大多数发射辐射测试标准都要求在OATS（开阔场测试）和微波暗室测试，以保证实验的可重复性。然而，为了分析室内电磁环境中计算机辐射对产生的电磁辐射生物效应和实现对计算机辐射信息的侦听、截获以及重现，在实际环境中进行测量是必不可少的。本文通过TektronixTDS5054数字荧光示波器和WCA280A无线通信分析仪搭建了室内电磁环境中的计算机系统的电测辐射测量系统，完成了对计算机系统辐射频谱和时域波形的测量。
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PV092R1K1T1NMM1
PV092R1K1T1NMRK
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PV140R1L1T1NMMC
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PV140R9K1A1NSLCK0173
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PV140R9K1T1NFFCK0011
PV140R9K1T1NFHSK0017
PV140R9K1T1NFRCK0107
PV140R9K1T1NFWSK0032
PV140R9K1T1NFWSK0155
PV140R9K1T1NKCCK0175
PV140R9K1T1NMLCK0081
PV140R9K1T1NSLCK0003
PV140R9K1T1WSCCK0072
PV140R9K4T1NFFPK0088
PV140R9K4T1NZCBK0154
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但一般有哪些行之有效的降低纹波噪声的对策呢？下面我们抛砖引玉，简单讨论常用的八个方法。电源PCB走线和布局反馈线路应避开磁性元件、开关管及功率二极管。输出滤波电容放置及走线对纹波噪声至关重要，如所示，传统设计中由于到达每个电容的阻抗不一样，所以高频电流在三个电容中分配不均匀，改进设计中可以看出每个回路长度相当即高频电流会均匀分配到每个电容中。如果PCB是多层板，可以选择和主电流回路层*近一层覆地，覆地可以有效的解决噪声问题，注意，尽量保证覆地的完整性。
