Extra exam question E2B06
Subelement E2, OPERATING PROCEDURES· Group E2B
What is vestigial sideband modulation?
- A.Amplitude modulation in which one complete sideband and a portion of the other are transmitted (correct answer)
- B.A type of modulation in which one sideband is inverted
- C.Narrow-band FM modulation achieved by filtering one sideband from the audio before frequency modulating the carrier
- D.Spread spectrum modulation achieved by applying FM modulation following single sideband amplitude modulation
WhyVestigial sideband modulation is amplitude modulation in which one complete sideband and only a portion of the other are transmitted. Vestigial sideband modulation is a form of amplitude modulation in which one sideband is transmitted in full and only a small vestige, a portion, of the other sideband is kept, a compromise between full double sideband AM and true single sideband, answer A. It's not about inverting a sideband, filtering audio ahead of an FM carrier, or layering FM on top of SSB, those describe different modulation schemes.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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