I have a question for you.
If I have a signal that is DC biased at somewhere, let's say, -35Vdc carrying "a" pulse, just "ONE" pulse of 200mV Peak to Peak,
What setting of the oscilloscope would you set to capture the pulse clearly?
I thought, the answer could be very educational, in the hope that members who read this post of "yours" would miss "no pulse" in future.