Dear Ettus Technical Support Team, So far I have been successful getting the UHD C++ APIs to run the USRP B210 both on Linux(Eclipse) and Windows (Microsoft Visual Studio) in their SISO mode. I have tried further to run the USRP on its both channels. Unfortunately I have not been successful although trying a lot. In my codes I try to run the both channel by the following uhd stream. size_t channel[2] = { 0,1 };; uhd_stream_args_t stream_args = { cpu_format = "fc32", otw_format = "sc16", args = "", channellist = channel, n_channel = 1 }; But when I run the code, only one of the channels captures the signal. When I run the benchmark_rate example I can run both channel receiving and sending simultaneously. I have reviewed the source code of the benchmark_rate code. I have found that in this code have been written somehow differently maybe by C++ APIs not native C API. I tried to mimic the code. I ran the example code on your website (click here https://kb.ettus.com/Getting_Started_with_UHD_and_C%2B%2B) but the compiler shows a run time exception on the following line of the code: uhd::usrp::multi_usrp::sptr usrp=uhd::usrp::multi_usrp::make(device_args); The error is an Access Violation at a specified address of memory. Furthermore, I tried the srsLTE opensource program, the latest version in which it supports the transmit diversity scheme(./pdsch_ue -f 1860000000 -A 2, in the Linux terminal). But when I configure the code to capture on both channels it only captures on one of them. I would be thankful if you get me out of this trouble. Thanks, Masoud

On 08/03/2017 06:12 AM, Masoud Naderpour via USRP-users wrote: > Dear Ettus Technical Support Team, > So far I have been successful getting the UHD C++ APIs to run the USRP > B210 both on Linux(Eclipse) and Windows (Microsoft Visual Studio) in > their SISO mode. I have tried further to run the USRP on its both > channels. Unfortunately I have not been successful although trying a > lot. In my codes I try to run the both channel by the following uhd > stream. > > size_t channel[2] = { 0,1 };; > uhd_stream_args_t stream_args = { > cpu_format = "fc32", > otw_format = "sc16", > args = "", > channellist = channel, > n_channel = 1 > }; > You need "n_channel = 2" in the above.