Basic Qualification · B-003 Station assembly, practice and safety · B-003-002-006
In an FM transmitter, which stage produces a useful harmonic?
- A Power amplifier
- B Speech amplifier
- C Frequency multiplier
- D Modulator
Correct answer: C — Frequency multiplier. From the official ISED question bank, verified word for word.
Why
A frequency multiplier is designed specifically to take an input signal and output a signal at a whole-number multiple of that frequency, creating useful harmonics to reach higher operating bands. 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.