Hello, I am trying to understand how the most basic form of AM works. Can someone please confirm if my brief description below is essentially correct ? I know that upper and lower sidebands are created when a signal is modulated onto a carrier frequency. These sidebands result in a signal that consumes a larger bandwidth that the original single frequency carrier signal. There is now a signal that spans a range of frequencies rather than the single carrier frequency. The amplitude modulation itself is created from the sum and difference application of the input signal to the carrier signal. Therefore the resulting amplitude modulated waveform, when drawn, would consist of a sine wave of varying frequency and amplitude ? Thanks for any help especially on confirmation of the line immediately above this one.