基于矢量网络分析仪的改进型CE102测试系统校验方法探讨

Discussion on Improved Just-Before-Test Verification Methods with VNA for CE102 Tests System

CE102电源线传导发射是标准GJB 151B-2013的主要项目之一,为了保证测试结果的质量和准确性,正式试验前必须对测试系统进行校验,目前GJB 151B-2013提供的CE102测试系统校验方法只能校验单个阻抗稳定网络,无法发现阻抗稳定网络系统可能存在的潜在的共模以及差模阻抗问题,容易导致错误的测试结果。本文介绍了一种改进型校验测试系统的方法,该方法把阻抗稳定网络系统作为一个整体(包括接地、50Ω终端阻抗)进行校验。最后,在实验室应用中验证了该方法的可行性。

CE102 is one of the main projects of the GJB 151B-2013.In order to ensure the quality and precision of test results,every laboratory must perform verifications.The current verification method is able to only verify each LISN separately,which is not enough to detect common mode (CM) and differential mode (DM) insidious impedance issues with the LISN system and may result in wrong testing.This paper introduces an improved verification method,which validates the whole LISN system as a unit including ground connections,50Ω terminators to verify.Finally,the feasibility of this method is verified in laboratory application.