QA403 Audio Analyzer Tutorial (Noise, SNR, THD+N, ...) - Phil's Lab #130

How to measure noise floor, signal-to-noise ratio, total harmonic distortion, frequency response, and more of an audio electronic system using the QA403 audio analyzer. PCBs by PCBWay https://www.pcbway.com [SUPPORT] Hardware design courses: https://phils-lab-shop.fedevel.education Course content: https://www.phils-lab.net/courses Patreon: https://www.patreon.com/phils94 [GIT] https://www.github.com/pms67 [SOCIAL] Instagram: https://www.instagram.com/philslabyt [LINKS] QA403: https://quantasylum.com/collections/frontpage/products/qa403-audio-analyzer Audio system measurements: https://en.wikipedia.org/wiki/Audio_system_measurements Noise floor and SNR: https://www.masteringthemix.com/blogs/learn/what-is-noise-floor-and-why-does-it-matter#:~:text=In%20audio%20engineering%2C%20the%20noise,wireless%20interference%2C%20and%20equipment%20noise. THD(+N): https://www.ap.com/blog/thd-and-thdn-similar-but-not-the-same/ A-Weighting: https://en.wikipedia.org/wiki/A-weighting Mixed-signal hardware tips: https://www.youtube.com/watch?v=v6fTa6LRJLI Mixed-signal hardware walkthrough: https://www.youtube.com/watch?v=AxEL3eESL9I [TIMESTAMPS] 00:00 Introduction 01:16 QA403 Overview 02:13 PCBWay 03:02 Hardware Overview 04:12 Firmware Configuration 05:26 Test Set-Up 06:14 QA40x Software 08:40 RMS dBV dBu 10:37 Noise Floor 13:56 Common Reference 14:51 Noise Floor (continued) 16:14 SNR 19:59 Frequency Response 22:24 THD+N 26:04 Automated Tests 27:03 Weighting 29:48 Outro

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