This is a theory and math question. But it might be clearer to look at a hypothetical example. I have two transmitters. One is broadcasting a continuous sinewave at 1MHz. With the other, I wish to disrupt the waveform, ie. amplitude and shape of the wave, in the intervening space, but only with a second differing _frequency_, eg. not by phase cancellation. What is the ideal mathematic relationship between the two frequencies for achieving this? The second frequency can be any singular waveform. Thank you for any insights.
Lou Stanton