Basic Qualification · B-008 Interference and suppression · B-008-005-003
Quel type de filtre atténue l'énergie RF audessus et en dessous d'une certaine gamme de fréquences?
- APasse-haut
- BRéjecteur ("notch")
- CPasse-bas
- DPasse-bande
Correct answer: D — Passe-bande. Question tirée de la banque officielle d'ISDE.
Why
A band-pass filter lets signals through only within a specific range of frequencies, blocking anything too low or too high. 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