Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-008-009
The designator AX.25 is associated with which amateur radio mode?
- A spread spectrum speech
- B packet
- C RTTY
- D ASCII
Correct answer: B — packet. From the official ISED question bank, verified word for word.
Why
AX.25 is the specific rulebook that computers follow to send digital data in small chunks called packets over amateur radio. The full explanation — and one for every question — is in Pro.
Practise this section
Transmitters, modulation and processing: AM, FM, SSB, keying, speech processing, and the numbers behind occupied bandwidth.