| DVD视盘机电磁辐射干扰的测试分析及对策 |
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| 引用本文： | 刘晓亮,郎淳强,牟建华. DVD视盘机电磁辐射干扰的测试分析及对策[J]. 安全与电磁兼容, 2009, 0(2): 57-61 |
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| 作者姓名： | 刘晓亮 郎淳强 牟建华 |
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| 作者单位： | 中国华录松下电子信息有限公司 |
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| 摘 要： | 介绍了DVD视盘机电磁辐射产生的机理和原因，通过测试数据的比较分析对辐射源及耦合路径进行定位，并利用改变解码PCB板的接地方式、改善不同模块间互连线缆的空间分布位置、使用磁珠及电容对时钟／电源走线进行滤波处理、强化机器外壳的屏蔽效能等方法对辐射进行抑制。改进后的产品经测试符合FCC Part15 Class B的要求，并有6dB以上的裕量，
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| 关 键 词： | DVD视盘机 辐射骚扰场强 接地 滤波 屏蔽 耦合 |
Measurement Analysis and Countermeasures of Electromagnetic Radiation Interference Caused by DVD Player |
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| Liu Xiaoliang,Lang Chunqiang,Mou Jianhua. Measurement Analysis and Countermeasures of Electromagnetic Radiation Interference Caused by DVD Player[J]. Safety & EMC, 2009, 0(2): 57-61 |
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| Authors: | Liu Xiaoliang Lang Chunqiang Mou Jianhua |
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| Abstract: | The mechanism and reasons of electromagnetic radiation caused by DVD player are mainly introduced. By comparing and analyzing of measurement data, the locations of radiation sources and coupling paths are found out. Variety of countermeasure methods are utilized to suppress EMI emission, such as changing the grounding distribution on decoding PCB, improving the spatial distributions of interconnected cable between different modules, using beads and capacitors as filters on clock traces and power supply traces, strengthening shielding efficiency of cabinet and so on. The testing result accords with the requirements of FCC Part15 Class B standard completely after improving, and the margin is more than 6 dB from limit. |
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| Keywords: | DVD player radiation disturbance field strength grounding filter shield coupling |
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