Basic Qualification · B-003 Station assembly, practice and safety · B-003-006-003
Dans un émetteur à bande latérale unique de conception typique, quelle est la fonction du filtre qui suit le modulateur équilibré?
- AAssurer la mise en forme du signal audio
- BAtténuer les harmoniques du signal émis
- CSupprimer la bande latérale non désirée
- DSupprimer la porteuse
Correct answer: C — Supprimer la bande latérale non désirée. Question tirée de la banque officielle d'ISDE.
Why
A balanced modulator creates both an upper and a lower sideband along with the carrier, but single-sideband transmission requires only one of those sidebands to save space and power. 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