Hi. For me worked as follows:
The reference page transport_udp_sockbufs <https://files.ettus.com/manual/page_transport.html#transport_udp_sockbufs>. i modified the next two: - recv_frame_size: The size of a single receive buffer in bytes - num_recv_frames: The number of receive buffers to allocate Thus, i can manage more samples. It is basically, increasing the buffer amount and the size of each one. You define it in the USRP source parameter: device Arguments. [image: Imágenes integradas 1] If you want to put several of them, you have to separate by a semicolon. 2017-08-11 8:56 GMT-05:00 Markley da Silva Mendes <markley....@gmail.com>: > Hello everyone, > > I have a USRP B200 card and I'm doing a test of the receiver example > provided by the gr-ieee802-11 block, but when I run this example I see in > the terminal a sequence of the letter "O", after some time this sequence is > stopped, And not being able to discover any WiFi network. > > > Here the terminal of running wifi_rc.grc > > Generating: '/home/labora/prefix/default/src/gr-ieee-80211/examples/ > wifi_rx.py' > > Executing: /usr/bin/python2 -u /home/labora/prefix/default/ > src/gr-ieee-80211/examples/wifi_rx.py > > [INFO] [UHDlinux; GNU C++ version 6.2.0 20161005; Boost_106100; > UHD_3.11.0.git-181-g8f9f4184] > [INFO] [B200] Detected Device: B200 > [INFO] [B200] Operating over USB 3. > [INFO] [B200] Initialize CODEC control... > [INFO] [B200] Initialize Radio control... > [INFO] [B200] Performing register loopback test... > [INFO] [B200] pass > [INFO] [AD936X] Performing CODEC loopback test... > [INFO] [AD936X] CODEC loopback test passed > [INFO] [B200] Setting master clock rate selection to 'automatic'. > [INFO] [B200] Asking for clock rate 16.000000 MHz... > [INFO] [B200] Actually got clock rate 16.000000 MHz. > [INFO] [CORES] Performing timer loopback test... > [INFO] [CORES] Timer loopback test passed > [INFO] [B200] Asking for clock rate 20.000000 MHz... > [INFO] [B200] Actually got clock rate 20.000000 MHz. > [INFO] [CORES] Performing timer loopback test... > [INFO] [CORES] Timer loopback test passed > OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOencoding: 4 - > length: 14 - symbols: 2 > length: 10 > > new mac frame (length 10) > ========================================= > frame too short to parse (<20) > OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO > OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO > OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO > OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO > OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO > >>> Done > > > > In some research I find out this error, it's the overruns (or overflows), > but I did not figure out the solution. I run the benchmark_rate but the > return does not show that there was any error. > > Benchmark_rate command > root@cgtravel04:/home/labora/prefix/default/lib/uhd/examples# > ./benchmark_rate --rx_rate 20e6 --tx_rate 20e6 > > [INFO] [UHDlinux; GNU C++ version 6.2.0 20161005; Boost_106100; > UHD_3.11.0.git-181-g8f9f4184] > Creating the usrp device with: ... > [INFO] [B200] Detected Device: B200 > [INFO] [B200] Operating over USB 3. > [INFO] [B200] Initialize CODEC control... > [INFO] [B200] Initialize Radio control... > [INFO] [B200] Performing register loopback test... > [INFO] [B200] pass > [INFO] [AD936X] Performing CODEC loopback test... > [INFO] [AD936X] CODEC loopback test passed > [INFO] [B200] Setting master clock rate selection to 'automatic'. > [INFO] [B200] Asking for clock rate 16.000000 MHz... > [INFO] [B200] Actually got clock rate 16.000000 MHz. > [INFO] [CORES] Performing timer loopback test... > [INFO] [CORES] Timer loopback test passed > Using Device: Single USRP: > Device: B-Series Device > Mboard 0: B200 > RX Channel: 0 > RX DSP: 0 > RX Dboard: A > RX Subdev: FE-RX1 > TX Channel: 0 > TX DSP: 0 > TX Dboard: A > TX Subdev: FE-TX1 > > Setting device timestamp to 0... > [INFO] [B200] Asking for clock rate 20.000000 MHz... > [INFO] [B200] Actually got clock rate 20.000000 MHz. > [INFO] [CORES] Performing timer loopback test... > [INFO] [CORES] Timer loopback test passed > Testing receive rate 20.000000 Msps on 1 channels > Testing transmit rate 20.000000 Msps on 1 channels > > Benchmark rate summary: > Num received samples: 200445992 > Num dropped samples: 0 > Num overflows detected: 0 > Num transmitted samples: 200064676 > Num sequence errors: 0 > Num underflows detected: 0 > Num late commands: 0 > Num timeouts: 0 > > > Done! > > Anyone have idea for solving my problem? > Thanks in advance for your help > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> Libre de virus. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
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