Basic Qualification · B-003 Station assembly, practice and safety · B-003-006-006
In a single-sideband transmitter, which stage transposes the single-sideband signal to the operating frequency?
- A Balanced modulator
- B Fixed RF oscillator
- C Mixer
- D Variable frequency oscillator
Correct answer: C — Mixer. From the official ISED question bank, verified word for word.
Why
A mixer is the stage that combines two signals to shift a single-sideband signal from its initial low frequency up to the final operating 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.