General exam question G8B12
Subelement G8, SIGNALS AND EMISSIONS· Group G8B
What process combines two signals in a non-linear circuit to produce unwanted spurious outputs?
- A.Intermodulation (correct answer)
- B.Heterodyning
- C.Detection
- D.Rolloff
WhyIntermodulation is the process that combines two signals in a non-linear circuit to produce unwanted spurious outputs. When two or more signals pass through a nonlinear circuit together, their combination generates additional, unwanted output frequencies beyond the originals, a process called intermodulation, answer A. Heterodyning is the deliberate, wanted mixing of two signals in a receiver or transmitter, detection recovers information from a modulated signal, and rolloff describes a filter's attenuation slope, none of which describes this unwanted nonlinear combination.
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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