Basic Qualification · B-003 Station assembly, practice and safety · B-003-003-001
In a superheterodyne receiver, which stage is called the front-end?
- A RF amplifier
- B Local oscillator
- C AF amplifier
- D Limiter
Correct answer: A — RF amplifier. From the official ISED question bank, verified word for word.
Why
The RF amplifier sits at the very start of a superheterodyne receiver, acting as the first point of contact for incoming radio waves, which is why it earns the name front-end. 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.