Hello Jonathon Thanks for your reply. Answering your questions:
On 07-Feb-2018, at 11:18 PM, Jon Pendlum <jon.pend...@gmail.com<mailto:jon.pend...@gmail.com>> wrote: Hi Snehasish, How long do you record samples? Do the overflows occur immediately? I have tried recording it for 2minutes. Yes, as soon as I start it. Are they continuous, bursty, only at the beginning? It’s continues. What rate can you run at without overflows? I need to check that. I will check this and let you know by tomorrow morning<x-apple-data-detectors://2>. I would suggest running "benchmark_rate --rx_rate 25.6e6 --duration 600" and "uhd_fft --samp-rate 25.6e6 --freq 2.4e9". Your system should be able to run both of those apps without continuous overflows. I will try this and share the results with you. BR Snehasish On 07-Feb-2018, at 11:44 PM, Jon Pendlum <jon.pend...@gmail.com<mailto:jon.pend...@gmail.com>> wrote: Hi Snehasish, How long do you record samples? Do the overflows occur immediately? Are they continuous, bursty, only at the beginning? What rate can you run at without overflows? I would suggest running "benchmark_rate --rx_rate 25.6e6 --duration 600" and "uhd_fft --samp-rate 25.6e6 --freq 2.4e9". Your system should be able to run both of those apps without continuous overflows. Jonathon On Wed, Feb 7, 2018 at 8:41 AM, Snehasish Kar via USRP-users <usrp-users@lists.ettus.com<mailto:usrp-users@lists.ettus.com>> wrote: Hello I am uisng NI USRP 2954R with RAM 64GB, and intel Xeon CPU D-1537 @ 1.70GHz with supermicro motherboard MBD-X10SDV-7TP4F and intel SFP+ of model X552. I am trying to stream data at sample rate of 25.6MSPS using both the receivers in gnuradio and writing the the samples to a linux-FIFO, but as soon as I start it, it only gives me overflow on both the channels. Please help me with it, where I am going wrong. Below is the output of my uhd_usrp_probe. uhd_usrp_probe --args="addr=192.168.40.2" [INFO] [UHDlinux; GNU C++ version 4.8.3 20140911 (Red Hat 4.8.3-7); Boost_105400; UHD_4.0.0.rfnoc-devel-409-gec9138eb] [INFO] [X300] X300 initialization sequence... [INFO] [X300] Determining maximum frame size... [INFO] [X300] Maximum frame size: 8000 bytes. [INFO] [X300] Setup basic communication... [INFO] [X300] Loading values from EEPROM... [INFO] [X300] Setup RF frontend clocking... [INFO] [X300] Radio 1x clock:200 [INFO] [X300] Detecting internal GPSDO.... [INFO] [GPS] Found an internal GPSDO: LC_XO, Firmware Rev 0.929a [INFO] [RFNOC] [DMA FIFO] Running BIST for FIFO 0... [INFO] [RFNOC] pass (Throughput: 1290.5MB/s) [INFO] [RFNOC] [DMA FIFO] Running BIST for FIFO 1... [INFO] [RFNOC] pass (Throughput: 1304.2MB/s) [INFO] [RFNOC RADIO] Register loopback test passed [INFO] [RFNOC RADIO] Register loopback test passed [INFO] [RFNOC RADIO] Register loopback test passed [INFO] [RFNOC RADIO] Register loopback test passed [INFO] [CORES] Performing timer loopback test... [INFO] [CORES] Timer loopback test passed [INFO] [CORES] Performing timer loopback test... [INFO] [CORES] Timer loopback test passed _____________________________________________________ / | Device: X-Series Device | _____________________________________________________ | / | | Mboard: X310 | | revision: 11 | | revision_compat: 7 | | product: 30810 | | mac-addr0: 00:80:2f:16:51:21 | | mac-addr1: 00:80:2f:16:51:22 | | gateway: 192.168.10.1 | | ip-addr0: 192.168.10.2 | | subnet0: 255.255.255.0 | | ip-addr1: 192.168.20.2 | | subnet1: 255.255.255.0 | | ip-addr2: 192.168.30.2 | | subnet2: 255.255.255.0 | | ip-addr3: 192.168.40.2 | | subnet3: 255.255.255.0 | | serial: 310514A | | FW Version: 5.1 | | FPGA Version: 33.0 | | FPGA git hash: b0890fa-dirty | | RFNoC capable: Yes | | | | Time sources: internal, external, gpsdo | | Clock sources: internal, external, gpsdo | | Sensors: gps_gpgga, gps_gprmc, gps_time, gps_locked, gps_servo, ref_locked | | _____________________________________________________ | | / | | | RX Dboard: A | | | ID: UBX-160 v1 (0x007a) | | | Serial: 3103BF3 | | | _____________________________________________________ | | | / | | | | RX Frontend: 0 | | | | Name: UBX RX | | | | Antennas: TX/RX, RX2, CAL | | | | Sensors: lo_locked | | | | Freq range: 10.000 to 6000.000 MHz | | | | Gain range PGA0: 0.0 to 31.5 step 0.5 dB | | | | Bandwidth range: 160000000.0 to 160000000.0 step 0.0 Hz | | | | Connection Type: IQ | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | RX Codec: A | | | | Name: ads62p48 | | | | Gain range digital: 0.0 to 6.0 step 0.5 dB | | _____________________________________________________ | | / | | | RX Dboard: B | | | ID: UBX-160 v1 (0x007a) | | | Serial: 3103C35 | | | _____________________________________________________ | | | / | | | | RX Frontend: 0 | | | | Name: UBX RX | | | | Antennas: TX/RX, RX2, CAL | | | | Sensors: lo_locked | | | | Freq range: 10.000 to 6000.000 MHz | | | | Gain range PGA0: 0.0 to 31.5 step 0.5 dB | | | | Bandwidth range: 160000000.0 to 160000000.0 step 0.0 Hz | | | | Connection Type: IQ | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | RX Codec: B | | | | Name: ads62p48 | | | | Gain range digital: 0.0 to 6.0 step 0.5 dB | | _____________________________________________________ | | / | | | TX Dboard: A | | | ID: UBX-160 v1 (0x0079) | | | Serial: 3103BF3 | | | _____________________________________________________ | | | / | | | | TX Frontend: 0 | | | | Name: UBX TX | | | | Antennas: TX/RX, CAL | | | | Sensors: lo_locked | | | | Freq range: 10.000 to 6000.000 MHz | | | | Gain range PGA0: 0.0 to 31.5 step 0.5 dB | | | | Bandwidth range: 160000000.0 to 160000000.0 step 0.0 Hz | | | | Connection Type: QI | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | TX Codec: A | | | | Name: ad9146 | | | | Gain Elements: None | | _____________________________________________________ | | / | | | TX Dboard: B | | | ID: UBX-160 v1 (0x0079) | | | Serial: 3103C35 | | | _____________________________________________________ | | | / | | | | TX Frontend: 0 | | | | Name: UBX TX | | | | Antennas: TX/RX, CAL | | | | Sensors: lo_locked | | | | Freq range: 10.000 to 6000.000 MHz | | | | Gain range PGA0: 0.0 to 31.5 step 0.5 dB | | | | Bandwidth range: 160000000.0 to 160000000.0 step 0.0 Hz | | | | Connection Type: QI | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | TX Codec: B | | | | Name: ad9146 | | | | Gain Elements: None | | _____________________________________________________ | | / | | | RFNoC blocks on this device: | | | | | | * DmaFIFO_0 | | | * Radio_0 | | | * Radio_1 | | | * chan128_0 | | | * chan128_1 | | | * downSampler_0 | | | * downSampler_1 | | | * PacketResizer_0 | | | * PacketResizer_1 | | | * FIFO_0 | | | * FIFO_1 | | | * FIFO_2 | | | * FIFO_3 Best Regards Snehasish _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com<mailto:USRP-users@lists.ettus.com> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
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