General exam question G4C03
Subelement G4, AMATEUR RADIO PRACTICES· Group G4C
What sound is heard from an audio device experiencing RF interference from a single sideband phone transmitter?
- A.A steady hum whenever the transmitter is on the air
- B.On-and-off humming or clicking
- C.Distorted speech (correct answer)
- D.Clearly audible speech
WhyAn audio device experiencing RF interference from a single sideband phone transmitter produces distorted speech. SSB energy picked up by a nearby audio device and demodulated by some nonlinear junction in that device comes through as garbled, distorted speech rather than anything intelligible, answer C. It isn't heard as a steady hum, on-and-off clicking (those are more typical of a carrier or CW/pulsed signal), and it's specifically not clear, understandable speech.
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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