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www.southgatearc.org
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DRM Information WebsiteFor those wanting to find out more information on the new DRM digital broadcasting standard I can recommend the website http://www.drmradio.co.uk/ The site explains amongst other things the 4 different DRM modes, the audio compression techniques and multimedia. It also highlights that in order for DRM to provide near FM quality it will actually require 18kHz bandwidth rather than the 9 kHz often quoted. This will inevitably lead to pressure to increase the spectrum allocated to broadcast services. This could come about through an expansion of upper limit of the Medium Wave band from 1611 kHz to 1790 kHz and increases in the SW Broadcast Bands. Such developments will make it harder for Radio Amateurs to achieve a 7000-7300 kHz worldwide allocation. If the Medium Wave band was extended to 1790 kHz it could impact on Amateur 160 metre operation just a few kHz away at 1810. 73 Trevor M5AKA
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