1．掌握A/D 转换的基本过程和程序处理过程； 2．学习通过对采样值进行计算产生混频波形。 3．熟悉FIR 滤波器及其参数的调整。-1. Master A/D conversion process of the basic processes and procedures 2. Learning through the computed values of the sampled wave mixing. 3. Familiar with the adjustment of FIR f