说明：  DFT 计算 实验步骤： 主界面下进入实验九的“DFT计算”的子实验。 输入取样点数，即有限长序列 x(n) 的长度。 输入信号表达式，或直接输入离散序列。 鼠标单击确定按钮，显示原序列及 DFT 系数的幅度、相位。
(DFT calculation of the experimental steps: the main interface into the experimental Kau " DFT calculation of" sub-experiment. Enter the sampling points, that is, finite sequences x (n) length. Expression of the input signal, or directly onto a discrete sequence. Mouse click OK button to display the original sequence and the magnitude of DFT coefficients, phase.)