K
Kevin Aylward
- Jan 1, 1970
- 0
[/QUOTE]Dbowey said:jfields posted:
I don't believe you set me straight....... Hmmmm....Nope. In my
humble opinion, you are not correct.[/QUOTE]
And that opinion is demenstatable incorrect. I have given the
mathematical outline as to why. Indeed, I have explained in detail why
it is correct to state that the carrier amplitude varies an why it is
also correct to state its the sidebands that varies. It is trivially
obvious form the mathematical trigonometric identity relating products
of sines with sums of differences of sines. To repeat, if one writes
Vo = A(t).Sin(wt)
There is no real rational argument that can prevent Sin(wt) being
*defined* as the carrier, and A(t) *defined* as its amplitude. In
addition, I agree, that there is no real rational argument that can
prevent the alterative definition based on the "carrier" being constant.
What part of "mathematical identity" do you have trouble with?
Yes, sidebands can be generated by turning the carrier on and off or
changing its amplitude by changing the power supply voltage, but that
is not AM as it is generally used; it's closer kin is CW,
This is a right daft arument.
as in
International Morse transmission.
Unfortunately, this is a very constrained view of signal, or
mathematical analysis. What part of "There is nothing unique in the the
Time view or Fourier view" do you have problem with?
Indeed, as soon as it is brought to explicit attention that the Fourier
view is only one way of infinatly many ways to expand a function in an
orthogonal set, it should be immediately clear that "The universe, is
what we say it is" - James Burk - Connections" TV series.
Kevin Aylward
[email protected]
http://www.anasoft.co.uk
SuperSpice, a very affordable Mixed-Mode
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