Article View: chi.media
Article #512Re: That digital stuff
From: clifto
Date: Tue, 24 Jun 2008 02:12
Date: Tue, 24 Jun 2008 02:12
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2241 bytes
Ron T. wrote:
> The station engineer, stating that the digital signal could "theoretically"
> go farther, caught me off guard. If you have, say, a 180 mhz signal at 10kw,
> it doesn't matter if it's carrying an analog or digital content, it's going
> to be the same damn signal strength under whatever conditions at whatever
> distance.
What DOES matter, as you perceive, is the sensitivity of the encoding and
decoding process to noise. You can make out an analog signal that is FAR
lower in signal-to-noise ratio than is possible with a digital signal. So
if the signal is the same strength, but too far down in the noise floor to
detect, the analog signal gets viewed and the digital isn't there, for all
practical purposes.
--
Britney Spears' Guide to Semiconductor Physics
<http://britneyspears.ac/lasers.htm>
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