Basic Qualification · B-003 Station assembly, practice and safety · B-003-014-003
Que devez-vous régler avant d'utiliser un microphone pour la première fois avec un émetteur-récepteur?
- ALe seuil du suppresseur de bruit (antiparasite)
- BLe réglage d'excursion de fréquence
- CLe niveau de la commande automatique de gain
- DLe niveau de l'amplificateur microphonique
Correct answer: D — Le niveau de l'amplificateur microphonique. Question tirée de la banque officielle d'ISDE.
Why
You must set the microphone gain level first because it controls how much your voice boosts the radio signal; if it is too low, others cannot hear you, and if it is too high, your speech becomes distorted and wastes power. 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