Technician exam question T7A08
Subelement T7, PRACTICAL CIRCUITS· Group T7A
Which of the following describes combining speech with an RF carrier signal?
- A.Impedance matching
- B.Oscillation
- C.Modulation (correct answer)
- D.Low-pass filtering
WhyModulation describes combining speech with an RF carrier signal. Combining a speech (or other information) signal with an RF carrier so the carrier's amplitude, frequency, or phase varies with that information is called modulation, answer C. Impedance matching (A) concerns transferring power efficiently between circuits, oscillation (B) is generating the carrier itself, not combining it with anything, and low-pass filtering (D) removes high frequencies rather than combining signals.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2026-2030 NCVEC Element 2 pool (public domain); the explanation above is original writing, see our methodology.
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