The Tri-Plate test method is specified in the surface vehicle standard SAE J1113-25 ”Electromagnetic Compatibility Measurement Procedure for Vehicle Components-Immunity to Radiated Electromagnetic Fields, 10 kHz to 1 GHz” and applicable for testing products such as air-bag control modules, engine and transmission control modules and other subsystems and their associated cables. The EUT height should be less than 1 / 3 of the distance between septum and outer plates. The Tri-Plate Line (TPL) works as an open TEM cell. It is a broadband parallel-plate construction with grounded top and bottom outer plates and an isolated center-plate. When RF signals are input at one end, the TPL will generate an electro-magnetic field between the plates. The opposite end is terminated with a 50 Ω load. A typical test configuration consists of signal generator, power amplifiers, power meters, TPL, 50 Ω load and (absorber lined) shielded room. The TPL 3000 is designed as specified in the SAE J1113-25. The TPL 3000 is shipped in a transportable form with complete assembly instructions for customer on-site installation.
三板式（Tri-Plate）測試方法係依據車輛表面標準 SAE J1113-25「車用零組件對 10 kHz 至 1 GHz 輻射電磁場抗擾度的電磁相容性量測程序」所訂定，適用於測試如氣囊控制模組、引擎與變速系統控制模組，以及其他子系統及其附屬電纜等產品。被測設備（EUT）的高度應小於中心板與外板間距的三分之一。
三板式平行板線路（Tri-Plate Line，簡稱 TPL）為開放式 TEM cell 的運作方式。其為一種寬頻平行板結構，上下兩片外板接地，中間板為隔離板。當射頻訊號從一端輸入時，TPL 將在板間產生一個電磁場，另一端則接有 50 Ω 匹配終端。
典型的測試配置包括：訊號產生器、功率放大器、功率計、TPL、50 Ω 終端負載以及具有吸波內襯的屏蔽室。TPL 3000 的設計符合 SAE J1113-25 的規範，並以可攜式形式出貨，附完整組裝說明，供使用者於現場安裝。
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EMC tests for vehicle components immunity to RF fields
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Meets the requirements of SAE J1113-25 and MES PW 67600A:2001
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Efficient power conversion provides high fields with minimum power
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N-Connectors for 50 Ω line feed and termination load
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針對車用零組件進行射頻電磁場抗擾度的 EMC 測試
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符合 SAE J1113-25 及 MES PW 67600A:2001 標準要求
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高效能的功率轉換，可在使用最小功率的情況下產生高場強
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採用 N 型接頭作為 50 Ω 傳輸線進/出端與終端負載
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Automotive OEM Specifications : Mazda MES PW 67602
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Automotive Standards : SAE J1113-25
