Decode DRM with the Fraunhofer software and a Perseus

If you're a DRM fan then you most probably use Dream. However you can use the Fraunhofer software now as well. The fantastic software Ratemonkey has been updated to support conversion to 12kHz IF output streaming. Meaning that that Fraunhofer can now be used.

By default the DRM mode in Perseus uses 8kHz for the centre frequency which won't work as the Fraunhofer software needs 12kHz. However! using Ratemonkey you can convert the input signal centre frequency to any centre frequency between -800 and +800kHz.

If you need to run Perseus with a 12 kHz intermediate frequency (IF) output, use Ratemonkey with the new option: -outifhz 12000

You can download the new version of Ratemonkey here:
http://www.drm-sender.de/?page=tools&lang=en

If instead you're happy with Dream then you can bypass Dreams default start-up mode and use complex IQ and 0kHz offset by starting Dream from the cmd line or modifying the short cut to: dream -c 5, once changed you can use the 'USER' mode in Perseus to send 0kHz IQ to the Dream software.

By default Dream starts as "dream -c 2" which gives mono 12 kHz. There are a lot of Dream start up options which allow you to get the best from the software. The Dream WiKi or forum can provide some more examples.

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