Oscilloscope probes

Precision Testing Redefined

Oscilloscope probes serve as essential tools in the realm of electronic testing and measurement, acting as the crucial link between the oscilloscope and the device under test. They ensure accurate signal capture, enabling engineers to analyse electrical behaviours with precision. Among these, the oscilloscope current probe stands out for its ability to measure current flow efficiently, offering specialised functionality for dynamic testing scenarios.

What is an Oscilloscope Probe?

Oscilloscope probes are indispensable accessories designed to connect the oscilloscope to the circuit being analysed. They enable precise signal acquisition by minimising noise and distortion, ensuring reliable measurements. 

Oscilloscope probes come in various types, including passive probes, active probes, and specialised probes like the oscilloscope current probe, which is tailored for measuring current. These tools allow engineers to capture and interpret voltage, current, and other electrical parameters across diverse applications.

Types of Oscilloscope Current Probes

1. AC Current Probes

AC current probes are specifically designed to measure alternating current. With their ability to handle high frequencies, these probes are ideal for applications such as motor drives, transformers, and AC power supplies. They ensure accurate waveform representation and facilitate in-depth analysis of dynamic AC systems.

DC Current Probes

For applications requiring precise direct current measurements, DC current probes are the go-to choice. These probes excel in analysing steady-state currents in devices like batteries, solar panels, and DC motor systems, providing accurate and reliable data for engineers.

AC/DC Current Probes

Combining the capabilities of both AC and DC probes, AC/DC current probes are versatile tools that can measure a wide range of current waveforms. These all-in-one oscilloscope current probes are perfect for mixed-signal environments and applications requiring seamless transition between AC and DC current measurements.

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High Common Mode Differential Probes

High Common Mode Differential Probes

The DL-HCM series probes by Teledyne LeCroy are advanced 60 V common-mode differential probes designed for precise power conversion measurements in GaN-based and 48 V systems. Offering bandwidths of 250 MHz (DL02-HCM), 500 MHz (DL05-HCM), and 1 GHz (DL10-HCM), these probes feature 80 V differential and 60 V common-mode voltage ranges, making them ideal for high-power DC-DC converters, AC-DC power supplies, and wireless charging systems. Exceptional accuracy, low noise, and a wide range of tips enhance their versatility and usability.

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Teledyne LeCroy low noise differential probe

Low Noise Differential Probes

The Teledyne LeCroy low noise differential probe collection includes a diverse range of differential probes tailored for high-precision signal measurements. These probes span from low-bandwidth models like the ZD Series (up to 1.5 GHz) and ZD200 (200 MHz) for automotive and general-purpose use, to high-bandwidth options such as the DH Series (8-30 GHz) for PCIe and DDR systems. The WaveLink System (4-6 GHz) offers superior signal fidelity for high-speed DDR signals, while the AP033 Active Differential Probe excels in capturing high-speed differential signals with bandwidth up to 500 MHz. With various tips and compatibility across multiple devices, these probes address diverse testing needs across industries.

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Active Voltage Probes

Active Voltage Probes

The ZS Series high-impedance active probes from Teledyne LeCroy are designed for high-fidelity signal measurements up to 4 GHz. With high input resistance (1 MΩ) and low input capacitance (0.6–0.9 pF), they minimize circuit loading, preserving signal integrity across a wide frequency range. These probes feature ±8 V dynamic range, ±12 V offset capability, and come with a variety of tips and grounding options to handle diverse probing challenges. Their compact design integrates seamlessly with oscilloscopes, ensuring ease of use and accurate performance. Models are tailored for oscilloscopes ranging from 1 GHz to 4 GHz bandwidth.

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HVD3000A series high voltage differential probes

High Voltage Differential Probes

The HVD3000A series high voltage differential probes by Teledyne LeCroy are designed for precise and safe measurements in high-voltage environments. These probes feature exceptional common-mode rejection ratios (CMRR) across a broad frequency range, making them ideal for noisy power electronics. They are capable of measuring up to 7 kV differential voltages with high accuracy (1% gain) and support applications from solar PV systems to electric drives and switch-mode power supplies. The ProBus interface ensures seamless integration with compatible oscilloscopes, offering auto-scaling and no need for additional power supplies. With CAT safety ratings up to 6 kV and wide bandwidths up to 400 MHz, these probes are versatile tools for high-performance testing.

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Teledyne LeCroy AC/DC Current Probes

AC/DC Current Probes

Teledyne LeCroy current probes are precision instruments designed for accurate AC, DC, and impulse current measurements without the need to break circuits. Utilizing a blend of Hall effect and transformer technology, they are ideal for applications like switching power supplies, motor drives, and electric vehicles. These probes feature wide bandwidths up to 100 MHz, peak current capacities up to 700 A, and high sensitivity down to 1 mA/div. Fully integrated with ProBus interface, they ensure seamless operation with Teledyne oscilloscopes, including auto-scaling, degauss, and autozero functionalities. With robust design and no additional hardware required, they deliver reliable performance and precise measurements.

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High Voltage Optically Isolated Probes

The Teledyne LeCroy DL-ISO and HVFO108 probes provide advanced solutions for high-voltage and power electronics testing. The DL-ISO series features up to 1 GHz bandwidth, 1.5% accuracy, and ±60 kV common-mode voltage for precise GaN and SiC device characterization. It supports various tip configurations, including MMCX and square pin connectors, ensuring flexible and reliable measurements. The HVFO108, with 150 MHz bandwidth and 35 kV common-mode voltage rating, excels in floating small signal measurements, offering optical isolation for minimal device loading and superior noise rejection with 140 dB CMRR. These probes are ideal for high-voltage testing, floating signal measurements, and system optimization.

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Rail Probes

The Teledyne LeCroy Active Voltage Rail Probes (RP2060 and RP4060) are precision tools designed for probing low-impedance DC power/voltage rails with minimal signal interference. Offering bandwidths of 2 GHz and 4 GHz, these probes feature ±60 V offset capability, ±800 mV dynamic range, and 50 kΩ DC input impedance, effectively eliminating probe loading. Their low 1.2x attenuation ensures minimal noise, making them ideal for high-resolution measurements with 12-bit oscilloscopes. They include a wide variety of connection options like solder-in leads, coaxial cables, and browser tips, allowing for versatile and accurate signal testing in power integrity applications.

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Frequently Asked Questions

What are the different types of oscilloscope probes?

Oscilloscope probes include passive probes, active probes, and specialised probes such as high-voltage probes. For current measurement, the oscilloscope current probe stands out as a dedicated tool. Each type caters to specific testing needs, ensuring accurate data acquisition across a range of applications.

How do oscilloscope probes work?

Oscilloscope probes are designed to capture electrical signals from a circuit and deliver them to the oscilloscope with minimal distortion. A key consideration on probing of electrical circuitry is the impact of probe loading onto the system, which might distort the signal and/or the circuit design itself.

When should I use an oscilloscope current probe?

An oscilloscope current probe is ideal for dynamic current measurements in power electronics, automotive systems, or telecommunications. Its non-invasive design ensures accurate readings without disrupting the circuit.

Can oscilloscope probes measure both voltage and current?

Standard oscilloscope probes measure voltage, while specialised probes like the oscilloscope current probe are engineered for current measurement. Choosing the right probe depends on the specific parameters you need to measure.

Are oscilloscope current probes compatible with all oscilloscopes?

Most oscilloscope current probes are designed to be compatible with a wide range of oscilloscopes. However, it’s important to check the specifications of both the probe and the oscilloscope to ensure compatibility.

How do I calibrate an oscilloscope current probe?

Calibration of an oscilloscope current probe typically involves using a known reference signal to adjust the probe’s settings for accuracy. Refer to the manufacturer’s guidelines for detailed calibration procedures.

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