Amateur radio DRM trial in Sottens

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Uploaded by on Feb 20, 2011

Amateur radio DRM test transmission from HB9MM in Sottens, Switzerland using a phased out 188 meters high MW antenna. The DRM test setup based on Software Defined Radio consisted of a PC running Spark software for DRM signal generation, a USRP for RF output, a mini-circuits Gali74 amplifier, an unknown brand pre-amplifier and a final 1kW Motorola amplifier normally designed for SSB but running at 150-200W. The signal transmitted was an audio loop announcing the special callsign HE3OM in english and french. Two constellations have been tested 16QAM and 64QAM both in mode B (for skywave propagation). The signal could be received throughout Europe with reports even from Sweden or Latvia.

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  • hey this is very interesting

    thank you for this video

    AMVVir 1 year ago

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