Recently, I tried testing how the data flows from one USRP to another in
2x2 setup. My configurations went as follows:
2 USRPs were connected via a MIMO. Each USRP was connected to an
cable and so both of them were in two different subnets. Now when I set
of the USRPs clock source and time source to MIMO, I observed that both
them were synchronized and believe that its acting as a slave for the
Master’s clock and time source.
What I’m not able to understand is whether the slave is receiving its
via the MIMO (from the Master) or via its own RF input i.e whether . I
thought that modulating the RF input to both the USRPs would show some
difference on the FFT plot but both were identical. Could any one please
tell me how the data flow occurs by suggesting a good test case?
My second question is:
In a 4X4 USRP setup, how can we synchronize all the 4 USRPs without a
connection (between 2 USRPs within a pair), using a 10MHz reference
to each of the USRP and a PPS source?
Please not that I’m using USRP N210 for my experiments.
Looking forward to your reply.