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From: Martin Brown <'''newspam'''@nonad.co.uk>
Newsgroups: sci.electronics.design
Subject: Re: Low spec 'scope.
Date: Wed, 28 Aug 2024 15:47:59 +0100
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On 28/08/2024 08:39, Liz Tuddenham wrote:
> The recent thread on high-end oscilloscopes has reminded me of a project
> that I shelved some years ago and might be due for resurrection:  I am
> looking for a real-time display about 3" x 4" that can behave as an X-Y
> oscilloscope with a bandwidth of about 100 Kc/s; a flat panel would be
> ideal.
> 
> Currently I am using an actual X-Y oscillocsope to monitor the output
> from a stereo gramophone cartridge, which allows me to check historic
> discs for damage or faulty recording geometry.  The tube is about 14"
> long, which means it has to be a standalone shelf unit and I can't build
> anything like it into portable equipment.

I think that Daqarta software can probably do about what you want using 
the PC stereo soundcard to digitise X & Y. 100kHz bandwidth might be 
pushing it but it should be fine for audio up to 20kHz.

https://www.daqarta.com/dw_scope.htm

https://www.daqarta.com/dw_0o0j.htm
> 
> I've not come across anything like this, but I'm sure such things either
> exist or can be made by adapting something that is readily available.  I
> have never been down the digital route, so anything that would need a
> lot of programming from scratch will never get built.

I have used it for various demos. The spectrogram is handy too. Even if 
you decide it isn't for you the free signal generator continues to work.


-- 
Martin Brown