noise question

Is there a simple explanation for how to use noise figure? For
example, if a component advertises 3nV/ sq rt Hz, do I just plug in
the bandwidth I'm running it at ,take the sq rt and multiply it by the
nV for my noise density? What would I see on my scope? I 've got
several electronics books but none seem to explain how to use these
figures to predict what noise level I will see,at least not in any
easy to understand way. Any help? Thanks ahead. jm

 

A lot of gibberish. You need a spectrum analyser ti see how the noise
actually varies with frequency. The scope only give you a rough idea of
the average and peak values of the noise.


Kevin Aylward

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Understanding is that quality which results when
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