spread sheet file to the formula loop

[KK54321 · Accepted solution]

Hi GerdW,

Thank you for your help,

I have exactly created VI as you mentioned above. But I am unable to get the plots for FFT, IFFT, FFT2. Instead I am getting an 1D array. I have attached the VI for your view. Could you please help me with this. Also, I need multiply with hann window function to the first FFT then need to take IFFT.

Thank you

KK

[KK54321]

Thank you. I figured it out.

[KK54321]

Hi GerdW,

I have incorporated all your suggestions, Now I am moving to the actual program as follows, (goal is to educe the spectral noise to get a clear spectrum)

1. Load and convert spectrum from wavelength to wave number

2. take FFT

3. Multiply with Hann window

4. IFFT.

Some how I made the above steps, and my final spectrum looks good. But I am facing a problem where the spectrum peaks are repeating if you see the plots its like mirror image. How to avoid this. Could you please help me with this. I have attached the VI for your view.

Thank you

KK

[GerdW]

Hi KK,

do you remember my older message?

[KK54321]

Sorry I forgot to down convert. Please find the attached VI.

Thank you

KK

[GerdW]

Hi KK,

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@KK54321 wrote:

I have incorporated all your suggestions,

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No, you have not…

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@KK54321 wrote:

2. take FFT

3. Multiply with Hann window

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2. Why is there still a PtByPt function used? I already told and showed you to use the "regular" funct