Basic Qualification · B-003 Station assembly, practice and safety · B-003-007-002
Which of the following is a function of the sound card interface in a station operating computer-based digital modes?
- A To convert the analog signal from the computer into a digital signal that can be transmitted
- B To amplify the digital signals to be sent by the transceiver
- C To demodulate the transmitted signal
- D To convert the digital signal from the computer into an audio signal that can be transmitted
Correct answer: D — To convert the digital signal from the computer into an audio signal that can be transmitted. From the official ISED question bank, verified word for word.
Why
A sound card interface acts as a bridge between your computer and radio, taking digital data from software and turning it into audio tones that the transceiver can send over the air. 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.