Total posts : 45366
This is an interesting way to compare or set the transmitters. I didn’t quite follow the description of the display. Usually, the carrier remains constant in amplitude and the sidebands appear on each side of the carrier with modulation. I am guessing that the analyzer resolution was not narrow enough to separate the sidebands from the carrier so it appeared that the carrier amplitude was “jumping”.
It is a surprise to many that in the AM spectrum the carrier amplitude is constant with modulation and in FM the carrier amplitude varies with modulation. This seems counter intuitive but this is how it works.