The process of varying the AMPLITUDE of a sound, often periodically. An example of AM is the violinist's TREMOLO, where the amplitude of the vibrating string is rapidly altered by a movement of the ...

See modulation and carrier. Vary the Amplitude In AM modulation, the voltage (amplitude) of the carrier is varied by the incoming signal. In this example, the modulating wave implies an analog signal.

For example, a standard broadcast amplitude modulation signal looks like Figure 18 where the high frequency carrier signal always has an envelope that looks like the low frequency modulating signal.

Having studied the case of two-level amplitude modulation, we next investigate the accuracy of CNN-based demodulation for data encoded via four-level amplitude-modulation.

Amplitude level linearity Engineers can combine the N8827A/B PAM-4 option with existing Infiniium real-time oscilloscope software tools to provide even more powerful analysis capability: ...

Pulse amplitude modulation (PAM) is a way to pack more bits into the same amount of time on a serial channel. The usual mechanism used in serial communications is the binary non-return to zero (NRZ).