Cingular cell phone service - Re: AM electromagnetic waves: 20 KHz modulation frequency on an

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Re: AM electromagnetic waves: 20 KHz modulation frequency on an

Don Bowey

2007-06-30, 10:33 pm

On 6/30/07 7:01 PM, in article
1183255299.200569.150130@j4g2000prf.googlegroups.com, "Radium"
<glucegen1@gmail.com> wrote:

> On Jun 30, 3:46 pm, Jeff Liebermann <j...@cruzio.com> wrote:
>
>
> In AM, isn't the carrier the signal which always maintains a constant
> frequency and only varies by amplitude?

No! The Carrier amplitude is constant. Sidebands are generated in the
modulation process. At 100% modulation, each sideband has 25% as much power
as the Carrier. The sideband signals vary in amplitude, following the
modulation signal.

>
> If a carrier signal varies by anything other than just amplitude, then
> it isn't AM. Right?
>

You repeat yourself, and the answer is still no.

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