Agilent Technologies 54831A User's Quick Start Manual page 26

Figure 1-12
Signal
Probe Tip Isolation Network
The loading effect of the probe tip on the circuit under test is represented by
the circuit is shown in the equivalent load schematic in Figure 1-13.
Figure 1-13
Signal
Equivalent Load including oscilloscope
250 Ω
90.9 kΩ
8.2 pF
370 Ω
1.5 pF
Setting Up the Oscilloscope
Digital probe lead set
To Oscilloscope
100 kΩ
7.4 pF
1-19