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NI 9237 continuous sampling loop reading rate

NI 9237 continious sampling

sampling rate:2k


Have a while loop to read the samples. 

N channel N sample 1D waveform


1, If I set a number of samples to read, no mater what the number is (i.e. 10, 20, 50, 100), the loop reading rate is like only 5Hz (read 5 times oer second)

2, if I don't set a number of samples to read (i.e. read all available samples), the loop reading rate is as fast as it can be, but the Y attribution of the waveform cannot be get ( i.e. empty array), the waveform can be shown on the chart control though.

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Hi Eric_LZ,


I noticed that you posted this inquiry twice. In order to consolidate the answers that you will be getting, I think it is better if we answer the questions here.



Jason M.
Applications Engineer
National Instruments
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