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ADC10D1500采样数据杂散问题

Other Parts Discussed in Thread: ADC10D1500

您好:

  我现在使用ADC10D1500芯片,1.5GHZ采样单频信号,或者无输入(噪声输入),采用1:2Demux,Non-DES mode,得到750M数据,375M数据时钟,使用stratix iii 系列FPGA读取ADC的量化数据,使用Matlab对数据做FFT,观察信号频谱,在750MHZ处有明显杂散,该硬件电路板为个人设计电路板,现在找不到引起750M杂散的原因,图片在附件中,忘指点,十分感谢!

ADC10D1500数据频谱分析.docx