While they may be sinusoids, they are not steady state. The tones are switched and their phase may change depending on the modulation. An example would be the first cycle of a sinusoid applied to capacitor or an inductor. You will get some distortion. How much is the question. Phase changes also require a high slew rate capability in order to not be distorted. Your envelope can be caused by many things, even cross-over distortion in a properly operating Class AB final amp. However, it is a good indication that something isn't right! Jim WA0LYK --- In [email protected], Mark Miller <[EMAIL PROTECTED]> wrote: > > > >I'm not sure you can simply use a frequency generator. Remember, > >what we are talking about are in essence, pulses, that is tone > >pulses throughout the audio passband. > > The signals are sinusoids none the less, but maybe FMing a base band square > wave would do the trick. This would in effect be FSK. I did try it out, > with sinusoidal modulation and did get an envelope, one cause of that > envelope would be group delay, but I think that the frequency response of > the receiver circuits would make an envelope looking display. I will have > to work on this. > > 73, > > Mark N5RFX >
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