Hi Kevin,
 
Since the final result of a PM modulator is FM, the term True FM implies
that the modulator being spoken about is just that, truely FM, not PM.
 
The True output of a True phase modulator is Truly preemphasized audio.
 
The True output of a True frequency modulator that is preceeded by True pre-emphasis is also Truly preemphasized audio.
 
But using the term True FM implies there must also be a False FM, which would be PM.
 
So we can say that the True output of a False FM is Truly preemphasized audio.
 
Likewise, there is no need for True preemphasis ahead of a False FM to obtain preemphasized audio.
 
73,
Bob, WA9FBO
 
 








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