The range of medium, long and short waves of the radio receiver provides a long range of reception. VHF (FM) range provides a much higher quality of reception and sound reproduction than in any other wave band. However, this range is limited by the straightness of wave propagation. This disadvantage is compensated by the use of the RDS system (Radio Data System), which automatically selects the frequency with the highest reception quality when the radio is broadcasting on more than one frequency. BMW car models «x5» series «E53» equipped with three independent antennas. The built-in processor automatically selects the antenna that provides the highest reception quality in the VHF band.