General exam question G8A08
Subelement G8, SIGNALS AND EMISSIONS· Group G8A
Which of the following is an effect of overmodulation?
- A.Insufficient audio
- B.Insufficient bandwidth
- C.Frequency drift
- D.Excessive bandwidth (correct answer)
WhyExcessive bandwidth is an effect of overmodulation. Driving an AM or SSB transmitter's audio input harder than its design allows pushes distortion products and splatter out well beyond the signal's normal bandwidth, so overmodulation's characteristic effect is excessive occupied bandwidth, answer D. It doesn't cause insufficient audio, doesn't narrow the bandwidth, and doesn't cause frequency drift, those are unrelated symptoms from unrelated causes.
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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