frequency chart characteristic 基本例句 频谱特性 This paper analyzes the spectral characteristic of the synthesized waveform by use of the Fourier Series,and discusses the spurious spectrum of the phase truncation errors.本文用傅里叶级数的方法分析了合成波形的频谱特性，并对由于相位截断引起的杂散谱作了讨论。