I meant to include this link with regards to the same rates in my previous email: https://files.ettus.com/manual_archive/v3.15.0.0/html/page_general.html#general_sampleratenotes
On Fri, Jan 10, 2020 at 10:40 AM Nate Temple <nate.tem...@ettus.com> wrote: > Hi Richard, > > To clarify, are you using a common Octoclock, with the 3 X300's in the > same location, or separate locations with 3x Octoclocks? Do you have equal > length cables to the antennas and does the rest of the system match ? > > What is your RX frequency ? > > What daughterboard are you using? > > You may want to try using a decimation factor that will produce an > non-fractional host sample rate, instead of 200e6/22 = 9090909.09090909_ > MHz. Does running at 10 MS/s sample rate produce any difference in the > result? > > > Regards, > Nate Temple > > On Thu, Jan 9, 2020 at 4:08 PM Brian Padalino via USRP-users < > usrp-users@lists.ettus.com> wrote: > >> On Thu, Jan 9, 2020 at 6:45 PM Richard Bell <richard.be...@gmail.com> >> wrote: >> >>> No I don't need to know phase information. I'm cross correlating the >>> pairs of receivers and the location of the peak gives me the TDOA. If the >>> hardware chains across different radios introduce different delays, that >>> would invalidate the TDOA measurement. So long as the delay is the same >>> through all the hardware chains, the TDOA estimate will be accurate. Can I >>> assume the hardware delay through X300 USRPs with the same FPGA image and >>> set to the same sampling frequency will be the same? >>> >> >> I'd think the group delay should be pretty consistent - at least within >> 10's of nanoseconds of each other if the setup is identical. >> >> What type of variation are you seeing when you perform your cross >> correlations? How much variation are you able to handle? >> >> Brian >> >>> _______________________________________________ >> USRP-users mailing list >> USRP-users@lists.ettus.com >> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >> >
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