VHF FM Radio
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While digital radio has been around for many years now, for a long time it has only represented “unknown energy” in the air. Radio listeners in many countries only use VHF FM radio, a technology that has been with us since the 1940s. This will probably remain unchanged for a few more years. Even many old VHF radio transmitters are/were replaced with new ones since the legacy generations of transmitters based on tube technology are/were no longer economically viable. With its quality and efficiency, the good old VHF FM still makes penetration difficult for digital radio that has also other problems to contend with. This chapter will briefly describe the essential features of VHF FM radio and the fundamental measurements of the FM signal. The standard applicable to VHF FM radio is [ITU-R BS.450-3].
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