Basic Qualification · B-003 Station assembly, practice and safety · B-003-004-006
Dans un émetteur à ondes entretenues (CW) élémentaire, quelle est la fonction du manipulateur (clé)?
- ACommander la tonalité émise (marche/arrêt)
- BFermer et ouvrir le branchement à l'antenne
- CCommander la porteuse (marche/arrêt)
- DCommuter la porteuse entre deux fréquences
Correct answer: C — Commander la porteuse (marche/arrêt). Question tirée de la banque officielle d'ISDE.
Why
In a basic CW (continuous wave) transmitter, the key acts as a simple switch that turns the radio frequency carrier signal on and off to create the dots and dashes of Morse code. 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