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<p>Oscilloscope probes are a type of device commonly used by electrical engineers that can connect a signal source to an oscilloscope. The probe is a single input device that can divert the electrical signal to the scope. Oscilloscope probes can be used in various applications and can range from a simple wire like a passive probe to a more complex device.</p><p>An oscilloscope is considered to be the most used instrument for electrical engineers who need to measure electrical characteristics of electronic devices but you also need at least one probe.</p><h2><h2>Things to consider when choosing probes</h2><ul><li></h2>Ensure the probe's input connector matches the connector on your scope</li><li>Choose a probe whose input resistance and capacitance match the input resistance and capacitance of your scope - matching is critical for guaranteeing proper signal transfer and signal accuracy</li></ul><p>The best approach, for matching a probe with a scope, is to first choose a probe whose capacitance is within the range of your scope and then fine-tune the probe's capacitance by adjusting its compensation network using the probe's trimmer capacitor.</p><p>The 1X probes are suitable for many low frequency applications. They typically offer the same input impedance of the oscilloscope which is normally 1 M Ohm. The most common type of probe with a built in attenuator gives an attenuation of ten, and it is known as a 10X oscilloscope probe.</p><h2><h2>Types of probes</h2><p></h2>Passive probes are the most commonly used probes for taking measurements. They are easy to use, relatively inexpensive, and fairly rugged. Available in the following configurations:</p><ul><li>1x: no attenuation</li><li>10x: factor-of-10 attenuation</li><li>100x: factor-of-100 attenuation</li><li>1000x: factor-of-1000 attenuation</li></ul><p>Attenuation probes serve to multiply the voltage measurement range of the oscilloscope by using an internal resistor that, when used in conjunction with the input resistance of the scope, creates a voltage divider. Useful for the following reasons:</p><ul><li>It allows for the measurement of a signal that might exceed the limits of the oscilloscope</li><li>The attenuation circuitry results in higher resistance and lower capacitance, which is important for high-frequency measurements</li></ul><p>Active probes contain active components, such as FETs or amplifiers. Commonly used for taking high-speed measurements (&gt;500 MHz) or on high-impedance circuits. One limitation is their limited voltage range.</p><p>Differential probes are popular for measuring high-frequency signals or signals of very low amplitude.</p><p>A current probe measures the electrical current flowing through a conductor.</p><h2><h2>Tips:</h2><ul><li></h2>Always use an appropriate probe tip and/or probe tip adapter whenever possible</li><li>Keep ground leads short</li></ul>

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