how do you simulcast AM and FM radio on a single transmitter?

Answer 1

You don't. Simulcasting concerns the
program content, not the transmitters.
Which is how they work the editting
of the "S" word on their simulcasts.

Answer 2

the other answers assume you mean 1 transmitter that operates in both the AM frequency band 540-1640 khz and the FM frequency band, 88-108 mhz.

if you mean what happens if you try to AM and FM modulate on the same carrier frequency, then you get either partial or complete cancellation of one of the sidebands. This is the so-called third method of single-sideband modulation.

Answer 3

television broadcast is the example.The video is AM and the sound is FM(sub-service 6.5 or 5.5 for mono and 5.74MHz for stereo).Any way, you additionally could make a AM modulation to a FM transmitter by means of fact the FM receiver has a AMPLITUDE limiter for demodulation.

Answer 4

You wouldn't. The frequency ranges are way too far apart to build an efficient transmitter design. And then there is the little problem that you would still need two different antennas....