Basic Qualification · B-008 Interference and suppression · B-008-004-004
Quel terme décrit l'énergie radio indésirable transmise tout juste en dehors de la largeur de bande nécessaire?
- ARayonnement parasite
- BRayonnements non essentiels
- CÉmission "hors bande"
- DRayonnement harmonique
Correct answer: C — Émission "hors bande". Question tirée de la banque officielle d'ISDE.
Why
"Out-of-band" emissions describe unwanted radio energy that leaks just outside the specific frequency range your signal is allowed to use. 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