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AD9371 EVB: AD9528 SYSREF signal to FPGA (ZC706)

Question asked by fredCY on Mar 21, 2017
Latest reply on Apr 4, 2017 by sripad

         I'd like to observe the behavior of FPGA_SYSREF signal during AD9371 (including AD9528) initialization by using scope. It's strange that there is no signal observed at the points of "FPGA_SYSREF+" and "FPGA_SYSREF-" .But when probing the points of "SYSREF_IN+" and "SYSREF_IN-", the pulse signals can bee seen.

         Does it mean that the FPGA JESD204B interface does not require system reference pulse, only AD9371 JESD204B interface needs the pulse to sync?