I am using NI6210 and labview to sample the output voltage and current. The output voltage going though the voltage sensor board is connected to the NI6210. When I use labview to observe the voltage waveform,some sampling signals are missing. The PWM frequency of the original voltage signal is 10KHz. My sampling frequency range is from 20KHz to 60KHz. I am pretty confused with the missing signals I detected, do you have some suggestions? Thank you very much.The figure above shows original voltage（top）and sensed voltage(bottom).The figure above shows the voltage signal in labview. I used the standard high frequency (20KHz) squarewave to test the setup and it works well. However, once I sample the output voltage, there are some signals missing. Is that because of the inaccurate sensed voltage I get from the voltage sensor board I made by myself?

Signal Conditioning

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I figured out the problem. The reason is replied above. Thank you very much.

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