Show us some odd ignitions from the past
A 10x probe will likely get you there and a 100X probe for sure. Google the specs on the Rigol (you didn't give the model) For the HP just look at the input attenuator switch Here is a shot of an old OLD HP input attenuator. You can see the highest voltage is 20 and that is "per CM" (square) and on the scope it fits there's 8 CM so that's 20 X 8 + 160V peak. A 10:1 probe will get you 1600V. Just be DARN careful you have the probe set correctly, and don't "bump" the switch!!
A 10x probe will likely get you there and a 100X probe for sure. Google the specs on the Rigol (you didn't give the model) For the HP just look at the input attenuator switch Here is a shot of an old OLD HP input attenuator. You can see the highest voltage is 20 and that is "per CM" (square) and on the scope it fits there's 8 CM so that's 20 X 8 + 160V peak. A 10:1 probe will get you 1600V. Just be DARN careful you have the probe set correctly, and don't "bump" the switch!!