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ptc-49154761-Visitor
1-Visitor
January 21, 2013
Question

template for FFT

  • January 21, 2013
  • 2 replies
  • 7576 views

Hello,

is there any template for a FFT plot in Mathcad Prime?

Let's say I have a CSV that contains noise data of an electronic component and I just want to plot voltage vs frequency. Where do I start? Any good tutorial for non-mathematicians? Most "introductions" aren't kept exactly simple.

Thanks

2 replies

M
MichaelH1-Visitor
1-Visitor
January 21, 2013

In the "Help" files, search on "FFT".

There are several example worksheets that should be adequate.

P
ptc-49154761-VisitorAuthor
1-Visitor
January 21, 2013

Are there no templates available somewhere where I just could load the CSV into?

Of course I had a look at the help files.

M
MichaelH1-Visitor
1-Visitor
January 21, 2013

It should not be that difficult to do it in Mathcad.

You should probably stick to using the FFT functions in Excel.

P
ptc-49154761-VisitorAuthor
1-Visitor
January 24, 2013

Ok, I finally got the graph working.

How do I get a logarithmic scale on the X axis?

Here is a screen shot. The CSV is too big to post it here.

noise.PNG

Thanks

M
MichaelH1-Visitor
1-Visitor
January 24, 2013

Steve Paul wrote:

How do I get a logarithmic scale on the X axis?

Click on the x-axis to select it.

Go to the "Plot" tab. Click on the "Logarithmic Scaling" button.

Also, note that your graph is mirror symmetric about the 500 Hz point. This is an artifact of the FFT process. You should limit the graphed data to 500 Hz.

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