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 time series data converts to power spectral		  New Topic  Reply to Topic
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uclabme

USA
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Posted - 02/27/2006 :  01:30:55 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Version (Select Help-->About Origin): 7.5
Operating System: XP

Hello, Experts,

I have data of voltage output variance over long period of time. And I'd like to do a power spectral graph(voltage amplitude over frequency). Is there anyway I can extract that information without running the experiment again? for example use FFT first then...? or must I use a spectrum analyzer?

thank you for clarifying.

ck

Leo_Li

China
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Posted - 02/27/2006 :  05:17:49 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi ck,
Try this:
1. hightlight voltage data column.
2. choose menu: analysis -> FFT. Click "OK".
a new worksheet is generated, in which the 1st col is frequency and the 4th col is amplitude.
this is what you want?

Leo
OriginLab Corp.
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