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Spectrum Analyzer Noise Floor Suddenly Up by 10 dB? Don’t Blame the Front-End Yet

Dec 28, 2025 · 5 min read · One of the most stressful things in the lab is hearing (or saying): “Is the analyzer broken? The noise floor is suddenly 10 dB higher today.” Because this happens a lot.Yesterday the bench looked clean. Same instrument, same frequency range, same cab...

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Stop Saying the Spectrum Analyzer Is “Inaccurate”: You’re Probably Not Measuring the Same “Power”

Dec 21, 2025 · 6 min read · I’ve seen this scene way too many times: Same OFDM signal. Two engineers standing at the same bench.One reads -10 dBm, the other insists it’s -16 dBm.Then the guessing starts—did the DUT change state? Is someone’s instrument “not accurate”? Did someo...

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Spectrum Analyzer Noise Floor Suddenly Up by 10 dB? Don’t Blame the Front-End Yet

Stop Saying the Spectrum Analyzer Is “Inaccurate”: You’re Probably Not Measuring the Same “Power”