T4B05:What does the scanning function of an FM transceiver do?
Direct answer summary (2026-2030 NCVEC pool)
The official correct answer for T4B05 is Tunes through a range of frequencies to check for activity.
The key fact is Tunes through a range of frequencies to check for activity. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.