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Operating Basics
18
P7240 4 GHz 5X Active Probe User Manual
Ground Lead Length
When you are probi ng a circuit, you should always use as short a
ground lead as possible between the probe hea d and circuit ground.
The series inductance added by the probe tip and ground le ad can
result in a resonant circuit; this circuit may cause parasitic ringing
within the bandwidth of your oscilloscope. Refer to Figure 5.
Low-inductance
Ground
Three-inch
Ground
Figure 5: Waveform distortion from ground lead length
Ground Lead Inductance
When you touch your probe tip to a circuit element, you are
introducing a new resistance, capacitance, and inductance into the
circuit. Refer to Figure 6 on page 19.