Basic Qualification · B-003 Station assembly, practice and safety · B-003-006-002
Dans un émetteur à bande latérale unique, pourquoi un amplificateur microphonique estil requis?
- ALe filtre de bande latérale exige un fort signal audio
- BPour améliorer la fidélité du signal
- CLes microphones produisent généralement de faibles signaux
- DPour adapter l'impédance de sortie du modulateur équilibré
Correct answer: C — Les microphones produisent généralement de faibles signaux. Question tirée de la banque officielle d'ISDE.
Why
Microphones capture your voice as very weak electrical signals that are too faint to drive the transmitter's next stages effectively. 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