HP 54710A User's Reference Manual page 38

How the Oscilloscope Works
Choosing Probes
Probe Loading
Figure 1-8 shows a simplified diagram of the circuit with the probe attached
to indicate the principal loading effects. The probe load has both resistive
and capacitive components. In addition to this, the inductance in the probe
ground lead can cause ringing.
Figure 1-8
Simplified equivalent circuit of DUT and probe
1–21