Frequency Analysis issue: pink noise

[waxcylinder]

BUMP - just what do we want to do with this one - is there a FR that can be extracted?

Peter

[steve]

I think the feature request is for a spectrum analyzer with user definable frequency bands (constant percentage bandwidth analyzer), for example, 1, 1/2, 1/3 octave per band.

Please put me down as +1 for this feature (as a new feature and NOT as a replacement for any part of "Plot Spectrum")

[skunkerz]

Moderator note: Please do not piggy back on unrelated topics, start a new thread instead. I spun this one off for you.

I'd really like to reply to the "Frequency Analysis issue: pink noise" thread but it seems locked, so I searched for another open thread with krakatoa in it and here I am.
moderators please forgive me, move my reply to where it belongs or delete it if needed.

krakatoa, I know what you are talking about because i've been thinking exactly the same thing for some time in the past.
I was confused so I had to dig a bit into the matter of how pink noise is shown on the spectrum analyzers...
the solution is so simple you won't believe it: you could see a flat line on the spectrum analyzer only if the frequency axis was in log to base 2.
it's just a matter of visualization, indeed!

a spectrum analyzer with a log x axis that doesn't show pink noise as flat is at best misleading and at worst plain wrong.

so, you would have been right if you had said ...with a log to base 2 x axis...

a spectrum analyzer that behave like this is SMAART

http://en.wikipedia.org/wiki/Binary_log ... sic_theory

cheers

[Gale Andrews]

move my reply to where it belongs

Moved to the topic you were trying to reply to.

Gale