There's so much Marcus in here ;) so here's my answer: usually, you'd use the USRP+WBX as direct conversion receiver, not an IF one.
Regarding WBX documentation: have you seen the performance measurements [1], and the UHD manual [2]? Is there some specific information you're missing? Best regards, Marcus PS: if you'd agree, I'd like to shift this discussion to usrp-us...@lists.ettus.com . [1] http://files.ettus.com/performance_data/wbx/ [2] http://files.ettus.com/manual/page_dboards.html#dboards_wbx On 12/08/2014 08:57 PM, Richard Bell wrote: > I think Marcus answered my question. Thank you. > > On Mon, Dec 8, 2014 at 11:53 AM, Richard Bell <richard.be...@gmail.com> > wrote: > >> I'm apologize. I am using a WBX card. >> >> I forgot to mention that I've been looking for a datasheet for the WBX, >> but all I can find is the PCB schematic doc on the ettus website which >> isn't very useful. So I don't know what the IF frequency coming out of the >> WBX is. Does the WBX tune itself given the UHD source settings so that the >> IF it produces is proper for the USRP ADC? >> >> Rich >> >> On Mon, Dec 8, 2014 at 11:28 AM, <mle...@ripnet.com> wrote: >> >>> The N2xx series use a fixed sample rate, so there's no "deciding what >>> sample rate to use based on Fc". >>> >>> There's also the analog bandwidth of the ADC to consider. If you aren't >>> going to use a downconverter card, then the analog bandwidth of the ADC >>> will start to roll-off at some point, so even if you narrowband filter your >>> input signal to remove aliasing possibilities, you will end up in the >>> roll-off skirts of the analog bandwidth of the ADC. >>> >>> Is there some reason not to use a downconverter card, like the WBX for >>> your application? >>> >>> >>> >>> >>> >>> >>> On 2014-12-08 14:23, Richard Bell wrote: >>> >>> I have a binary FSK signal centered at 300 MHz with 160 kHz offset >>> peaks from the center freak. Therefore the lowest signal frequency of >>> interest is 300-0.16 = 299.84 MHz and the highest is 300.16 MHz. >>> >>> I know the maximum sampling rate of the USRPN210 ADC is 100 MSPS. If the >>> USRP uses that sample rate of 100 MSPS, it will alias my signal onto itself >>> in an unwanted manor. >>> >>> My question is, how does the USRPN210 decide what sample rate to set the >>> ADC to? Is it a function of both the center frequency and the sample rate >>> setting of the UHD source block? >>> >>> Thanks, >>> Rich >>> >>> _______________________________________________ >>> Discuss-gnuradio mailing >>> listDiscuss-gnuradio@gnu.orghttps://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>> >>> > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
_______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
