Re: Low spec 'scope.

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