I installed the Zynq SDR Support from Communications System Toolbox (https://www.mathworks.com/hardware-support/zynq-sdr.html ) to transmit/receive with PicoZed SDR. I followed the installation of the hardware support package and some of the examples (such as the transmit repeat as showed inhttps://www.mathworks.com/help/supportpkg/xilinxzynqbasedradio/examples/qpsk-transmit-repeat-using-analog-devices-ad9361-ad9364.html). My problem is that I am trying with no success operating the PicoZed SDR with external reference clock, instead of the embbeded 40MHz clock. I noticed that the devicetree file was changed during the installation, and the rewriting of the SD card, I tried to configure the clock frequency and the mux so the PicoZed will use my external clock, but nothing has changed. What should I configure/change so I will be able to use external reference clock? note that I currently have the Communication System, DSP System and Signal Processing Toolboxes, and not the HDL and Embedded Coder Toolboxes.