Just been looking at the datasheet: http://www.analog.com/UploadedFiles/Data_Sheets/283618245AD9446_prf.pdf
In HF RX aplications, performance should typically be somewhat better than the headlines below would suggest. Typical SFDR when used up to 30 MHz is 90dB. Moreover, if 2nd & 3rd harmonic responses are ignored, dynamic range up 30 MHz is typically 95dB. Not quite competition grade maybe, but more than adequate in most circumstances, particularly if a tilting network is used to gradually reduce sensitivity to lower Frequencies. According to Gerald Youngbood's article (see below) naturally occuring noise means that a 45dB noise figure is adequate for top band, whereas 15dB is required at 10M (obviously depends on how good your antenna is though). Worst case is that a few bandpass filters (or a tracking front end filter) are required for really difficult RF environments. http://www.flex-radio.com/articles_files/SDRFMP4.pdf Any thoughts on how we use it? Will need an FPGA or very quick DSP to do at least the first stage processing in order to bring the data rate down to something mangeable and to control the PC interfacing. Sure someone will have something up and running by next week! 8-) Regards, Rob --- In [email protected], "i2phd" <[EMAIL PROTECTED]> wrote: > The ideal SDR has the antenna directly connected to the ADC, and from > there on all is done is software. We are not quite at that point yet, > bit this new ADC from Analog Devices is a step in that direction... > > http://www.responses.com/emw/380/9446.html?c=63r9t > > Its dynamic range (80 - 85 db of SFDR) is not enough to allow the > above, but could be useable, at least at an experimentation level, > preceding the ADC with an AGC-controlled front end (with all the > disadvantages that such a solution implies...) > > 73 Alberto I2PHD ------------------------ 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/
