Hello Bashar_222,
Can you clarify what you mean by wanting to transmit a seperate I and Q from a USRP? Do you want 2 simultaneous transmissions, each with a seperate part of your input signal?
You can certainly transmit different signals from a B210, assuming you want them on the same LO frequency. If you wanted to, for example, send only I data from channel 0 and Q data from channel 1 then as you're constructing your Tx data for channel 0 simply set the Q portion to zero and when you're constructions the Tx data for channel 1 set the I portion to zero.
N210 cannot transmit 2 signals simultaneously, it only has a single Tx port. But you could alternate your I & Q Tx data by constructing it in a simliar way to above and then just send one after the other.
