Basic Qualification · B-003 Station assembly, practice and safety · B-003-011-009
Un oscillateur RF doit avoir une bonne stabilité électrique et mécanique pour ne PAS provoquer de:
- Adérive de la fréquence dans le temps
- Bsurmodulation
- Cclaquements de manipulation
- Ddistorsion trop élevée
Correct answer: A — dérive de la fréquence dans le temps. Question tirée de la banque officielle d'ISDE.
Why
An RF oscillator must stay steady so its signal does not drift in frequency over time, which would cause your transmission to wander off the assigned channel and interfere with others. 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