老虎鱼音频 LCD数显宽频交流噪音测试仪 LHY AUDIO WIDEBAND POWERLINE NOISE ANALYZER 宽频交流电噪声分析仪 OVER-RANGE SENSITIVITY 超出范围 灵敏度 Plug into an unfiltered outlet and set the sensitivity to 100.Then move the plug to a filtored outlet to see the relative nolse reduction. 桥入未经滤波的播座并调管灵敏度旋恒使读为100， 然后再插到经过诚波的新强上甲可查看图对降峡比率 Made in China 测试噪声/300KHz-700KHz频段 市电交流电源噪音纹波表EM测量仪分析仪