Basic Qualification · B-003 Station assembly, practice and safety · B-003-006-006
Dans un émetteur à bande latérale unique, quel étage transpose le signal en bande latérale unique à la fréquence d'opération?
- AL'oscillateur à fréquence variable
- BLe modulateur équilibré
- CL'oscillateur RF fixe
- DLe mélangeur
Correct answer: D — Le mélangeur. Question tirée de la banque officielle d'ISDE.
Why
A mixer is the stage that combines two signals to shift a single-sideband signal from its initial low frequency up to the final operating frequency. 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