Basic Qualification · B-003 Station assembly, practice and safety · B-003-003-001
Dans un récepteur superhétérodyne, quel étage nomme-t-on l'étage d'entrée ("frontend")?
- AL'amplificateur audiofréquence
- BLe limiteur
- CL'amplificateur radiofréquence
- DL'oscillateur local
Correct answer: C — L'amplificateur radiofréquence. Question tirée de la banque officielle d'ISDE.
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
Station assembly, practice and safety is section B-003 of the Basic exam: Building a station safely: power supplies, grounding, RF exposure, lightning, feedline routing, and what a transmitter, receiver and transceiver actually do.
Drill B-003 — free, no account