Hi, I am trying to communicate two usrps. In side A, i used Flex 1800 cards and 
in side B LFTX-LFRX cards. I connected side A with antennas and side B with a 
wire. To use these cards  smultaneously, at the transmitter side i put a dual 
usrp sink block. At the receiver i used dual usrp source block.In my opinion 
There is no problem at the transmitter side. Because i can receive both signals 
when i use usrp source block at the receiver. But when i use dual usrp source 
block i took a runtime error.It says " terminate called after throwing an 
instance of 'std::runtime error' what() cannot compute dual mux when mixing 
quadrature and non-quadrature subdevices". I don't know what is wrong. Please 
write your opinions. Thanks...
                                          
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