Understanding Probe Compensation

This tutorial explains probe compensation and why it’s essential for accurate oscilloscope measurements. You’ll learn how 10X passive probes use a voltage divider circuit with a variable compensation capacitor to counteract the oscilloscope’s inherent input capacitance. Poorly compensated probes cause amplitude errors and distorted waveforms, particularly affecting rise and fall times of pulsed signals. Step-by-step instructions will guide you through using the scope’s built-in 1000 Hz square wave generator to properly adjust the compensation capacitor until the displayed signal appears rectangular. Moreover, the video shows examples of overcompensated, undercompensated, and properly compensated probe responses.

What you’ll learn:

• Why probe compensation is necessary to achieve a flat frequency response and how uncompensated probes introduce measurement inaccuracies that worsen at higher frequencies
• The step-by-step procedure for compensating a passive probe using the oscilloscope’s built-in square wave reference signal
• How to recognize overcompensated and undercompensated waveforms and when to re-compensate probes, such as after moving them to a different oscilloscope

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