Well, guys, there are a lot of ideas, hi! There are projects that They make the QSD process by DSP, like the DSP-10. But in this case you make some operations like FIR filter, Hilbert Filter, Sine/Cosine Wavelet,... Maybe it's not a problem because there are DPS too fast, 40 or 60 MIPS.
Also there are DSC, cheap and easy to work with them (Motorola's 56F8165, Microchip's dsPIC30/33F). And they have a fast ADC's (Microchip's dsPIC30F2010 500KSPS). In ANALOG DEVICES there have some ADC faster than it, until 250MSPS. But I think it's easier to make a Tayloe Mixer and after input a ADC. So, Which bandwith do we have to use? I can to input 455KHz from a ADC because Nyquist's rule is about the maximum bandwith that I can get from a signal. I can put the 455KHz to a ADC about 100KSPS but I get only 50KHz bandwith from it. If I get 30KHz, it's the 40M's CW part! (almost). If I use a DSC with a Audio codec, I can make a QSD transceiver. But, Where do I put the QSD process, in a 455, 50 or 30KHz IF? IF to a AD & DSC or to a Tayloe mixer, AD & DSC? Well, guys, it's sooooooooo interesting, isn't it? Juan Machuca EA7FNJ [EMAIL PROTECTED] - [EMAIL PROTECTED] http://www.qsl.net/ea7fnj ______________________________________________ Renovamos el Correo Yahoo! Nuevos servicios, más seguridad http://correo.yahoo.es ------------------------ Yahoo! Groups Sponsor --------------------~--> Get fast access to your favorite Yahoo! Groups. Make Yahoo! your home page http://us.click.yahoo.com/dpRU5A/wUILAA/yQLSAA/ELTolB/TM --------------------------------------------------------------------~-> Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/soft_radio/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
