Getting Started with Power Rail Measurements

A practical overview of making accurate low-noise power rail measurements, with tips on probe selection, noise reduction, and bandwidth considerations.

Power efficiency features like power gating and dynamic voltage and frequency scaling or DVFS

Dynamic loads with fast transients

Increased crosstalk and coupling

Switching regulators w/ faster rise times

Application Note Overview

In aerospace and defense systems, where every millivolt matters, ensuring clean and stable power delivery is critical to mission success. Tektronix’s application note, Getting Started with Power Rail Measurements, provides engineers with a practical guide to accurately characterizing DC power rails in complex, noise-sensitive environments. It covers key challenges such as fast transients, dynamic voltage scaling, and high-frequency noise—common in modern SoCs and embedded systems. The guide also explores bandwidth considerations, probe selection, and coupling techniques to help engineers visualize and mitigate power rail noise before it impacts system performance.