Basic Qualification · B-008 Interference and suppression · B-008-002-005
Si le signal d'un radioamateur est entendu dans un appareil qui ne contient aucun composant RF, de quel genre de brouillage s'agit-il?
- ARedressement audio
- BSurcharge de l'étage d'entrée
- CÉlargissement des bandes latérales ("splatter")
- DIntermodulation
Correct answer: A — Redressement audio. Question tirée de la banque officielle d'ISDE.
Why
Audio rectification happens when a strong radio signal enters a device with no radio parts, like a speaker or amplifier, and gets converted into an audible buzz or voice. The full explanation — and one for every question — is in Pro.
Practise this section
Interference and suppression is section B-008 of the Basic exam: When things interfere: harmonics, overload, RFI to and from your station, filters, ferrites and how to fix the neighbour's TV.
Drill B-008 — free, no account