Supporting Material

Master precise phase detection with the Moku Lock-in Amplifier and Phasemeter

Featuring: Moku:Pro, Phasemeter, Lock-in Amplifier

In this application note, we demonstrate how to perform both traditional (invasive) and non-invasive stability measurements (NISM) on a voltage regulator (VRTS 1.5) using the Frequency Response Analyzer on Moku:Pro . By comparing the two methods, we show that the NISM technique provides phase margin estimates that closely match those from traditional loop - breaking measurements, while eliminating the need to physically interrupt the circuit . These results confirm that NISM is a reliable and efficient tool for assessing control loop stability, offering engineers a faster and more practical alternative to conventional techniques.

Featuring: Moku:Pro, Frequency Response Analyzer

Cross-correlation a useful technique in signal processing, essentially comparing the similarity of two signals. We discuss its use in signal processing applications. Finally, we present the concept of cross-power spectral density, which is the equivalent of cross correlation in the frequency domain, using the Moku Oscilloscope and Spectrum Analyzer to illustrate several examples.

Featuring: Spectrum Analyzer, Moku:Delta