Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-008-007
Laquelle des fonctions suivantes N'EST PAS une fonction du système APRS ("Automatic Packet Reporting System")?
- AMessagerie bidirectionnelle
- BTélémesure
- CDiffusion d'information locale spécifique au radioamateurisme
- DÉtablissement automatique de liaison
Correct answer: D — Établissement automatique de liaison. Question tirée de la banque officielle d'ISDE.
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 is section A-005 of the Advanced exam: Transmitters, modulation and processing: AM, FM, SSB, keying, speech processing, and the numbers behind occupied bandwidth.
Drill A-005 — free, no account