Basic Qualification · B-003 Station assembly, practice and safety · B-003-007-006
Why are some transceivers capable of operating computer-based digital modes without a separate sound card?
- A Because they support CAT (Computer Aided Transceiver)
- B Because they incorporate an audio codec
- C Because they provide a USB connector
- D Because digital signal processing (DSP) is built-in
Correct answer: B — Because they incorporate an audio codec. From the official ISED question bank, verified word for word.
Why
An audio codec is a chip inside the radio that converts sound waves into digital data and back again, allowing the transceiver to handle computer-based digital modes directly without needing an external device to do this conversion. 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.