Technician exam question T7A04
Subelement T7, PRACTICAL CIRCUITS· Group T7A
Which term describes the ability of a receiver to discriminate between multiple signals?
- A.Discrimination ratio
- B.Sensitivity
- C.Selectivity (correct answer)
- D.Harmonic distortion
WhySelectivity describes a receiver's ability to discriminate between multiple signals. Selectivity describes a receiver's ability to separate the desired signal from other signals on nearby frequencies, answer C. "Discrimination ratio" (A) isn't a standard receiver specification, sensitivity (B) describes detecting weak signals rather than separating close ones, and harmonic distortion (D) is an unrelated measure of waveform purity.
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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