Technician exam question T7A05
Subelement T7, PRACTICAL CIRCUITS· Group T7A
What is the name of a circuit that generates a signal at a specific frequency?
- A.Reactance modulator
- B.Phase modulator
- C.Low-pass filter
- D.Oscillator (correct answer)
WhyAn oscillator is the name of a circuit that generates a signal at a specific frequency. An oscillator is the circuit built to generate a steady signal at a specific, chosen frequency, forming the basis for a transmitter's carrier or a receiver's local oscillator, answer D. A reactance modulator (A) and phase modulator (B) impose information onto an existing carrier rather than generating it from scratch, and a low-pass filter (C) removes frequencies above a cutoff rather than generating one.
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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