[sdiy] Cheap audio spectrum analyzer

[Jean-Pierre Desrochers]

> Again, what do you mean by "cheap"...? What is your budget, and what
> level of performance do you want to measure?

Lower than $500.



Le 2015-10-26 11:18, Neil Johnson a écrit :

> Jean-Pierre Desrochers wrote:
> 
>> Do you know of a cheap audio spectrum analyzer I could buy to check 
>> 20-20khz frequency response on audio stuff ?
> 
> Define "cheap".
> 
>> That would includes sinus generator + analyzer in the same box.
> 
> Ok.
> 
>> I checked on eBay and most analyzers are RF band based and are so 
>> $$$$$ expensives. But 2 things:
> 
> You're looking for the wrong kind of thing.
> 
>> - I don't want to use analysis software on a separate PC - Any DIY 
>> projects with micro/graphic LCD would do.. I want a standalone 
>> analyzer.
> 
> Well, for a complete standalone box I would recommend an HP Dynamic
> Signal Analyser, such as the venerable 3561A, or something a little
> more modern such as a 35660A. Pros: all-in-one, built-in screen, will
> do amplitude and phase response. Cons: dynamic range ok but won't get
> down to the very low levels of noise and distortion.
> 
> The next step up would be audio analysers, such as the HP 8903 or
> something from Audio Precision. While the 8903 does have a built-in
> computer and can do sweeps, the display is 7-seg LED so you'll need a
> pencil and some graph paper. The Audio Precision kit needs an
> external control computer, but can measure the very lowest noise and
> distortion.
> 
> Again, what do you mean by "cheap"...? What is your budget, and what
> level of performance do you want to measure?
> 
> Neil
> --
> http://www.njohnson.co.uk [1]



Links:
------
[1] http://www.njohnson.co.uk