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ADS1282数据手册中，THD的单位是dB，那么这个单位指的是dBc还是dBFS呢？
另外，我用了TI的频谱分析软件WaveVision 5，里面分析结果dbFS和dBc是不一样的，差了6dB。
一般来说，大家用的都是哪个单位呀？
