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PXIe4492 acquires sound pressure

Hello,

When using PXIe-4492 to test sound pressure, every time I reset the 4492, , there is always some unwanted waveform instead of  the real wanted signal are captured. But if I test again, it will always capture the right waveform. It only happened when I reset 4492 or after capturing AI Voltage using 4492.

This can be easily reproduce by NI max. Reset 4492, then send out continuous waveform by 4462 , and create AI task to capture sound pressure, you will get the unwanted waveform. click run again, I can get the real wanted waveform.

Thanks

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