Basic Qualification · B-003 Station assembly, practice and safety · B-003-006-009
Dans un émetteur à bande latérale unique, quel étage transpose la voix du spectre audio au spectre radio?
- ALe mélangeur
- BL'oscillateur à fréquence variable
- CL'oscillateur RF fixe
- DLe modulateur équilibré
Correct answer: D — Le modulateur équilibré. Question tirée de la banque officielle d'ISDE.
Why
The balanced modulator is the stage that takes your voice signal and shifts it up from the audio range into the radio frequency range, which is essential for single-sideband transmission. 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