I2S 音频功率放大器的THD测量问题
求讨论:
I2S 接口的音频功率放大器的THD如何测量?
直接的方式,用AP的PSIA接口输出MCLK,BCLK,LRCLK,DATA,如果有控制板,同样可以用光纤,同轴或者模拟输入。
没有 AP的使用方式
(1)使用逻辑分析仪截取 I2S 资料转TXT或是word
(2)使用Labview 分析
https://decibel.ni.com/content/docs/DOC-14221
下载 Realtime Analyzer
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DSSF3 Version 5
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Ver.5.0.2.x
by Yoshimasa Electronic Inc.
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About version 5.0.2.x
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This version includes all updates of DSSF3 until September 2003. (DSSF3 is our best sound measurement/analysis software and is frequently updated.)
Modification from version 5.0.1 is as follows.
Users of DSSF3 version 5 can online update to version 5.0.2.x freely.
Now, DSSF3 LIGHT can be purchased from PayPal.
11 July 2003
Phase meter was added to the FFT analyzer.
请问各位,若是用TAS5706EVM2(配合MC57xxPSIA使用)来测试TAS5706的THD+N 该如何测试呢?