Keysight PS0004A 350 MHz Optically Isolated Differential Probe

Key Features At A Glance

• Optically isolated design galvanically separates the DUT from the oscilloscope and earth ground for floating measurements
• Bandwidth from 350 MHz to 1 GHz across the three-probe series (PS0004A, PS0006A, PS0008A)
• Maximum common-mode voltage range of ±60,000 V to reject large common-mode signals at floating nodes
• Differential measurements up to ±2,500 V using the appropriate interchangeable probe tip (tips sold separately)
• AutoProbe 1 interface; compatible with Infiniium EXR-Series and MXR-Series oscilloscopes (software 11.70 or higher)
• 2-meter optical fiber bundle cable; certified Class 1 laser system per IEC 60825-1:2014
• UL-certified and Non-CAT (mains isolated) per IEC 61010-031; each probe includes a bipod and SMA wrench

The Keysight PS00xxA series is a family of optically isolated differential voltage probes that galvanically separate the device under test from the oscilloscope and earth ground. This isolation rejects common-mode signals, minimizes noise interference, and eliminates ground loops in high-voltage environments, allowing small signals to be captured accurately even in the presence of large common-mode voltages at floating nodes. The common-mode rejection ratio of an optically isolated probe can be over one hundred million times greater than that of a standard differential voltage probe referenced to earth ground. These probes are not designed for handheld use.

Optically isolated probes are most commonly applied to power-electronic full-bridge and half-bridge architectures, where they support efficiency and performance testing of fast-switching wide-bandgap GaN and SiC devices. Listed applications span semiconductor development of MOSFETs, IGBTs, power converters, inverters, motor drives, and power-management ICs for DC-DC converters and battery management systems; automotive testing of EV powertrains, on-board chargers, and DC-DC converters; aerospace and defense analysis of high-voltage avionics power distribution; debugging of variable-frequency drives and motor controllers in automation, robotics, and HVAC systems; and energy work on photovoltaic inverters, wind-turbine power systems, grid-tied energy storage, HVDC converters, and uninterruptible power supplies.

ValueTronics stocks and holds its own test-and-measurement inventory in a 20,000 square-foot secure warehouse at 1675 Cambridge Drive in Elgin, Illinois. Operating since 1992, we pair that on-hand inventory with specialists who understand isolated-measurement instrumentation.

Brand Heritage

Keysight Technologies traces its roots to Hewlett-Packard's test and measurement business, which was spun off as Agilent Technologies in 1999 and then established as the independent Keysight Technologies in 2014.

Compare Other Models in This Series

The PS00xxA family includes three optically isolated differential probes — the PS0004A, PS0006A, and PS0008A — that share an identical optically isolated architecture and differ principally in bandwidth. All three use a 2-meter optical fiber bundle cable and the AutoProbe 1 oscilloscope interface, and all require a separately purchased probe tip that sets the differential voltage range for a given measurement.

The shared isolation platform gives every model in the series the same ±60,000 V maximum common-mode voltage range and access to the same family of interchangeable MMCX and square-pin tips, so the choice between models centers on the bandwidth required for the signals under test.

Each new model below is its own dedicated product page with condition-matched pricing. Select the model and bandwidth that fit your application, and review that page for its specific availability and price.

The PS0008A is the 1 GHz member of the series and serves as the reference probe for the family's warranted specifications, which are characterized using the PS0008A paired with the PS0017A 10 V MMCX tip. At 1 GHz, it is the widest-bandwidth option in the series.

The three models differ in -3 dB bandwidth: 350 MHz for the PS0004A, 700 MHz for the PS0006A, and 1 GHz for the PS0008A. System noise also scales with bandwidth — for any given tip, the 350 MHz probe exhibits the lowest rms system noise and the 1 GHz probe the highest — as shown in the comparison table that follows.

Differential voltage range and rise time are determined by the chosen probe tip rather than the probe body, so the comparison table presents both the per-model bandwidth and noise figures and the tip-dependent voltage ratings to help match a probe-and-tip combination to the measurement.

Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below.

Accessories Supplied

• Bipod (PS0013-64701)
• SMA Wrench (8710-2466)

Product Core & Specifications

Important: This probe is not designed as a handheld probe due to safety and performance concerns.

Important: A probe tip is required to connect the sensor head to the DUT for measurements. Probe tips are sold separately and vary in voltage performance and connector type — they are not included with the base probe.

Important: Each isolated probe requires the use of a probe tip; when used in combination, the lower electrical rating of the probe and the tip is applicable.

Important: Use of the included bipod (PS0013-64701) is recommended for maximum CMRR performance and for measurement setups with voltages larger than 30 Vrms.

Important: The PS00xxA isolated probes use the AutoProbe 1 interface and are compatible with the Infiniium EXR and MXR-Series Oscilloscopes with software version 11.70 or higher.

Important: The PS0015A performance verification fixture is rated only to a maximum of 30 Vrms / 42 Vpk / 60 VDC and is intended only for deskew and performance verification of the probe — do not use it on voltages higher than this rating.

Recommended pairing: use the PS0014A Isolated Probe Adapter to mount the probe on the Keysight N2787A 3D probe positioner for sturdier positioning and placement.

About this New unit

This is a brand-new, factory-sealed unit, supplied exactly as it arrives from the manufacturer and backed by the full manufacturer warranty. For the exact configuration, available options, included accessories, or current lead time for your application, our Test Architects can confirm the details before you order.

ValueTronics supplies both new and used test and measurement equipment. New units ship factory-sealed, exactly as received from the manufacturer; every used unit is inspected and functionally verified in-house at our 20,000 sq ft secure facility in Elgin, Illinois before it ships. Our Test Architects can help you select the condition, calibration, and configuration that fit your application.

Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.