PSD with White Noise

[lukaszc331]

Hello,

another problem with Labview, I need to plot transmittance chart H(f) using White Noise, PSD and IIR filter with sepcifications like on this photo below (with property chart). 

I check the probes and there's no any f0 values, I also check errors, but still nothing.

Any advice for me? 🙂

[GerdW]

Hi Lukasz,

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@lukaszc331 wrote:

Any advice for me?

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Advice:

Don't use an arbitrary ramp to simulate a X axis: this will not make up any sense for your signal…

See this:

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@lukaszc331 wrote:

I check the probes and there's no any f0 values, I also check errors, but still nothing.

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There is an amplitude for f0, it's just quite small as can be seen in your image!

You apply a bandpass filter, using 100Hz & 500Hz as filter limits. Which amplitudes do you expect outside this frequency band?

[lukaszc331]

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. Which amplitudes do you expect outside this frequency band?

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Yes, of course outside its 0. But I need to get Wafeform like this:

Y - transmittance, X - frequency

New VI below.