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

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[LINKS]
QA403: https://quantasylum.com/collections/f...
Audio system measurements: https://en.wikipedia.org/wiki/Audio_s...
Noise floor and SNR: https://www.masteringthemix.com/blogs....
THD(+N): https://www.ap.com/blog/thd-and-thdn-...
A-Weighting: https://en.wikipedia.org/wiki/A-weigh...
Mixed-signal hardware tips:    • Mixed-Signal Hardware/PCB Design Tips...  
Mixed-signal hardware walkthrough:    • Mini 6-Layer Mixed-Signal Hardware De...  

[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