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How to measure THD.
How to measure THD.
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Old 11th February 2012, 04:44 AM   #1
smithomo is offline smithomo  Thailand
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Default How to measure THD.

Hi friends,
I'm finding how to know my am
plifier performance in term of THD.
I used the sound card oscilloscope software then my amplifier is about 0.02% @2w and 0.4% @full power.
Are there any another way to do like this with more accurate because of even measured the input signal it shows 0.01%.
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Old 11th February 2012, 04:49 AM   #2
jcx is offline jcx  United States
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Have you tried the free demo version of RMAA, 1st in loopback mode to test your soundcard?

RightMark Audio Analyzer. Products. Audio Rightmark

here's one RMAA test of a US$120 ESI Juli@: RightMark Audio Analyzer test : Juli@ loop

Last edited by jcx; 11th February 2012 at 04:52 AM.
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Old 11th February 2012, 04:53 AM   #3
smithomo is offline smithomo  Thailand
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Quote:
Originally Posted by jcx View Post
Have you tried the free demo version of RMAA, 1st in loopback mode to test your soundcard?

RightMark Audio Analyzer. Products. Audio Rightmark
interesting I will try this one.
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