labview 数字电压表 功能描述：实现仿真信号的电压测量，显示信号频率、标准频率、相位、幅值、直流偏置、峰值、平均值和有效值，并以图形方式显示仿真信号。-labview digital voltmeter Descr iption: Implementation of the simulated signal voltage measurement, display the signal frequency, standard frequency, phase, amplitude, DC