Using Oscilloscope-Based Bode Plots to Test Power Supply Circuit Stability

Learn how to generate Bode Plot tests to see the phase margin, gain margin, crossover frequency, and other important parameters useful in analyzing the circuit system stability.
April 7, 2026

New App Note shows how to use RIGOL's MHO/DHO5000 series digital oscilloscope to generate the swept signal of the specified range by controlling the built-in signal generator module and output the signal to the switching power supply to carry out Bode Plot loop analysis test. The Bode plot generated from the test can display the gain and phase variations of the system under different frequencies and engineers may find it convenient in analyzing system stability.