Veijo, https://github.com/argilo/gr-dsd
Be advised that mbelib may not be legal to use, hence the anonymity of the authors. This ambiguity could be eliminated if someone created a block to use an AMBE-3000 device. One source of AMBE devices is http://nwdigitalradio.com/thumbdv-and-dv3000-resource-page (I am affiliated with this company). Talking to the AMBE-3000 devices listed is pretty straightforward, should someone be inclined. Open the device as a serial port at 230.4 kbps. It's a simple packet interface and every packet has a reply. Send a reset packet hex *61 00 01 00 33* at program startup Then query for model number packet with hex *61 00 01 00 30* and look for AMBE3000 in reply Set D-STAR mode with *61 00 0c 00 0a 01 30 07 63 40 00 00 00 00 00 00 48* Set Yaesu, P25 , DMR, etc. HR mode with *61 00 0c 00 0a 04 31 07 54 24 00 00 00 00 00 6F 48 * (See page 83 of AMBE-3000 manual -- link below) >From there, you send in audio 16-bit linear PCM data sampled at 8 kHz in packets and it sends out AMBE in packets. (You can also use 8-bit ulaw/alaw but the PCM is better quality) Audio header is *61 01 42 02 00 A0* Or send in AMBE packets and receive audio packets. AMBE header is *61 00 0B 01 01 48* Pretty much it, just need to frame packet data based on the packet protocol. The manual is at http://www.dvsinc.com/manuals/AMBE-3000_manual.pdf -- see Chapter 6. Current software uses the non-parity field version, but you are free to use either. On Mon, Jan 26, 2015 at 7:37 AM, Veijo Arponen <oh3...@gmail.com> wrote: > Hello, > > My first touch to the Gnu Radio happened this weekend. I managed to listen > a local FM repeater but building a DMR receiver was too tough. > > Please, could someone send me a simple working DMR receiver file (*.grc) > which has a DSD block. > > Thanks advanced > > 73 de Veijo OH3NFC > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > -- ------------------------------ John D. Hays K7VE PO Box 1223, Edmonds, WA 98020-1223 <http://k7ve.org/blog> <http://twitter.com/#!/john_hays> <http://www.facebook.com/john.d.hays>
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