[sdiy] Cheap audio spectrum analyzer.. finally..

[Andrew Simper]

Here is the tablet url again without the @ sign: goo.gl/Nj0wYj

On 28 October 2015 at 09:38, Andrew Simper <andy at cytomic.com> wrote:

> So not within the USD 500 budget? How much did it cost in the end? Is it
> small so it easily fits on your desk? Does it have a VGA output port? It
> doesn't run windows and it is a serious bit of kit, around USD 12000 when
> if first came out!
>
> For those not worried about running Windows I would suggest this setup as
> the best value dedicated oscilloscope / signal analyser setup:
>
> Windows 8 tablet with usb2 port = USD 200
> http://www.amazon.com/Windows-Fusion5
> ®-Ultra-Design-Tablet/dp/B00YCX7SGU/ref=sr_1_2?s=pc&ie=UTF8&qid=1445995905&sr=1-2&keywords=acer+windows+tablet+usb+full+size
>
> PicoScope 5000 16-bit usb scope = USD 1155
> https://www.picotech.com/oscilloscope/5000/flexible-resolution-oscilloscope
>
> Total Price = USD 1355
>
> The PicoScope 5000 look like an awesome bit of kit, I've got one of the
> older 12-bit models and it works great, but this one offers either 4
> channels of 8 bit or 2 channels of 15-bit or a single channel of 16-bit, it
> has sweepable signal generators as well as a DAC based arbitrary waveform
> playback output. You could also but a 24-bit usb sound card for really low
> amplitude distortion analysis, it operates all off battery so it's
> portable, and you could configure windows to boot straight into the
> oscilloscope software.
>
> Cheers,
>
> Andy
>
>
>
> On 28 October 2015 at 01:28, Jean-Pierre Desrochers <jpdesroc at oricom.ca>
> wrote:
>
>> I finally decided to go for this:
>>
>> HP 35660A (with option 001 memory installed)
>> http://www.sglabs.it/public/SgLabs_HP%2035660A.pdf
>>
>> It was not cheap but around one third of eBay's mean prices
>> for those working condition HP testers..
>> and the dealer was 1 hour car ride from my home.
>> I think it's a good investment.
>> Ooooff !
>>
>>
>>>>>> 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
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>
>
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