Basic Qualification · B-003 Station assembly, practice and safety · B-003-006-007
In a single-sideband transmitter, which stage allows you to adjust the final transmit frequency?
- A Sideband filter
- B Balanced modulator
- C Variable frequency oscillator
- D Antenna tuner
Correct answer: C — Variable frequency oscillator. From the official ISED question bank, verified word for word.
Why
The Variable frequency oscillator sets the base radio wave that gets shifted to your chosen channel, so changing its speed directly moves your final transmit frequency. The full explanation — and one for every question — is in Pro.
Practise this section
Building a station safely: power supplies, grounding, RF exposure, lightning, feedline routing, and what a transmitter, receiver and transceiver actually do.