Basic Qualification · B-003 Station assembly, practice and safety · B-003-007-004
Which of the following is a function of the sound card interface in a station operating computer-based digital modes?
- A To provide audio frequency coupling between a computer and a transceiver
- B To provide radio frequency coupling between a computer and a transceiver
- C To amplify the digital signals to be sent by the transceiver
- D To demodulate the transmitted signal
Correct answer: A — To provide audio frequency coupling between a computer and a transceiver. From the official ISED question bank, verified word for word.
Why
The sound card interface acts as a bridge that carries voice-range tones, known as audio frequencies, between your computer and your radio. 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.