Amplitude modulation
What Amplitude modulation means in Physics A-Level, as defined for AQA.
Definitions of Amplitude modulation
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Reference: AQA
The carrier's amplitude varies at the information frequency while the carrier frequency stays constant, so the envelope of the displayed waveform rises and falls.
A technique in which the amplitude of the carrier changes in step with the audio or data signal while the carrier frequency stays fixed.
Topics that use Amplitude modulation
Related terms
- Amplitude modulation (AM)
- Bandwidth
- Carrier wave
- Frequency and period relationship
- Frequency modulation
- Information signal
- Waveform interpretation and graphical representation
- Carrier waves and information transfer
Using Amplitude modulation in the exam
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