Your Spectrum Analyzer Noise Floor Is Not What You Think

Most RF engineers think their spectrum analyzer is wrong when the noise floor changes — it isn’t. In this video, I walk through two valid measurement methods, explain why the displayed values differ, and show how to interpret the results correctly without confusion. You’ll learn: What “noise floor” really means on a spectrum analyzer Two correct ways to measure it Why the numbers may not look the same How RBW and display settings affect the reading How to avoid common misunderstandings in real measurements This explanation is useful for: RF and microwave engineers Spectrum analyzer users (beginner to intermediate) Anyone learning RF measurement fundamentals If you want more RF measurement fundamentals, check out the channel and related playlists. Chapters 00:00 Introduction and Port Termination 00:45 Method 1 – Noise floor measurement with RBW 01:48 Method 2 – Noise floor measurement with Channel Power 04:14 Key takeaways for real measurements 04:59 Summary for Result Comparing spectrum analyzer noise floor noise floor measurement spectrum analyzer tutorial RF measurement basics RBW noise floor RF test equipment spectrum analyzer fundamentals noise floor explained RF engineering real world RF measurements #SpectrumAnalyzer #NoiseFloor #rfengineering The spectrum analyzer used in this video was loaned by a distributor for demonstration purposes. No payment or editorial control was involved