Re: Sideband Production

To: tesla-at-poodle.pupman-dot-com
Subject: Re: Sideband Production
From: Tesla List <tesla-at-stic-dot-net>
Date: Fri, 21 Mar 1997 00:00:47 -0600
Approved: tesla-at-stic-dot-net

Subject: 
            Re: Sideband Production
       Date: 
            Fri, 21 Mar 1997 15:57:30 +1200
       From: 
            "Malcolm Watts" <MALCOLM-at-directorate.wnp.ac.nz>
Organization: 
            Wellington Polytechnic, NZ
         To: 
            tesla-at-pupman-dot-com


Earlier I wrote on this subject....

>     A final note: As k is increased in the 2-coil system, the 
> frequency Fr-Fb tends to zero, and Fr+Fb tends to infinity so there 
> is a difference between our situation and a modulator.

That is incorrect and highlights the difference between a modulator 
and the coupled coils. I should have given those frequencies the
general labels (x-y) and (x+y), or alternatively, plugged in the 
values from the equations Mark gave. Doing that and reversing the
transform might give better insights as to what's happening.
     As I said earlier, the fact that these two siruations arise
from different processes confounds the explanation somewhat. However,
the sin.sin -> cos+cos transform does show why we see two completely 
different frequencies in the frequency domain.
     So how is energy in the system apportioned? Well, it is either 
in the sidebands *or* in the main frequency depending on which way 
you want to view it. Looking at things in the time domain shows 
clearly how the system voltages appear with respect to time IMHO.

Malcolm