|Re: Spectrum of a Modem Signal|
|Robert Bonomi (firstname.lastname@example.org)|
Wed, 10 May 2006 22:06:23 -0000
In article <email@example.com>, <firstname.lastname@example.org>|
> If I plot the spectrum of a short modem signal, what should I expect
authoritative answer: "It depends."
On a WHOLE lot of things you didn't bother to mention.
2-wire vs 4-wire. (i.e. dialup vs. lease-line.)
FDX or HDX (two modems talking *simultaneously* to each other, or *one*
Modulation methodology (e.g. FSK, QAM, PEP, PFSK, etc.)
Modulation 'protocol' (e.g. Bell 202T, Bell 208A, V.42bis, V90, etc.)
And the *actual*data* being transmitted at the time.
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