Basic Qualification · B-003 Station assembly, practice and safety · B-003-013-006
What is the approximate bandwidth of a frequency modulated signal using 5 kHz deviation?
- A Less than 5 kHz
- B Between 5 kHz and 10 kHz
- C Greater than 20 kHz
- D Between 10 kHz and 20 kHz
Correct answer: D — Between 10 kHz and 20 kHz. From the official ISED question bank, verified word for word.
Why
A frequency modulated signal with 5 kHz deviation spreads its energy across a range wider than the deviation itself because the audio tone also adds to the total width. The full explanation — and one for every question — is in Pro.
Practise this section
Building a station safely: power supplies, grounding, RF exposure, lightning, feedline routing, and what a transmitter, receiver and transceiver actually do.