Basic Qualification · B-003 Station assembly, practice and safety · B-003-003-005
Dans un récepteur superhétérodyne, quel étage supprime les signaux sur des canaux adjacents?
- ALe détecteur de produit
- BLe filtre de fréquence intermédiaire
- CLe mélangeur
- DLe limiteur
Correct answer: B — Le filtre de fréquence intermédiaire. Question tirée de la banque officielle d'ISDE.
Why
The IF filter is the stage that rejects signals on adjacent channels because it sits after the mixer and is designed to pass only the specific intermediate frequency while blocking nearby frequencies. 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