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 >> >> >
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