Basic Qualification · B-003 Station assembly, practice and safety · B-003-001-004
Dans une station HF, quel dispositif permet de déterminer si l'impédance du système d'antenne est adaptée à l'émetteur?
- AUn fréquencemètre
- BUn multimètre
- CUn S-mètre
- DUn ROS-mètre
Correct answer: D — Un ROS-mètre. Question tirée de la banque officielle d'ISDE.
Why
An SWR meter measures standing wave ratio, which tells you how well your antenna's resistance matches the transmitter's output so energy flows out instead of bouncing back. 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