Input Impedance And Probe Loading - Tektronix P6246 Mode D'emploi

Figure 2: Using the short ground contact

Input Impedance and Probe Loading

When you connect the probe inputs to a circuit, you are introducing
a new resistance, capacitance, and inductance into the circuit. Each
input of the P6246 and P6247 differential probes has a characteristic
input impedance of 100 kΩ to ground in parallel with less than 1 pF.
See Figure 3.
For signals with low source impedance and frequency, the 100 kΩ
input impedance on each input is large enough to prevent the inputs
from loading the signal sources. The greater the source impedances
and the higher the signal frequencies, the more you should take these
factors into account.
P6246 & P6247 Instructions
Operating Basics
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