本文件包含用于道路车辆应用的同轴电缆连接系统的SMB型电气端子、连接器和部件的性能测试程序。这些通常被称为FAKRA II设计。本规范不适用于混合射频连接系统的非射频部分。本规范旨在鉴定在直流至6 GHz频率下工作的密封和非密封射频连接器。SMB/FAKRA连接系统的特性阻抗为50欧姆，但本规范并不排除在非50欧姆电缆或系统上使用这些RF连接器。本规范不适用于单导线或双绞线连接系统。本规范（连同SAE/UCAR 18）旨在提供确保来自不同制造商的组件将在实际条件下可靠地运行。 本规范中包含互配性测试。可能担心可互配性的最终用户有责任要求供应商完成此测试。

This document contains procedures for testing performance of SMB-style electrical terminals, connectors and components for coaxial cable connection systems intended for road vehicle applications. These are often called FAKRA II designs. This specification does not apply to the Non RF portion of a Hybrid RF connection system.The intent of this specification is to qualify sealed and unsealed RF connectors that operate at frequencies from DC to 6 GHz. The characteristic impedance of the SMB/FAKRA connection system is 50 ohms however this specification does not exclude the use of these RF connectors on non-50 ohm cables or systems.This specification does not apply to single conductor wire or twisted pair connection systems.This specification (along with SAE/USCAR 18) is designed to provide the mechanical and electrical data required to insure that assemblies from various manufacturers will perform reliably in actual conditions. There is intermateability testing included in this specification. End users who may be concerned about intermateability are responsible to request the supplier complete this testing.