Personal computing discussed

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Vrock
Gerbil God
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Wed Dec 05, 2007 3:24 pm

SpotTheCat wrote:
Vrock wrote:
SpotTheCat wrote:
In my understanding of EE, you can't modulate a purely digital signal through EM waves. Neither antenna will work well because of the discontinuity of the signal.
So....how's it transported then?
like this

Apparently it uses 10% of the energy NTSC does for a given coverage area.
So the answer to this question:

Vrock wrote:
Is it a digital stream modulated into an analog carrier (like how Dolby Digital worked on Laserdisc), or is it pure digital?


is the former.
I'm not altogether on anyone's side, because no one is altogether on my side.
 
SlyFerret
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Wed Dec 05, 2007 3:53 pm

There are of course more ways to modulate a digital signal. I think the types that my friend was trying to explain to me were QAM and QPSK.

That was a great explaination of the 8-VSB modulation.

Thanks!

-SF
"Had this been an actual emergency, we would have fled in terror, and you would not have been notified."

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