I'm recording voltage and current waveforms using an oscilloscope. The application is pulsed power.
A problem I am having is the oscilloscope is losing power / turning off when I trigger the system. The oscilloscope is connected to voltage and current probes via coaxial cables. Power is provided to the oscilloscope by a battery-powered-UPS (which is disconnected from mains power during tests).
The oscilloscope can lose power immediately after triggering the system, or a few seconds later. Sometimes it seems to work just fine and I can record the desired waveforms. When the oscilloscope does lose power, it happens both when I measure voltage and current together, and when I measure them individually. When the probes are disconnected and the coaxial cable is lying on the floor, it also picks up a signal.
I think the oscilloscope is being turned off because the signal along the coaxial cables is too strong. I don't want this happen, and am concerned I'm damaging the oscilloscope.
What are some things I can do / need to consider to stop this happening? Even generally, what would cause an oscilloscope to lose power like this, and how would that be rectified?
My background is not electrical engineering so I am a bit lost. Appropriate search terms for me to use would also be helpful, so I can try to do some more self-research.