eval-ad9653  wrong ad results using AD9653_FIFO5_FPGA_SourceCode with chipscope

i evaluate the ad9653 with hsc-adc-evalcz fpga board + eval ad9653 board.

when i using visual analog , the sample result is right, but when i use the ad9653-fifo5-fpga source code firmware with xilinx chipscope , the result is wrong.

why ?

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