Keysight Introduces New PXI Express SMU High Speed ​​Source/Measurement Unit

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Keysight Technologies has launched its first PXI Express source/measurement unit, the M9111A, designed to support the testing and verification of next-generation power amplifiers and front-end modules used in mobile devices and wireless communication systems.

The high-speed M9111A can change voltage, stabilize, and accurately measure microampere currents within just 1 millisecond. Compared to Keysight’s previous standalone SMUs, this PXIe SMU is 20 times faster and more compact, making it ideal for modern testing environments.

Giampaolo Tradioli, Senior Director of Mobile Technology Chip Testing at Germany, commented: “In automated test environments for power amplifiers, speed is crucial. The introduction of the M9111A PXI module significantly enhances our product lineup, helping us meet the growing demands for fast testing. It not only offers exceptional speed but also features stable output and smooth operation, even under high capacitance conditions up to 150 μF. This makes it an excellent choice for testing power amplifiers in mobile devices.”

Power amplifiers often generate fast pulse currents, which can challenge traditional SMUs. However, the M9111A delivers industry-leading transient performance, effectively suppressing voltage sags caused by pulsed loads and quickly returning to the programmed voltage level.

Traditional SMUs may become unstable under extreme and dynamic load conditions, but the M9111A ensures outstanding output stability, eliminating concerns about power supply interference during measurements. Its uninterrupted operation guarantees the safety of the device under test when adjusting output and measurement ranges. Even with high capacitance, the output remains stable, preventing damage to the tested device.

The single-slot, two-quadrant PXIe SMU module provides up to 18W of power and supports configurations such as 13V ±1A or 6V ±3A. Functionally, the M9111A can act as both a voltage and current source, as well as an ammeter and voltmeter. Key measurement capabilities include:

• Fast settling time for measuring rapid voltage changes
• Quick recovery after abrupt changes in pulse current, minimizing voltage drop
• Accurate and fast measurement of low currents, such as leakage current

The M9111A is part of Keysight's RF power amplifier and front-end module reference solution, enabling quick and comprehensive characterization of next-generation power amplifier modules. It supports S-parameter analysis, demodulation, power, adjacent channel power, and harmonic distortion measurements.

For more information on the M9111A, visit [website] or contact Keysight directly. To view images of the M9111A, please visit [image link].