I am building an Elektor-Electronics DDS receiver with a 12KHz
bandwidth. It is RS232 controlled and covers 1-25MHz. The boards are
available mail order, and I have found all the components except thr 12
kHz Murata filter CFW455F and the Murata 470KHz ceramic resonator
CSN470, which is pulled a bit to mix with 455KHz to get 12KHz. I plan
to use it for spectrum scanning and BPL monitoring.
Leigh.
On Wed, 1 Dec 2004 11:11 am, Tom Koeken wrote:
Hi
Several broadcaststations are testing Digital Radio Mondial a.o.
Deutsche Welle on 3995 kHz (yep allowed broadcastband in Region 1).
DRM uses 12 kHz wide "audio" to be decoded by software into digital
audio.
A friend got it working op a TS-680? where he used a modified (wider)
IF filter op a spare CW-N location in combination with the standard SSB
detector/audio chain.
The IF-filter of a K2 is adjustable, but perhaps not wide enough for
DRM.
So my questions:
-has someone tried recieving DRM signals (and succeeded)?
-what is the maximum IF width fot the K2 IF?
73 Tom PC5D
K2-100 s/n 2709
PS more info on DRM on www.drmrx.org or wwdxc.de/drm.pdf and for the
hamversion HB9TLK on qsl.net or www.qslnet.de/member/hb9tlk/
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