Hi Alvin. All Ettus Research USRP SDRs ship with default FPGA bitstreams that have the same basic functionality: 1) a digital interface to the RF front end (ADCs/DACs), 2) digital up and down converters, 3) interpolation and decimation blocks to adjust the sample rate, and 4) digital logic for control, system configuration, data streaming, synchronization, and interfaces to the host PC running UHD/GNU Radio. In the case of the B210, the data/control interface between the USRP and the B210 is orchestrated by a Cypress FX3 USB3 controller IC that resides on the B210.
The product datasheets available at www.ettus.com, the schematics ( https://files.ettus.com/schematics/b200/), and the Knowledge Base ( kb.ettus.com) are good references for additional details. *It is worth emphasizing that a majority of USRP users do not need to modify the FPGA and should not attempt to do so unless they possess expertise in FPGA design. * Ettus Research does make the FPGA code for all of our products freely available on Github, although we cannot provide support on this mailing list for people who customize this code and encounter difficulties. In the case of the USRP B210, with the exception of the USRP Source and USRP Sync GNU Radio Companion blocks, which are graphical representations of the USRP receive and transmit chains, the functionality represented by the GNU Radio flowgraph runs primarily on the host PC. I encourage you to work through the GNU Radio guided tutorial: https://wiki.gnuradio.org/index.php/Guided_Tutorial_Hardware_Considerations Also, it it well worth consulting some supplementary reference material to build up general knowledge about RF and SDR: https://wiki.gnuradio.org/index.php/SuggestedReading -Robin On Mon, May 21, 2018 at 8:18 PM, Yeo Jin Kuang Alvin (IA) via USRP-users < usrp-users@lists.ettus.com> wrote: > Hi all, > > > > Just a quick question, everything done using the UHD C++ and GNU Radio > Companion, is it done in the FPGA or computer itself? I am using USRP B210 > and what is the FPGA used for, as I know Gnu Radio is a > software-defined-radio framework, and all the blocks execute on the PC host. > > > > Thank you in advanced! > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > >
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