[Discuss-gnuradio] RuntimeError: b200: 2 RX 1 TX and 1 RX 2 TX configurations not possible

[Lefteris Kampianakis]

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

address@hidden --> USRP_sink_channel1
address@hidden --> 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

gnuradio.png
Description: PNG image