Basic Qualification · B-003 Station assembly, practice and safety · B-003-011-008
Quelles composantes de fréquence sont présentes dans la largeur de bande d'un signal modulé en amplitude?
- AUne bande latérale
- BUne porteuse et une bande latérale
- CUne porteuse et deux bandes latérales
- DDeux bandes latérales
Correct answer: C — Une porteuse et deux bandes latérales. Question tirée de la banque officielle d'ISDE.
Why
An amplitude modulated signal always contains the original carrier frequency plus two sidebands, one above and one below the carrier, which carry the actual information. 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