Basic Qualification · B-003 Station assembly, practice and safety · B-003-003-003
Dans un récepteur superhétérodyne, quel étage permet de faire la détection à une fréquence unique, peu importe la fréquence de réception?
- ALe mélangeur
- BLe limiteur
- CLe filtre de fréquence intermédiaire
- DLe discriminateur de fréquence
Correct answer: A — Le mélangeur. Question tirée de la banque officielle d'ISDE.
Why
The Mixer is the stage that shifts any incoming radio signal to a fixed intermediate frequency, allowing the rest of the receiver to process it at that single, unchanging value. 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