Basic Qualification · B-003 Station assembly, practice and safety · B-003-006-001
Dans un émetteur à bande latérale unique, quelle est la fonction de l'oscillateur RF fixe?
- AIl alimente le mélangeur
- BIl équilibre l'oscillateur à fréquence variable
- CIl produit une porteuse RF
- DIl alimente directement le filtre de bande latérale
Correct answer: C — Il produit une porteuse RF. Question tirée de la banque officielle d'ISDE.
Why
In a single-sideband transmitter, the fixed RF oscillator generates the steady radio frequency signal that acts as the carrier wave before the sideband filter removes the unwanted parts. 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