Hi, I am going to to design a AC mains voltage measurement system.Tthe input specifications are as given below Input Voltage- 230Vrms 50Hz Harmonics to be measured- up to 15th Harmonics I need to know what should be my sampling rate to measure AC signal of 50HZ with up to 15th Harmonics. The max input frequency is 50*15= 750Hz As per nyquist criteria Fs min = 750*2= 1500Hz But what should be the optimum sampling rate- is it as per nyquist criteria or more than that. How to find out optimum sampling frequency ? (Minimum and maximum) and how to select adc as per sampling rate specification. Thanks and Regards, Swaminath
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