Basic Qualification · B-003 Station assembly, practice and safety · B-003-006-005
Dans un émetteur à bande latérale unique, quelle est la fonction de l'amplificateur microphonique?
- AAmplifier le contenu harmonique du signal
- BAmplifier l'audio qui doit être émis
- CAmplifier une des deux bandes latérales
- DAmplifier la porteuse
Correct answer: B — Amplifier l'audio qui doit être émis. Question tirée de la banque officielle d'ISDE.
Why
The speech amplifier boosts the weak electrical signal from your microphone before it reaches the rest of the transmitter, ensuring your voice is strong enough to be processed clearly. 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