本程序涵盖了确定汽车电子设备辐射抗扰度的推荐测试技术。这项技术使用三片式线路（TPL），其工作频率范围为10 KHz至1000 MHz。该技术仅限于最大高度等于或小于从动元件和外部接地板之间高度的1/3的部件。TPL是TEM电池设计的一种变体，其构造没有电池的侧面。与TEM单元相比，使用TPL的主要优势在于，其结构允许在单元内放置大型设备，并连接相关电缆，而无需TEM单元所需的特殊馈通端口或适配器。 由于TEM单元中没有侧面，因此可以方便地将电缆路由到被测设备（DUT）或从被测设备（DUT）引出。与TEM电池一样，TPL对侧壁反射的磁场没有严重问题。这允许其使用频率高于相同物理尺寸的TEM室。请注意，尽管TPL的构造将均匀电场和磁场的产生限制在500 MHz以下的频率，但经验表明，TPL可在高达1 GHz的频率下使用，并仍能提供合理且可重复的测试结果。只有当本SAE标准中描述的测试设置要求（即DUT加1米电缆）和表征程序允许其使用频率高于相同物理尺寸的TEM电池的频率时，才会出现这种情况。 请注意，尽管TPL的构造将均匀电场和磁场的产生限制在500 MHz以下的频率，但经验表明，TPL可在高达1 GHz的频率下使用，并仍能提供合理且可重复的测试结果。只有遵循本SAE标准中规定的测试设置要求（即DUT加1米电缆）和特性描述程序时，才会出现这种情况。缺少侧壁也意味着TPL必须在射频屏蔽外壳内使用，以防止TPL辐射的射频能量干扰附近的电子设备。为了防止屏蔽外壳内的潜在共振和反射波扭曲TPL内产生的磁场，试验室壁和天花板必须内衬射频吸收材料。 这些问题将在本文正文中进行更详细的讨论。缺少侧壁也意味着TPL必须在射频屏蔽外壳内使用，以防止TPL辐射的射频能量干扰附近的电子设备。为了防止屏蔽外壳内的潜在共振和反射波扭曲TPL内产生的磁场，试验室壁和天花板必须内衬射频吸收材料。这些问题将在本文件正文中进行更详细的讨论。警告——当设备通电时，TPL上及其附近存在危险电压和磁场。试验人员应确保试验过程中试验室内无人。

This procedure covers the recommended testing techniques for the determination of radiated immunity of an automotive electronic device. This technique uses a Tri-Plate Line (TPL) operating over a frequency range from 10 KHz to 1000 MHz. This technique is limited to components which have a maximum height of equal to or less than 1/3 the height between the driven element and the outer, ground plates.A TPL, a variation of a TEM cell design, is constructed without sides to the cell. The primary advantage to the use of the TPL as opposed to a TEM cell is that its construction permits large devices to be placed within the cell with their associated cables attached without special feed through ports or adapters as required for a TEM cell. The lack of sides which would be found in a TEM cell permits easy routing of the cables to and from the Equipment Under Test (DUT).The TPL does not have a serious problem with fields reflected from the side walls as does with the TEM cell. This permits its use to frequencies above that of a TEM cell of the same physical size. Note that although the construction of the TPL limits generation of uniform electric and magnetic fields to frequencies below 500 MHz, experience has shown that the TPL may be used at frequencies up to 1 GHz and still provide reasonable and repeatable test results. This may only occur if the test setup requirements (i.e., DUT plus 1 meter of cable) and characterization procedures, delineated in this SAE Standard permits its use to frequencies above that of a TEM cell of the same physical size. Note that although the construction of the TPL limits generation of uniform electric and magnetic fields to frequencies below 500 MHz, experience has shown that the TPL may be used at frequencies up to 1 GHz and still provide reasonable and repeatable test results. This may only occur if the test setup requirements (i.e., DUT plus 1 meter of cable) and characterization procedures, delineated in this SAE Standard are followed.The lack of side walls also means that the TPL must be used within an RF shielded enclosure to prevent RF energy, radiated from the TPL from interfering with near-by electronic devices. To prevent potential resonances and reflected waves within the shielded enclosure from distorting the fields produced within the TPL, the test chamber walls and ceiling must be lined with RF absorbing material. These issues are discussed in greater detail in the body of this are followed.The lack of side walls also means that the TPL must be used within an RF shielded enclosure to prevent RF energy, radiated from the TPL from interfering with near-by electronic devices. To prevent potential resonances and reflected waves within the shielded enclosure from distorting the fields produced within the TPL, the test chamber walls and ceiling must be lined with RF absorbing material. These issues are discussed in greater detail in the body of this document.CAUTION--Hazardous voltages and fields exist on and near the TPL when the equipment is energized. Test personnel should ensure that no one is in the test chamber during a test.