I placed an order for this device a week ago. As I understood from the description, the board has a U.FL connector for an external reference frequency. However, the parameters of the external reference signal (frequency) are not yet known.
Yes! “... TCXO and reserve an IPEX socket for external clock input to AD9363“
Besides the frequency, the power is also unknown!
PlutoSDR can accept input reference frequencies between 10 MHz and 80 MHz. You have to log into the PlutoSDR to set the reference clock.
Power: between 0.8 Vpp and 1.3 Vpp.