On Jun 17, 4:45 pm, wrote:
In rec.radio.amateur.antenna Radium wrote:

On Jun 17, 4:05 pm, wrote:
So at any given time, you need some number of photons at different
frequencies to get the frequency components and some number of
photons at each frequency component to the the amplitude components
of the total signal.
Well, in FM the peak-to-peak amplitude remains constant but the energy
[frequency] varies.
In AM, the frequency remains constant but the peak to peak amplitude
varies.

You've never seen what an AM signal looks like on a spectrum analyzer,
have you?


Scroll down to "A More Realistic Spectrum"
- Go look at:http://www.fas.org/man/dod-101/navy/docs/es310/AM.htm
Check-out the two side-by-side Images


Hot flash for you, the AM modulation process creates other frequencies.

If you only have one frequency, you don't have modulation of any
kind.

--
Jim Pennino

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