Tag: am

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TECHNOLOGY: The evolution of receivers

The evolution of receivers
An old vintage radio from Philips, a company that began producing tube radios in 1927 and became the world’s largest manufacturer of medium-wave radios. Photo by Gerhard C from Pixabay
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An article written by a researcher from EuroScience (European Association for the Advancement of Science and Technology), traces the evolution of radio receivers. Debojit Acharjee, a software engineer and “geek,” as the author likes to call himself, starts from the prototypes invented by Guglielmo Marconi to digital ones. Novelties that have come since the 2000s: from the first pocket radio for listening to the DAB digital band (launched by Pure in 2003), to one for listening to broadcasters streaming on the Web (3com’s Kerbango, which debuted in the 2000s). To arrive at those without the tuning knob, there are the SDRs (Software Defined Radio): receivers that in their more advanced versions (but sold at a price comparable to that of the “transoceanic” radios of the 1970s, such as the Grundig Satellit) allow you to see the full spectrum of the FM band and record 24 MHz. The impetus to innovate? Behind every discovery is the improvement in listening quality, such as that which prompted General Electric in 1940 to invent frequency modulation, demonstrating that it was less susceptible to electromagnetic interference than amplitude modulation, used on medium waves.

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CZECH REPUBLIC: MW SWITCH-OFF BY 2021

The image published on the public radio site shows a detail of the mediumwave facility in Libice
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Czech public radio ‘Český Rozhlas‘ is stepping up its information campaign for listeners receiving mediumwave programmes, ahead of the planned switch-off of transmitters by the end of 2021. Since 1 November, more announcements have been broadcast to warn users and a call centre has been set up to explain the possible listening alternatives (from FM to DAB). In the run-up to Christmas, public radio will launch an intensive advertising campaign in the print media and online magazines on 22 November to promote the purchase of digital DAB receivers to replace analogue radio. The shift away from medium-wave has been underway since the 2000s, affecting countries that have an alternative FM network or are in the process of creating one in DAB. But AM (amplitude modulation) still remains a resource for countries with large territorial coverage that can reach the entire population with a few installations.

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COLOMBIA: New announcement to open AM and FM radio stations

The Colombian Ministry of Information Technology and Communications (MinTIC) will authorize the opening of new commercial radio stations. Today, 664 stations operate in the 32 departments into which the country is divided, equally divided between AM (330) and FM (334)
The Colombian Ministry of Information Technology and Communications (MinTIC) will authorize the opening of new commercial radio stations. Today, 664 stations operate in the 32 departments into which the country is divided, equally divided between AM (330) and FM (334)
Source

Eleven years after the last authorizations, new medium wave (AM) and FM radio stations will be opened in the South American country. The intention, for the Minister of Telecommunications Karen Cecilia Abudinen Abuchaibe, is to “strengthen this means of communication, recognizing it as a tool that consolidates the spread of regional culture, social responsibility and facilitates the development of the regions”. The project is divided into several phases: after the submission of the application, expected by September 17, 2020, the availability of the channels will be verified and the project can be submitted. Then the assignment and the feasibility statement will follow. Details will be added to FMLIST and MWLIST as soon as the information becomes available.

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