General exam question G8A11
Subelement G8, SIGNALS AND EMISSIONS· Group G8A
What is the modulation envelope of an AM signal?
- A.The waveform created by connecting the peak values of the modulated signal (correct answer)
- B.The carrier frequency that contains the signal
- C.Spurious signals that envelop nearby frequencies
- D.The bandwidth of the modulated signal
WhyThe modulation envelope of an AM signal is the waveform created by connecting the peak values of the modulated signal. An AM signal's modulation envelope is the outline waveform traced by connecting the peaks of the modulated RF carrier, which reproduces the shape of the original modulating audio, answer A. It isn't the carrier frequency itself, isn't spurious energy on nearby frequencies, and isn't the signal's bandwidth, those are separate concepts from the envelope shape.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2023-2027 NCVEC Element 3 pool (public domain); the explanation above is original writing, see our methodology.
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