Basic Qualification · B-003 Station assembly, practice and safety · B-003-014-009
Quel type de brouillage le suppresseur de bruit (antiparasite) élimine-t-il le plus efficacement?
- ALe bruit de fond à large bande constant
- BLes battements entendus dans la bande passante
- CLa distorsion due à une surexcursion ("overdeviation")
- DLes impulsions de courte durée et de forte amplitude
Correct answer: D — Les impulsions de courte durée et de forte amplitude. Question tirée de la banque officielle d'ISDE.
Why
A noise blanker works by spotting sudden, sharp bursts of static, like those from a car ignition or a power line spark, and briefly muting the receiver just long enough to skip over them. 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