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ni 9234 SNR

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Hi,

 

We have developed a system to measure acoustic noise (LAeq, Fast, Slow... ). The system consist in:

 

NI 9171+NI 9234+ Labview+ Sound and Vibration toolkit

The data rate is 25.6 kHz

 

We have been asked about some acoustic parameters and we don't  know how to obtain them from the data sheet.

 

We need the following parameters:

 

- SNR (Signal to noise ratio) of the antialiasing filter and how is calculated.

- Is the Dither applied by default in the NI 9234? if yes which is the probability distribution of the added noise and the aplitude of such noise?

-  SNR of the Delta-Sigma

 

Thank you very much


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