Technician exam question T4B03
Subelement T4, AMATEUR RADIO PRACTICES· Group T4B
How is squelch adjusted so that a weak FM signal can be heard?
- A.Set the squelch threshold so that receiver output audio is on all the time (correct answer)
- B.Turn up the audio level until it overcomes the squelch threshold
- C.Turn on the anti-squelch function
- D.Enable squelch enhancement
WhyTo make a weak FM signal audible, the squelch threshold is set so that receiver output audio is on all the time. Squelch mutes receiver audio until an incoming signal is strong enough to break the threshold, so setting that threshold low enough that audio plays continuously, even with background noise present, is what lets a signal too weak to clear a higher threshold still be heard, answer A. B confuses squelch with audio volume, raising the volume doesn't change whether a signal opens squelch, and C and D refer to controls that don't exist on typical FM transceivers.
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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