Basic Qualification · B-001 Regulations and policies · B-001-019-003
Les stations du service de radioamateur doivent être munies d'un dispositif pouvant indiquer ou prévenir un problème spécifique aux modes voix. Quel est-il?
- ALa surmodulation
- BUne compression excessive
- CUne préaccentuation insuffisante
- DUn filtrage audio insuffisant
Correct answer: A — La surmodulation. Question tirée de la banque officielle d'ISDE.
Why
Overmodulation happens when you speak too loudly or push the microphone gain too high, causing the radio signal to distort and spread into frequencies used by other services. The full explanation — and one for every question — is in Pro.
Practise this section
Regulations and policies is section B-001 of the Basic exam: The rules: who may operate, what the certificate allows, station identification, third-party traffic, what you may and may not transmit, and how ISED regulates the amateur service.
Drill B-001 — free, no account