Radio communications: Expand the abbreviation AM. In broadcast engineering and signal processing, what does the term AM stand for? Choose the correct expansion.

Difficulty: Easy

Amplitude Modulation
Angular Modulation
Analog Multiplexing
Audio Mixing

Correct Answer: Amplitude Modulation

Explanation:

Given
Abbreviation: AM in radio communications.

Concept/Approach
AM is a method where the amplitude of a carrier wave is varied in proportion to the message (audio) signal.

Key point
AM = Amplitude Modulation.

Common pitfalls
Do not confuse with FM (Frequency Modulation) or PM (Phase Modulation).

Final Answer
Amplitude Modulation.

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