Basic Qualification · B-003 Station assembly, practice and safety · B-003-003-006
Dans un récepteur superhétérodyne, quel étage fournit au signal la puissance requise pour alimenter le détecteur?
- AL'amplificateur radiofréquence
- BL'amplificateur microphonique
- CLe multiplicateur de fréquence
- DL'amplificateur de fréquence intermédiaire
Correct answer: D — L'amplificateur de fréquence intermédiaire. Question tirée de la banque officielle d'ISDE.
Why
The IF amplifier boosts the signal to a steady intermediate frequency after the first mixing stage, providing the final power needed before the detector extracts the audio or data. 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