330102-00-28-05-02-05近程探頭是用于配合頻譜分析儀查找干擾源的設(shè)備。在電磁兼容性（EMI）測試中，遠(yuǎn)場輻射泄漏測試是常用的方法，用于確定被測件是否符合相應(yīng)的EMI標(biāo)準(zhǔn)。然而，遠(yuǎn)場測試通常無法精確地定位輻射問題的來源，例如是來自于殼體的縫隙、連接的電纜，還是USB、LAN等通信接口。
這時，近程探頭就派上了用場。近程探頭可以在近場范圍內(nèi)測量電磁輻射，幫助工程師定位輻射問題的真正來源。盡管近場探頭的測量結(jié)果和遠(yuǎn)場測量的結(jié)果無法直接進(jìn)行數(shù)學(xué)轉(zhuǎn)換，但有一個基本原理：近場的輻射越大，遠(yuǎn)場的輻射也必然越大。因此，使用近程探頭進(jìn)行的是相對量的測量，而不是精確的絕對量測量。
此外，近程探頭測量的絕對數(shù)值意義可能不大，因?yàn)檫@個測試結(jié)果與許多變量有關(guān)，包括探頭的位置和方向、被測件的形狀等。因此，在使用近程探頭時，工程師需要綜合考慮各種因素，以得到準(zhǔn)確的測試結(jié)果。
總之，近程探頭是電磁兼容性測試中非常重要的工具，它可以幫助工程師快速定位并解決輻射問題，從而提高產(chǎn)品的電磁兼容性。

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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