Algebra equations of series and parallel of impedance are used to obtain the frequency domain transfer function or ratio of phaser voltage on load of test equipment to the phasor voltage of source.

• 以频域阻抗串并联代数分析法求得仪器负载上相量电压与电源相量电压比之转换函数，此转换函数与电源电压波形经快速富氏转换所得频谱之积，再以快速反富氏转换求得量测仪器负载上之电压波形。