FYI, we fixed a couple of sc12/8 related issues on our latest master branch. As Marcus says, if you're doing dual channel on the B210, you can only go to 30.72 Msps though.
-- M On 07/24/2018 12:06 PM, Marcus D. Leech via USRP-users wrote: > On 07/24/2018 03:18 AM, RizThon via USRP-users wrote: >> Hi all, >> >> I'm still having issues with a B210 with sample rates greater than >> 28MS/s. At 28 I get a few overruns out of a million blocks of 1024 >> samples, but as I sample faster, the number of overruns grow fast. >> >> I have an AMD Ryzen 7 2700 (8 physical cores @ 3.2GHz), 16GB >> RAM, Gigabyte GA-AB350N, Windows 10. The USB driver is >> from http://files.ettus.com/binaries/misc/erllc_uhd_winusb_driver.zip . >> >> I've tried adding "num_recv_frames=256" but I get an error: >> >> Creating the usrp device with: num_recv_frames=256... >> [INFO] [UHD] Win32; Microsoft Visual C++ version 14.0; Boost_106300; >> UHD_3.11.0.1-37-g2c9087d1 >> [INFO] [B200] Detected Device: B210 >> [INFO] [B200] Operating over USB 3. >> [ERROR] [USB] libusb_session_impl::libusb_event_handler_task: >> LIBUSB_ERROR_CODE -1 >> >> I would have expected to be able to stream with barely any overrun at >> 56MS/s on that computer. I stream at that speed in dual channel on a >> LimeSDR (in SC12 format). >> >> Any advice on how to get better results? >> >> Thanks. >> > You cannot stream faster than about 30Msps from the B210 when in > dual-channel mode. This is a limitation of the data bus architecture on > the AD9371 chip, and not strictly a limitation of the B2xx FPGA. > > > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
