Hi Ron, Some buffers in the FPGA were reduced in size to only support frame sizes of 8192 on B200 series. This has been fixed in the upcoming 3.14.0.0 release. Frame sizes above 8192 are not guaranteed to work even with the fix, but I have run with send frame sizes up to 16360 successfully. The receive frame size is still limited to 8168.
As another data point, I was able to run 2TX/2RX at full rate of 30.72e6 on B210 with otw data type set to sc12 using frame sizes of 8168, so the higher frame sizes are unnecessary. Regards, Michael On Wed, Jan 16, 2019 at 8:55 AM Ron Economos via USRP-users < usrp-users@lists.ettus.com> wrote: > Correction, v3.13.1.0-rc1 or later. > > On 1/16/19 08:44, Ron Economos via USRP-users wrote: > > Setting the frame size (send_frame_size=x) with UHD v3.13.1.0 or later > > seems broken. I haven't tested receive, but transmit fails with any > > value over 8192. > > > > Many: > > > > [ERROR] [B200] Got a ctrl packet with unknown SID XXXXXXX > > > > And copious SSSSSSSSSSSS > > > > Works fine with v3.13.0.3-rc1 and previous releases. > > > > Ron > > > > > > > > _______________________________________________ > > 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 >
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