Technician exam question T4B05
Subelement T4, AMATEUR RADIO PRACTICES· Group T4B
What does the scanning function of an FM transceiver do?
- A.Checks incoming signal deviation
- B.Prevents interference to nearby repeaters
- C.Tunes through a range of frequencies to check for activity (correct answer)
- D.Tunes through a range of frequencies to determine the antenna’s resonant frequency
WhyThe scanning function of an FM transceiver tunes through a range of frequencies to check for activity. A scanning receiver automatically steps through a range of stored or programmed frequencies, stopping when it detects activity, letting an operator monitor several channels without manually retuning, answer C. It doesn't check signal deviation (A), it doesn't prevent interference to repeaters (B, that's a job for squelch tones like CTCSS), and it has nothing to do with finding an antenna's resonant frequency (D, that's what an antenna analyzer does).
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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