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Wave plan of Geneva
The Final Acts of the Regional Administrative LF/MF Broadcasting Conference (Regions 1 and 3) Geneva, 1975 (GE75) is an internationally agreed frequency plan prepared in Geneva for radio broadcasting on the longwave and Mediumwave bands outside of the Americas. (separate agreements are in place for North and South America).
Additional recommended knowledge
It was drawn up under the auspices of the World Administrative Radio Conference (WARC) of the International Telecommunications Union (ITU) with the assistance of the European Broadcasting Union (EBU/UER)
The Geneva plan replaced the 1948 Copenhagen plan. It became necessary because of the large number of broadcasting stations in these frequency ranges leading to ever more mutual interference. That Geneva wave plan entered into force on 23 November 1978 and although its intended lifespan was only until 1989 it is still valid (with small modification by mutual coordination between countries) today.
Most existing European radio stations were required to change their broadcasting frequencies following implementation of plan . In most cases the changes were slight (only one or two kilohertz) but were more drastic in some cases, particularly in the United Kingdom. However the increased number of radio services and reduction (in most cases) of interference to radio signals (particularly at nighttime) was considered by broadcasters to be worth the initial inconvenience.
As a result of the plan most medium wave (and later longwave) stations outside North and South America operate on exact multiples of 9 kHz which helps reduce heterodyne interference.
Predecessors to the GE75 Plan
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Wave_plan_of_Geneva". A list of authors is available in Wikipedia.|