Reg, G4FGQ wrote:
"Instead of thinking in terms of frequency and waves why not do as
Oliver did and try time and waveshape?"

The digital revolution is well underway and Reg has the right idea.
Radio is the domain of frequency and waves however. Terman`s first
words: "Electrical energy that has escaped into free space exists in the
form of electromagnetic waves." are still true.

Step functions lost interest with the demise of telegraph, but ones and
zeros are back bigger than ever.

Best regards, Richard Harrison, KB5WZI