Technician exam question T7A11
Subelement T7, PRACTICAL CIRCUITS· Group T7A
What is the function of the Variable Frequency Oscillator (VFO) circuit in a transceiver?
- A.Set the receive and transmit frequency (correct answer)
- B.Provide automatic frequency control
- C.Inject a variable frequency to allow CW reception
- D.Generate and demodulate single sideband signals
WhyA transceiver's Variable Frequency Oscillator (VFO) circuit sets the receive and transmit frequency. A transceiver's Variable Frequency Oscillator sets the actual receive and transmit frequency, and tuning the VFO is how an operator moves around the band, answer A. Automatic frequency control (B) is a separate tracking function, injecting a beat-frequency tone for CW reception (C) is the job of a BFO, not a VFO, and generating or demodulating SSB (D) is handled by the transceiver's modulator and detector stages, not the VFO itself.
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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