I just upgraded from a basic picoscope to a DS1054Z and I have some questions.
For starters, I need to know if I broke the damn thing
![Embarrassed :-[](https://www.eevblog.com/forum/Smileys/default/xembarrassed.gif.pagespeed.ic.zcm3EmNu9T.png)
I wanted to measure the ripple on a huge 250v LC filter I have because my DMM was showing 5V AC ripple on the output and I scoured the manual and the internet and the manual says nothing about DC voltage while a post I found did say that the the 300v RMS input maximum is good for about 400v DC.
I couldn't get the offset to stay still in AC coupling for some reason, it kept shifting downward so I DC coupled it and slowly ramped up the voltage of the LC filter to 250v and above 130 volts or something it would not allow me to see the voltage offset, the line was crammed up against the top of the screen. So I unplugged the thing and used AC coupling instead until I managed to somehow get the offset to stay still, then the osciloscope randomly rebooted for no reason and after rebooting I measured the LC filter again and it was showing about 2mv of a frequency that seemed to be far above the capabilities of the scope to display with strange visual artifacts that looked like lightning flickering across the horizontal line. I don't have a screenshot of this because the LC filter is far from my PC and I don't have a thumb drive on me.
So to make sure I didn't break it I hooked up my picoscope signal generator to the rigol with a square wave and the higher the frequency goes the more I see a double image like this
Did I break it?
![Sad :(](https://www.eevblog.com/forum/Smileys/default/xsad.gif.pagespeed.ic.L3FGyzQrjB.png)