Re: [Discuss-gnuradio] Signal distorted when using concurrently two USRP B210 devices

[Marcus D. Leech]

On 06/12/2017 03:53 PM, George Vardakis wrote:

Hello all,

I have two USRP B210 devices which i use in my MIMO application. When i use the two of them concurrently in a flowgraph - or different flowgraphs - i notice that the signal received by the streams of one of the devices (the one whose serial number is last in lexicographical order) is distorted. Because i transmit a known training sequence, i know what to expect, and i observe that sometimes the real or imaginary part of the signal has flipped its sign (i see the signal mirrored compared to the known one), or other times it is completely distorted. When i use each device separately, everything works fine. The UHD driver i use is the v3.9.5 one.Any ideas about it?

Thank you!  

_______________________________________________
Discuss-gnuradio mailing list
address@hidden
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

COuld you perhaps share a very-simple flow-graph that shows the issue?

What sample-rate are you using?  Is this over USB-2 or USB-3?