The P5200 bandwidth is 25 Mhz, Input Impedance at the Probe Tip is 4 MΩ / 7 pF. The P5200A bandwidth is 50 Mhz, Input Impedance at the Probe Tip is 5 MΩ / 4 pF Here is an example of a fast rise time signal being measured on both probes and as you can see the new probe reduces the ringing.