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Hi everyone, I'm trying to interface with QDRII+ and I use NetFPGA-1G CML Kintex-7 I have done the simulation, it works just fine, however when I implement to the real board, the calibration is failed. I have 2 questions: Do I need to use exact frequency for sys_clk_p/n (it requires 450.045 MHz)? In the NetFPGA board, I just see 1 pair system_clk_p/n (200MHz), I'm supposed to use it as clk_ref_p/n, what should I use for sys_clk_p/n(450.045MHz) Thanks in advance.