Cingular cell phone service - Re: AM electromagnetic waves: 20 KHz modulationfrequencyonanastronomically-low carrier frequency

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Re: AM electromagnetic waves: 20 KHz modulationfrequencyonanastronomically-low carrier frequency

isw

2007-07-06, 10:33 pm

In article < 138tudplgcuuq26@corp
.supernews.com>,
Roy Lewallen <w7el@eznec.com> wrote:

> Ron Baker, Pluralitas! wrote:
>
> The two actually describe different properties, so a signal can be be
> AM, DSB, neither, or both.
>
> And here we run into some trouble between technical correctness and
> common usage.
>
> DSB stands for Double SideBand. Although I suppose an FM signal could be
> called DSB because it has two *sets* of sidebands

Um, actually, it has a lot more than that. A carrier FM modulated by a
single sine wave has an infinite number of sidebands. If the modulating
signal is more complex, then things get really complicated.

Isaac

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