Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-008-007

APRS (Automatic Packet Reporting System) does NOT support which one of these functions?

1. A Automatic link establishment
2. B Two-way messaging
3. C Telemetry
4. D Amateur-specific local information broadcast

Correct answer: A — Automatic link establishment. From the official ISED question bank, verified word for word.

Why

Automatic link establishment requires a protocol that can negotiate connections and manage handshakes, which APRS does not do because it relies on simple, unacknowledged packet broadcasts. 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.

Drill A-005 — free, no account · All A-005 questions