LabVIEW Communications System Design Suite
Full Duplex synchronization TX RX with 2 USRP 2954R
Hello,
I want to realize a synchronization between 2 USRP RIO 2945R with Labview Communication 2.0. I want to send data to the 4 TX and receives to the 4 RX. I know that this subject is widely spread but I did not find any response to my problem, so I am very disappointed 
To do so, since I don't have an octoclock or a MIMO cable, I generated my own 10MHz clock and my 1Hz PPS signal.
Then, I split the clocks with a T splitter and I connect the 10 MHz clocks to the RefIn ports of my USRPs and the 1Hz PPS signals to the PPSin ports of my USRPs. Is that correct? I read somewhere that I had to make 1 USRP as a master and the other as a slave. So, is my HW configuration correct? Or, should I have to connect the 2 PPSin of my 2 USPRs (master & slave) to the PPS trig out of my master USRP?
In SW I proceed as follow:
I open 2 sessions (TX and RX) and I enable all my channels for each sessions (channel 0 to 3). For my RX session, I have a block "Configure Start Trigger time". Also, channels 0 and 1 act as master (RIO0) and channels 2 and 3 act as slave (RIO1). Is it correct? If yes, for channel 0 and 1 I configure the properties "Exported Reference Frequency Output Terminal" and "Exported Timebase output Terminal" to "RefOut" and "PpsTrigOut" respectively. For channels 2 and 3 , I set the properties "Reference Frequency Source" and "Timebase Clock source" to "RefIn" and "PPSin" respectively. Is that correct?
Do I have to do the same for the TX session ("Start Trigger Time block" and set all the properties as for my RX session)?
My project is enclosed. Please help me because I tried a lot of different possibilities but I think that I am missing something.
Thanks in advance.
SG
