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Digitising FM and AM – Your Question Answered

Digitising FM and AM – Your Question Answered

Our best specialists will respond in brief to your questions. We will post them regularly. Please submit them in writing and in audio with your picture and we will post the answers here. Please keep your questions short and relevant and send them to: projectoffice@drm.

If there is such an emphasis put on digitising FM, why do we need to still think about AM and digitise mediumwave or even shortwave transmitters, not an easy project?

(African broadcasters)

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In order to get radio national full coverage, a combination of FM and AM, analogue and increasingly digital is necessary. The VHF band is ideal for urban and townships, area while the AM band, specifically medium waves, is ideal for rural areas, dispersed populations particularly where the land profile has very different characteristics (mountainous, deep valleys etc.).

In most African countries the majority of people are living in rural areas with variable terrain characteristics. In the words of an African regulator “without AM, most of the population is left without broadcasting services.”