Tektronix Thermometer P7240 Manuel d'utilisateur télécharger pdf (Page 28)

Operating Basics

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 head 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.

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Tektronix Thermometer P7240 Manuel d'utilisateur Page 28