On Jun 29, 10:10 pm, "Bob Myers" <nospample...@address.invalid> wrote:
> "Radium" <gluceg...@gmail.com> wrote in message
>
> news:1183177831.152287.69850@j4g2000prf.googlegrou ps.com...
>
> > My basic question is if I have an AM receiver which receives signals
> > on a carrier frequency of Fc, is it mathematically-possible for me to
> > receive a modulator signal -- on that station -- of a frequency higher
> > than Fc? If not, then why? If not, then how are the submarines which
> > use ELFs [Extremely Low carrier Frequencies around 3 to 30 Hz] able to
> > perform voice communications?
>
> > I just stretched the question out to astronomical extremes. I have a
> > habit of doing that.
>
> Why not simply ask the question you mean to ask, then, rather
> than the absurd numbers you put in the original version of this
> (and which you then expect everyone to work through, just to
> see what the hell you might be talking about)?
>
> The answer to the question you seem to be asking is obvious
> if you simply work through the mathematics of what is going on
> in amplitude modulation. So why not simply do that, and not
> ask such incredibly obtuse questions?
>
> One hint: the ELF submarine communications to which you refer
> are NOT carrying voice communications, but very low-rate
> CW ("Morse code," if you want to think of it that way) signalling.
>
> Bob M.