Richard,
On 22-08-13 21:46, Richard Shaw wrote: > I'm not sure who has and has not heard of this so here's an overview: > > http://qrper.com/2013/05/ten-tec-introduces-the-model-506-rebel-an-open-source-qrp-transceiver/ > > I'm assuming the on board processor isn't fast enough, even though it > has a 80MHz processor but could FreeDV be added on as a "shield"? > > I actually got to hold one of these in my hand as one of the members > of the club I'm in is helping develop expansions/accessories, etc for > it. Because of the secrecy at the time he wasn't able to tell us he'd > be speaking about it at the Huntsville hamfest but he also gave a > short presentation at our club meeting Tuesday. I think this is not very well suited. If I understand it correctly, it is based on the DDS (Direct digital synthesizer) technique to generate a carrier of a very specific frequency from a microcontroller. There is an interesting article and board on elector managazine on DDS and how to use an ATtiny as frequency-generator using this technique: http://www.elektor.com/magazines/2012/march/avr-software-defined-radio-%281%29.2084135.lynkx To actually do something usefull with it, you can -say- generate this carrier or not (CW) or slightly vary the frequency or phase of the carrier based on some protocol (RTTY, PSK, WSPR, .. even FM). FreeDV would be quite difficult as this requires multiple carriers to be modulated at the same time. Also, add the process of codec2 encoding which is quite CPU demanding on itself. Note there is no audio-input on the radio. I have not found any information on how reception is done. What I am also missing are possibilities to interface with it via -say- serial, SPI, I2C, etc. But it's an interesting design. I am interested to see the scematics and software of this thing. (it is supposted to be open source hardware and open source software). Let's hope we will see a community of hams behind it to do usefull stuff with it and expand it. > Thanks, > Richard 73 kristoff - ON1ARF (who actually has a chipkit uno laying around here). :-) ------------------------------------------------------------------------------ Introducing Performance Central, a new site from SourceForge and AppDynamics. Performance Central is your source for news, insights, analysis and resources for efficient Application Performance Management. Visit us today! http://pubads.g.doubleclick.net/gampad/clk?id=48897511&iu=/4140/ostg.clktrk _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
