ITU zone
An ITU zone is an area on the earth's surface as classified by the International Telecommunication Union (ITU).
The areas were defined at a worldwide conference of the ITU, which took place from 1948 to 1949 in Mexico City , for broadcasting service on shortwave . After the name of the conference, the zones are also called CIRAF zones ( Conferencia Internacional de Radiodifusión por Altas Frecuencias ). They are used to plan the occupancy of frequencies with the aim of avoiding mutual interference from radio stations. In amateur radio , they are used for some amateur radio diplomas where you have to prove connections with different ITU zones.
The earth's surface is divided into 90 ITU zones, of which zones 1 to 75 cover the land masses and zones 76 to 90 cover the oceans. Germany, Austria and Switzerland are in the northwest quadrant of zone 28, which extends to Greece in the southeast.
In amateur radio, a different division into 40 CQ zones is also used (with Germany and Switzerland in zone 14 and Austria in zone 15).
See also
Web links
- ITU-R HFBC reference data (reference tables, CIRAF zones maps)
- VO Funk , edition 1990, volume 2 , AP1-33 and AP2-9
- Icom: CQ DX zones, ITU DX zones (map)
- EI8IC: Ham Radio Maps
- Hammaps
Individual evidence
- ↑ Luxorion: The history of amateur radio - 8