At 02:25 PM 1/16/2005, you wrote:
there is no correct yes or no answer to the age-old question whether or not sidebands are physical reality, or exist only in the mathematics of modulation theory. It all depends on how you physically observe the signal. Sidebands physically exist only if you use an instrument selective enough to observe them.
The only pure frequency is the sine wave. ANY amplitude distortion is the result of OTHER sine waves in the composite signal. I think the question above arises from the way AM theory has been taught. The simple, no math version which has been taught to technicians primarily takes into consideration the envelope as a single entity and is easier for the majority of people to understand.
73, Mark N5RFX
