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mitxlet

France
5 Posts
Posted - 07/26/2011 :  10:17:19 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Ver. and Service Release (Select Help-->About Origin): OriginPro 8.5
Operating System: Windows 7

Hello to everyone!

I would like to obtain the Power Spectral Density from a set of data (X,Y). Is there a simple way to remove the DC Offset or do I have to create a new column "Y-mean(Y)" before doing the FFT.

Another question : Is there any FFT Tutorial ?

Thank you in advance !

Penn

China
644 Posts
Posted - 07/27/2011 :  02:40:08 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,

The FFT tool does not provide the option for removing the DC offset. Of course, you can create a new column "Y-mean(Y)". However, you can also use the FFT filter to remove the DC offset. You can just use the high-pass filter, set the Cutoff Frequency to zero, and clear the Keep DC Offset check box.

Penn
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mitxlet

France
5 Posts
Posted - 07/27/2011 :  05:25:09 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
OK, thank you for your quick answer. I am going to try it right now !

Mitxlet
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