Basic Qualification · B-003 Station assembly, practice and safety · B-003-001-008
Dans une station HF, tout juste après quel élément doit-on insérer le ROS-mètre?
- ALe commutateur d'antenne
- BLe filtre passe-bas
- CLe dernier étage d'amplification RF
- DLe bloc d'accord d'antenne
Correct answer: B — Le filtre passe-bas. Question tirée de la banque officielle d'ISDE.
Why
The low-pass filter belongs right before the SWR meter so the meter reads only the signal heading to the antenna, free from unwanted high-frequency noise that the filter removes. 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