Geneva wave plan (1975)

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The Geneva Wave Plan is the set of rules drawn up in Geneva in 1974/75 , in which the operation of the radio stations in the long and medium wave range was specified.

history

The first Geneva Wave Plan came into effect on November 14, 1926; it provided a frequency grid of 10 kHz for 99 channels in the medium wave range from 500 kHz to 1500 kHz. After an intermediate regulation (9 kHz grid below 1000 kHz, 10 kHz grid above) in Brussels on January 13, 1929, an agreement made in Prague on June 30, 1929 changed the frequency grid from 500 kHz to 1300 kHz to 9 kHz stipulated, between 1300 kHz and 1500 kHz the 10 kHz grid remained. For the long-wave range between 150 kHz and 224 kHz established in Washington, DC in 1927 , channel spacings between 7 kHz and 10 kHz were agreed.

Further regulations were made in Lucerne in 1933 and in Copenhagen in 1948 .

The Geneva Wave Plan became necessary because the multitude of transmitters in these radio bands led to more and more mutual interference. It came into force on November 23, 1978 for medium wave and is still valid today with minor modifications due to mutual coordination.

A separate changeover regulation was made for the long-wave range, since other radio services also have usage rights in this frequency range and these had to be given time to adjust their transmission frequencies. The changeover took place later and in three stages: 148.5 to 193.5 kHz on February 1, 1986, 193.5 to 238.5 kHz on February 1, 1988, and 238.5 to 283.5 kHz on February 1, 1990 .

Individual evidence

  1. ^ Department of Commerce : Radio service bulletin, No. 149 (August 31, 1929)
  2. ↑ Announcement on the European Broadcasting Agreement of September 16, 1934 ( RGBl. II p. 763 , 779 )
  3. ^ European Broadcasting Convention, Copenhagen, September 15, 1948, UK Treaty Series No. 30 (1950)
  4. ^ Additional Protocol I relating to the Abrogation of the European Broadcasting Convention, Geneva, November 22, 1975, UK Treaty Series No. 58 (1986)

See also

Web links