How to get continous white noise using Simulink to produce analog output from NI USB 4431 DAQ ?

I have to generate continuous white noise using the NI USB 4431 Analog output using SIMULINK. For that, I created an (i) white noise block and (ii) analog output block in the simulink, after this, I connected both blocks to generate the output.

When I am running the Simulink, the white noise generating through the NI DAQ is not continuous; it is staggering.

Answer 1

[Rishi]

Hi Raja,

I understand from your query that you want to know why the generated white noise is staggering rather than continuous.

You can use the Band-Limited White Noise block to introduce white noise into continuous system. You can learn more about it from the given documentation:

https://www.mathworks.com/help/releases/R2023a/simulink/slref/bandlimitedwhitenoise.html

You can try the following steps to ensure that the output you get is continuous:

• Ensure that the sample rate of the White Noise block matches the requirements of NI USB 4431 Analog Output.
• You may need to increase the sample rate to achieve a smoother, more continuous output.
• Verify that the White Noise block and the Analog Output block are synchronised in terms of their clock signals.

Hope this helps.