Basic Qualification · B-003 Station assembly, practice and safety · B-003-006-008
Dans un émetteur à bande latérale unique, quel étage comprend normalement un circuit de protection contre un rapport d'onde stationnaire (ROS) trop élevé?
- AL'amplificateur microphonique
- BL'oscillateur à fréquence variable
- CLe modulateur équilibré
- DL'amplificateur final
Correct answer: D — L'amplificateur final. Question tirée de la banque officielle d'ISDE.
Why
The final amplifier is the last stage before the antenna, where the radio frequency signal reaches its highest 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