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ptc-59180211-Visitor
1-Visitor
May 2, 2014
Question

Problems of Fast Fourier Transform (FFT)

  • May 2, 2014
  • 2 replies
  • 2724 views

Hello Mathcad community!

I'm unexpirienced Mathcad user, but I was able to solve all my problems and misunderstandings by myself. Till now.

I'm trying to analyse the experiment results of electric field measurement. I wanna convert the result into frequency domain by using Fast Fourier Transform (FFT).

I had done some programming in Mathcad prime succesfully, but now I can't find where my mistake is.

I'm attaching sheet and imgs.

Thank you for any kind of help.

PS.: I'm using Mathcad Prime 3.0

2 replies

R
RichardJ19-Tanzanite
19-Tanzanite
May 2, 2014

Please post the data.

P
ptc-59180211-VisitorAuthor
1-Visitor
May 2, 2014

Sorry for missing data files.

R
RichardJ19-Tanzanite
19-Tanzanite
May 2, 2014

The variable on the x-axis, frequency, is not defined.

Edit. I fixed your units issues: d1 should have units of 1/s

P
ptc-59180211-VisitorAuthor
1-Visitor
May 2, 2014

Thank you for your reply.

I tried to add the unit to all variables. And also define the frequency (f), but the FFT is still not working.

I wanna display the x-axis in frequency domain, the frequency is limited from 0-4GHz..

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