Basic Qualification · B-003 Station assembly, practice and safety · B-003-012-004
Quelle est la largeur de bande généralement occupée par les radioamateurs pour émettre en bande latérale unique?
- AEntre 2 kHz et 3 kHz
- B1 kHz
- C2 kHz
- DEntre 3 kHz et 6 kHz
Correct answer: A — Entre 2 kHz et 3 kHz. Question tirée de la banque officielle d'ISDE.
Why
A single-sideband voice signal usually takes up between 2 kHz and 3 kHz of radio spectrum because it transmits only one side of the voice frequency range, stripping away the carrier and the other side to save space. 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