Hello, I have a B210 and I am trying to transmit and receive from all it's channels simultaneously. My setup is a macmini late 2012 with Ubuntu 12.04 install. I compiled and installed gnuradio from source using the gnuradio build script. I have developed the attached very simple GRC script that looks like this
signal_source@1khz --> USRP_sink_channel1 signal_source@2khz --> USRP_sink_channel2 USRP_source_channel1 --> WX_GUI_scope_channel1 USRP_source_channel2 --> WX_GUI_scope_channel2 The problem I have is that I get the following message at random times and on average on 1/3 executions of the GRC script. linux; GNU C++ version 4.6.3; Boost_104800; UHD_003.008.000-18-g864f84b5 Using Volk machine: avx_64_mmx_orc -- Operating over USB 3. -- Initialize CODEC control... -- Initialize Radio control... -- Performing register loopback test... pass -- Performing register loopback test... pass -- Performing CODEC loopback test... pass -- Performing CODEC loopback test... pass -- Asking for clock rate 32.000000 MHz -- Actually got clock rate 32.000000 MHz -- Performing timer loopback test... pass -- Performing timer loopback test... pass -- Asking for clock rate 28.000000 MHz -- Actually got clock rate 28.000000 MHz -- Performing timer loopback test... pass -- Performing timer loopback test... pass -- Tune Request: 915.000000 MHz -- The RF LO does not support the requested frequency: -- Requested LO Frequency: 915.000000 MHz -- RF LO Result: 914.999999 MHz -- Attempted to use the DSP to reach the requested frequency: -- Desired DSP Frequency: -0.000001 MHz -- DSP Result: -0.000001 MHz -- Successfully tuned to 915.000000 MHz -- -- Tune Request: 915.000000 MHz -- The RF LO does not support the requested frequency: -- Requested LO Frequency: 915.000000 MHz -- RF LO Result: 914.999999 MHz -- Attempted to use the DSP to reach the requested frequency: -- Desired DSP Frequency: -0.000001 MHz -- DSP Result: -0.000001 MHz -- Successfully tuned to 915.000000 MHz -- -- Asking for clock rate 28.000000 MHz -- Actually got clock rate 28.000000 MHz -- Performing timer loopback test... pass -- Performing timer loopback test... pass -- Tune Request: 915.000000 MHz -- The RF LO does not support the requested frequency: -- Requested LO Frequency: 915.000000 MHz -- RF LO Result: 914.999999 MHz -- Attempted to use the DSP to reach the requested frequency: -- Desired DSP Frequency: 0.000001 MHz -- DSP Result: 0.000001 MHz -- Successfully tuned to 915.000000 MHz -- -- Tune Request: 915.000000 MHz -- The RF LO does not support the requested frequency: -- Requested LO Frequency: 915.000000 MHz -- RF LO Result: 914.999999 MHz -- Attempted to use the DSP to reach the requested frequency: -- Desired DSP Frequency: 0.000001 MHz -- DSP Result: 0.000001 MHz -- Successfully tuned to 915.000000 MHz -- *thread[thread-per-block[2]: <block gr uhd usrp sink (24)>]: RuntimeError: b200: 2 RX 1 TX and 1 RX 2 TX configurations not possible* It is obvious that I have all channels activated and that this message shouldn't be appearing in the first place, let alone, appearing in a non-deterministic manner. Any ideas? Thank you in advance Lefteris
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