Basic Qualification · B-003 Station assembly, practice and safety · B-003-010-009
A communications receiver has four filters installed in it, respectively designated as 250 Hz, 500 Hz, 2.4 kHz, and 6 kHz. If you were listening to single sideband, which filter would you utilize?
- A 2.4 kHz
- B 250 Hz
- C 6 kHz
- D 500 Hz
Correct answer: A — 2.4 kHz. From the official ISED question bank, verified word for word.
Why
Single sideband voice needs about 2.4 kilohertz of bandwidth to sound clear, so the 2.4 kHz filter is the right choice because it passes the full range of human speech without cutting off important parts. 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.