29-01-2020, 06:27 PM
(29-01-2020, 03:21 PM)ppppenguin Wrote: You can modulate any combination of vision polarity and AM/FM sound using intercarrier methods. It's simple. Just modulate the sound on to the difference frequency between S and V carriers, then add it to the vision signal ready to be modulated on the RF carrier. It places more stringent linearity requirements on everything after the signals are added.
Agreed!
As long as the amplitude of the composite signal never fell below zero (AM peak on the sound, at the same time as minimum-amplitude V signal). Because if it did, demodulating would be a bit more of a challenge, no peak-detector diode.
