Basic Qualification · B-003 Station assembly, practice and safety · B-003-004-004
Dans un émetteur à ondes entretenues (CW) élémentaire de 3 étages, quelle est la fonction du manipulateur (clé)?
- ACommander l'amplitude de la porteuse
- BCommander l'oscillateur (marche/arrêt)
- CRéduire les claquements de manipulation
- DRéduire les pépiements ("chirp")
Correct answer: A — Commander l'amplitude de la porteuse. Question tirée de la banque officielle d'ISDE.
Why
In a continuous wave transmitter, the radio wave is always being generated, so the Morse code signal is created by turning that steady wave on and off. 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