On Sat, Sep 2, 2023 at 12:08 AM, Colin Kaminski wrote:
I may have a simplistic view, and I hope to be corrected, but it seems to me that an EER method can only reproduce a single tone at a time
This is sort of the equivalent of saying "but a DAC can only produce one voltage at a time, how can you reproduce an entire waveform that way?"
The magic happens when you do it many thousands of times a second.
What does the waveform of a two tone signal actually look like? The actual waveform, if you squint at it really hard, just looks like a single tone that's being amplitude modulated at the beat frequency between the two tones, and inverts polarity whenever the amplitude modulation has a zero crossing.
An SSB signal, on the air, if you squint at it real hard, is just a single tone that changes frequency and amplitude very rapidly. You can reproduce this by doing the same thing, retuning an oscillator very rapidly and amplitude modulating it.
