Extra exam question E7E03
Subelement E7, PRACTICAL CIRCUITS· Group E7E
E7E03
What is a frequency discriminator?
- A.An FM generator circuit
- B.A circuit for filtering closely adjacent signals
- C.An automatic band-switching circuit
- D.A circuit for detecting FM signals (correct answer)
WhyA frequency discriminator is a circuit for detecting FM signals. A frequency discriminator is a circuit built specifically to detect (demodulate) FM signals, converting frequency variations in the received signal back into the original audio, answer D. It isn't an FM generator (that's the opposite function), isn't a filter for separating closely spaced signals, and isn't an automatic band-switching circuit, those describe unrelated functions.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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