330102-00-28-05-02-05 近程探头 用于确定被测件是否符合相应的EMI标准

330102-00-28-05-02-05近程探头是用于配合频谱分析仪查找干扰源的设备。在电磁兼容性（EMI）测试中，远场辐射泄漏测试是常用的方法，用于确定被测件是否符合相应的EMI标准。然而，远场测试通常无法精确地定位辐射问题的来源，例如是来自于壳体的缝隙、连接的电缆，还是USB、LAN等通信接口。
这时，近程探头就派上了用场。近程探头可以在近场范围内测量电磁辐射，帮助工程师定位辐射问题的真正来源。尽管近场探头的测量结果和远场测量的结果无法直接进行数学转换，但有一个基本原理：近场的辐射越大，远场的辐射也必然越大。因此，使用近程探头进行的是相对量的测量，而不是精确的绝对量测量。
此外，近程探头测量的绝对数值意义可能不大，因为这个测试结果与许多变量有关，包括探头的位置和方向、被测件的形状等。因此，在使用近程探头时，工程师需要综合考虑各种因素，以得到准确的测试结果。
总之，近程探头是电磁兼容性测试中非常重要的工具，它可以帮助工程师快速定位并解决辐射问题，从而提高产品的电磁兼容性。

330102-00-28-05-02-05

330102-00-28-05-02-05 Short-range probes are used to find interference sources with spectrum analyzers. In electromagnetic compatibility (EMI) testing, far-field radiation leakage testing is a common method used to determine whether the tested part complies with the corresponding EMI standards. However, far-field testing often fails to pinpoint the source of the radiation problem, such as whether it is coming from a gap in the housing, a connected cable, or a communication interface such as USB or LAN.
This is where the short-range probe comes in handy. Short-range probes can measure electromagnetic radiation in the near-field range, helping engineers locate the true source of radiation problems. Although the results of the near field probe and the far field measurement cannot be directly mathematically converted, there is a basic principle: the greater the radiation in the near field, the greater the radiation in the far field must be. Therefore, the measurement with the short-range probe is a relative quantity, rather than a precise absolute quantity measurement.
In addition, the absolute value of the short-range probe measurement may not be significant, because this test result is related to many variables, including the position and orientation of the probe, the shape of the part being measured, and so on. Therefore, when using short-range probes, engineers need to consider various factors to obtain accurate test results.
In short, the short-range probe is a very important tool in electromagnetic compatibility testing, which can help engineers quickly locate and solve radiation problems, thereby improving the electromagnetic compatibility of products.

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