Basic Qualification · B-003 Station assembly, practice and safety · B-003-004-001
Dans un émetteur à ondes entretenues (CW) élémentaire, la sortie de l'oscillateur est:
- Aà la puissance d'émission de l'appareil
- Bà un sous-multiple de la fréquence d'émission
- Cmoins stable que le signal émis
- Dà la fréquence d'émission de l'appareil
Correct answer: D — à la fréquence d'émission de l'appareil. Question tirée de la banque officielle d'ISDE.
Why
In a basic continuous wave transmitter, the oscillator is the heart that creates the radio wave, so its output must match the exact frequency you intend to send out. 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