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QSO
In a logbook, a QSO is a radio contact. Date, time, other station and mode help identify the particular contact.
Also found under: QSO · Funkkontakt · Radio Contact
A concrete example
Record the contact with its UTC time, the other station’s callsign, band and mode. Reception without an exchange is documented separately as a listening report.
What to keep in mind
A QSO entry alone is not confirmation from the other station.
Further reference
Original explanation based on the technical documentation. Reviewed on 15 October 2026.
ADIF Developers Group · ADIF specification ↗