Simulation of a probe for a scope with an attenuation of 10 times. The 1M // 20pF is the input of the scope. The 100pF is the cable capacitance for 1 meter. The 9M // 13.3pf is inside the probe to create the 10 times attenuation. The 13.3pF is usually a trimmer for frequency response compensation. Change the value of the 13.3pF C to see how the response is with higher and lower values.