Probe the edge

A scope draws voltage against time. The timebase is how much time each horizontal division covers, and the trigger level is the voltage that pins the edge on the screen. A fast ring after a step lives for a microsecond or two. At 100 µs/div it collapses into the pixel of the edge.

CH1 is a 3.3 V step. Arm the trigger inside the swing, zoom until the edge is a few divisions wide, and call what you see: ringing, broadband noise, or a clean step. New probe moves the probe to another node.