FM broadcast band#OIRT bandplan

As OIRT band (until 1960 OIR band) is still in the former Soviet Union and some neighboring countries used for the FM radio frequency range between 65.8 MHz and 74 MHz respectively. Until the 1990s this area was also used in Eastern Europe.

The term OIRT band originates from the Eastern Radio and Television Organization International de Radio Diffusion et de Télévision ( OIRT ), which had its seat in Prague. She was considered the "socialist counterpart " to the West European European Broadcasting Union ( EBU). There was also the OIRT for television reception a 601 deviates from the CCIR TV standard.

After the changes in Eastern Europe and the dissolution of the OIRT in 1992 changed numerous former member countries of the OIRT in the frequency range of the VHF band II used in the world from 87.5 to 108.0 MHz. To distinguish between the two frequency bands also the terms low FM or FM OIRT for OIRT - band and high FM or FM CCIR for the band II prevailed. Today in Eastern Europe are radio devices on the market that can receive both bands. The frequency spacing in OIRT band is fine with 10 kHz as the CCIR band in the 50 kHz are standard.

Czech Republic was the first country completed the complete conversion of its FM stations on FM CCIR. In the Baltic states, Hungary, Romania, Bulgaria and most CIS countries the transition is largely complete. Individual stations remained active in OIRT area.

Today, the OIRT band continues to be used extensively only in Russia, Ukraine, Moldova and Belarus. These countries have now released but the CCIR band, in particular, have found a place newer programs and private channels. However, this can be used there only in part for the radio, because in these countries send some television channels from 87.5 to 100 MHz.

In the 1950s, the FM radio in Czechoslovakia, Poland and Hungary first began in CCIR band. In the following years, however, the countries had to change according to the report prepared by the OIRT wave plan in the newly created OIRT band. Only in the GDR and Yugoslavia were never transmitter in OIRT - band active.

The frequencies of OIRT band are used in Western Europe for other purposes. In the lower range up to 68 MHz, the channel is 4 The area also is assigned in Germany, according to the frequency usage plan of the Federal Network Agency's mobile operating radio, land mobile service and the railway radio.

Deviating from a worldwide standard FM band there except in the OIRT States or in Japan, where the radio stations 76-90 MHz to send.