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SolderSmoke Daily News

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The Importance of Keeping the Noise FLAT

Posted: 05 Nov 2021 03:11 AM PDT http://soldersmoke.blogspot.com/2021/11/the-importance-of-keeping-noise-flat.html

 A few days ago I put up a blog post about using a noise generator (in my
case my cheap FeelTech sig generator) and my TinySA spectrum analyzer to
look at the passband of a crystal filter.  I was using the 9 MHz filter
used by Dean KK4DAS and the Vienna Wireless Makers Group.  The idea is
simple: insert broadband noise into the input. The filter should pass more
of the noise that falls within its

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