Hey everyone,

I’ve been encountering a consistent noise issue while using the DHO940 oscilloscope and I'm wondering if anyone else has experienced the same problem. Attached are some screenshots for reference. In the images, the yellow signal represents my battery signal measurements, and the blue signal is the sensor analog output. Both signals display the same persistent noise pattern.
Has anyone encountered this before? Any advice on how to fix or troubleshoot this issue would be greatly appreciated.

Thanks in advance!

 

look like common mode noise
could be type of probe/cable and GND connection or something close to scope.
check this out

 

Show us the trace when the probe tip is connected to the grounding clip.

 

panic modeThank you!
This video is really helpful.

I wanted to share an update regarding the consistent noise issue I previously mentioned with the DHO941S oscilloscope. After experimenting with different power supplies and arranging the oscilloscope probe wire in a loop, I noticed a significant reduction in the noise!

These adjustments might be helpful for anyone experiencing similar issues. Please let me know if you have tried these or any other methods that have worked for you. Looking forward to hearing your suggestions and thank you for all the help so far!