Basic Qualification · B-003 Station assembly, practice and safety · B-003-011-007
You are transmitting using amplitude modulation. What bandwidth does your signal occupy if the highest frequency of your voice is 3 kHz?
- A9 kHz
- B6 kHz
- C3 kHz
- D12 kHz
Correct answer: B — 6 kHz. From the official ISED question bank, verified word for word.
Why
Amplitude modulation creates two sidebands, one above and one below your carrier frequency, each matching the highest audio frequency you transmit. 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