Basic Qualification · B-003 Station assembly, practice and safety · B-003-011-004
Quel genre de modulation modifie l'amplitude d'une radiofréquence pour qu'elle puisse véhiculer l'information?
- ALa modulation en fréquence
- BLa modulation en amplitude
- CLa modulation en phase
- DLa modulation par déplacement de fréquence
Correct answer: B — La modulation en amplitude. Question tirée de la banque officielle d'ISDE.
Why
Amplitude modulation works by varying the strength, or height, of the radio wave to carry your voice or data, much like turning a volume knob up and down. 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