaggies by surrounding the stairsteps next to intermediate shades of gray (for gray-scaling devices) or color (for color devices). Giving the image a smoother look.
http://en.wikipedia.org/wiki/anti-aliasi...
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