White Paper: Spectrum View vs FFT Frequency Response Analysis

Power supply instability is hard to diagnose when noise, control-loop behavior and load changes interact. See how Spectrum View improves Bode plots, frequency resolution and power-supply validation workflows.
Sept. 16, 2026

Download the white paper to learn how Spectrum View spectrum analysis helps engineers generate more stable, repeatable Bode plots for power supply control loop response measurements. The paper compares traditional oscilloscope FFT analysis with Spectrum View on Tektronix 4, 5 and 6 Series MSOs, showing how independent frequency-domain controls and built-in digital downconverters improve frequency resolution for gain margin and phase margin analysis.

  • Understand why traditional FFT methods can introduce variation in gain and phase plots, especially at higher frequencies.
  • See how Spectrum View uses lower RBW settings and acquisition controls independent of time-domain sampling to refine frequency resolution.
  • Review test examples using buck converter and point-of-load regulator boards to compare FFT and Spectrum View results. 
  • Learn how smoother gain and phase curves can support more confident power supply stability validation.