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Old 18th September 2011, 12:15 PM   #1
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Default noise floor analyser

Hello,
I made an audio analyser specifically to measure a DAC noise floor. It can measure a noise floor downto -165dBFs. Is is used like a sound card and the FFT is done is a computer.

totaldac analyser

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Old 18th September 2011, 11:00 PM   #2
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I've tried the link but it times out for me, so can't make a judgement on it.

Tony.
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Old 18th September 2011, 11:07 PM   #3
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Quote:
Originally Posted by wintermute View Post
I've tried the link but it times out for me, so can't make a judgement on it.

Tony.
I don't understand, it should work well:
Totaldac noise analyser
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Old 18th September 2011, 11:27 PM   #4
kevinkr is offline kevinkr  United States
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Quote:
Originally Posted by wintermute View Post
I've tried the link but it times out for me, so can't make a judgement on it.

Tony.
Link in first post seems to work OK for me..

In real terms the noise floor shown IMHO is exceptionally low, wondering how that was accomplished.
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Old 18th September 2011, 11:39 PM   #5
kevinkr is offline kevinkr  United States
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This is essentially an advertisement for what is an interesting product, nonetheless it belongs in the commercial forums. Hence its move to vendors bazaar.
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Old 19th September 2011, 09:47 AM   #6
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This is essentially an advertisement for what is an interesting product, nonetheless it belongs in the commercial forums. Hence its move to vendors bazaar.
Sorry for having chosen the wrong category.
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Old 19th September 2011, 09:57 AM   #7
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Originally Posted by kevinkr View Post
wondering how that was accomplished.
The efforts where done mainly on the analog front end amplifier, multiple galvanic isolation to get the same result even when the equipment under test is connected to earth, in the ground/earth routing and in the power supply noise.

Yes it has become a commercial product, but for DIYers it can be an alternative to expensive high end audio analysers.
For DIYers high level measurements can be done by a sound card but very low noise measurement can't be done properly by a conventional sound card.
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