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Author Topic: Batronix Magnova: Dirty cheap Scope Curvetracer  (Read 539 times)

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Offline XyphroTopic starter

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Batronix Magnova: Dirty cheap Scope Curvetracer
« on: December 03, 2025, 05:14:21 pm »
Hi Guys,

want to share something... No rocket science, no nobel price worthy thing, just a quick useful hack.

I don't want to pull out my old R&S HMO everytime I want to do a quick curvetrace.

So I made a small hack with the Magnova:
I connected the AWG directly to CH3 which then connects to a 1kOhm resistor and the other side of the resistor goes to CH4 and DUT+ connector. DUT- connects to GND.

Together with a bit of Python Hacking this get's a nice Curvetracer. If Math mode would work in X/Y mode it would also work directly in the scope.

The Python script simply continously reads out CH3 and CH4, applies basic math (no calibration applied or so) and plots it continoulsy on the screen.
Framerate is about 3..5 FPS.

Attached .zip contains the python code. Not a beauty, but does it's job well enough.

Data:
- short circuit protected to 10mA
- +-10V exitation amplitude, +-10mA current range
- be careful, don't inject voltage or so into your scope. E.g. don't connect a charged capacitor to it!
- It is not galvanically isolated! DUT- is directly connected to scope GND

Best regards,

Kai

- The real beauty is, that it enables also to output curvetrace raw data to e.g. excel for further analysis. Hameg does not allow that.
- This simple concept will likely work with other scopes too
« Last Edit: Yesterday at 04:45:40 pm by Xyphro »
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Online mawyatt

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Re: Batronix Magnova: Dirty cheap Scope Curvetracer
« Reply #1 on: December 03, 2025, 05:46:50 pm »
Something that might be of interest (make sure to see #14).

https://www.eevblog.com/forum/testgear/fooln-around-with-dso-awg/

Best
« Last Edit: December 03, 2025, 05:49:59 pm by mawyatt »
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Offline XyphroTopic starter

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Re: Batronix Magnova: Dirty cheap Scope Curvetracer
« Reply #2 on: December 03, 2025, 05:50:07 pm »

Haha, would have been surprised if I'd been the first one with that idea :-D
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Looking for a unique, cheap versatile USB to GPIB adapter with standard USBTMC interface? Build it yourself :-) https://github.com/xyphro/UsbGpib
Too lazy to build one?: https://www.elecrow.com/xyphrolabs-gpibusb.html
Interested in I3C protocol? Check this out: https://github.com/I3CBlaster
 

Online mawyatt

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Re: Batronix Magnova: Dirty cheap Scope Curvetracer
« Reply #3 on: December 03, 2025, 05:58:03 pm »
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Offline Darkover

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Re: Batronix Magnova: Dirty cheap Scope Curvetracer
« Reply #4 on: December 03, 2025, 06:05:17 pm »
Quote from: Xyphro on December 03, 2025, 05:14:21 pm
- be careful, don't inject voltage or so into your scope. E.g. don't connect a charged capacitor to it!

Yes! The Hameg have a little fuse in the component tester. I had to replace it once.  ;)

Olaf
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Offline XyphroTopic starter

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Re: Batronix Magnova: Dirty cheap Scope Curvetracer
« Reply #5 on: Yesterday at 07:09:20 am »

Did not put any there as it would double the BOM costs  :-DD
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Looking for a unique, cheap versatile USB to GPIB adapter with standard USBTMC interface? Build it yourself :-) https://github.com/xyphro/UsbGpib
Too lazy to build one?: https://www.elecrow.com/xyphrolabs-gpibusb.html
Interested in I3C protocol? Check this out: https://github.com/I3CBlaster
 

Offline XyphroTopic starter

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Re: Batronix Magnova: Dirty cheap Scope Curvetracer
« Reply #6 on: Yesterday at 05:13:40 pm »
Added a bugfix above. Actually there was a quite severe one. Now it's fine.
« Last Edit: Yesterday at 06:29:49 pm by Xyphro »
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Looking for a unique, cheap versatile USB to GPIB adapter with standard USBTMC interface? Build it yourself :-) https://github.com/xyphro/UsbGpib
Too lazy to build one?: https://www.elecrow.com/xyphrolabs-gpibusb.html
Interested in I3C protocol? Check this out: https://github.com/I3CBlaster
 
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