Surefoot™ Grounding; Figure 2- 4: Using A Surefoot Adapter For Grounding - Tektronix P6245 Manual De Instrucciones

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SureFoot™ Grounding
If you cannot use the low-inductance grounding method recom-
mended, the probe may be grounded to the package under test using
a SureFoot adapter. Refer to Figure 2- - 4.

Figure 2- 4: Using a SureFoot Adapter for Grounding

Use a SureFoot adapter at the end of a short ground lead to connect
directly to the package ground. This method is preferred over using
an adjacent circuit ground because it is the shortest ground path
possible.
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P6245 Instruction Manual