Basic Qualification · B-003 Station assembly, practice and safety · B-003-007-001
Which of the following is a function of the sound card interface in a station operating computer-based digital modes?
- A To amplify the digital signals to be sent by the transceiver
- B To demodulate the transmitted signal
- C To convert the received analog audio signal from the transceiver into a digital signal for the computer
- D To convert the received digital signal from the transceiver into an analog signal for the computer
Correct answer: C — To convert the received analog audio signal from the transceiver into a digital signal for the computer. From the official ISED question bank, verified word for word.
Why
A sound card interface acts as a bridge between your radio and computer, taking the analog audio waves coming from the transceiver and turning them into digital data the computer can process. 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.