The image of the advertising campaign informs of the switch from medium waves to FM

Within six years, more than 90% of Japan’s commercial stations (44 out of 47) will leave medium-wave to switch to frequency modulation. In September 2028, only three stations will remain active in northern Japans Hokkaido and Akita Prefecture. But the airwaves will begin to empty from next year: the first channels will be turned off in the fall of 2023. The advertising crisis has prompted broadcasters to ask the communications ministry to migrate to FM to reduce operating costs: AM systems are energy-intensive, maintenance expenses are high, and antennas at least 100 meters high are needed to transmit. The last to leave the airwaves will be three Tokyo-based broadcasters-TBS Radio, Nippon Cultural Broadcasting and Nippon Broadcasting System-and some will continue to keep AM transmitters on after 2028. In Japan, the FM band goes from 76 to 95 MHz because the higher channels, before the digital switchover, were occupied by television.
Written by Fabrizio Carnevalini

Malawi: Reorganisation of FM band to alleviate interference

Malawi Communications Regulatory Authority (MACRA)
MACRA – Malawi Communications Regulatory Authority

Repeaters are to be turned off, transmitting power to be reduced, and frequencies to be reallocated, all in order to decongest the FM frequencies in this West African country, where they have 56 radio stations with a total of about 200 channels. MACRA – Malawi Communications Regulatory Authority stopped issuing new radio broadcast licenses and called for a tender for the reorganisation of the radio frequencies. This was subsequently won by the English consulting firm, CASiTEL.

The three phase plan

workshop about achievements
One of the workshops at which the improvements achieved and the required changes were presented to the broadcasters

The consulting firm mapped out the current FM network and created a database of the frequencies and broadcasting sites. They examined the FM network coverage, identified the areas impacted by interference and presented a plan to significantly improve the quality of service. Finally, they optimised the broadcasting services coverage to enable the introduction of a greater number of channels that will be issued broadcasting licenses in the course of 2020.

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