GB/T 18655-2025 Vehicles, boats and internal combustion engines—Radio disturbance characteristics—Limits and methods of measurement for the protection of on-board receivers

Scope

This document specifies the limits for radio interference and test methods within the frequency range of 150 kHz to 5,925 MHz. This document applies to any vehicles, ships, trailers, equipment driven by internal combustion engines, and any electronic/electrical components used on vehicles, ships, trailers, or equipment driven by internal combustion engines. The details of the frequency distribution in this document refer to the publications of the International Telecommunication Union (ITU) and the actual application situation in China. The limits in this document are used to protect vehicle receivers from interference caused by components/modules in the same vehicle.
The types of receivers protected include: broadcast receivers (audio and television), land mobile communications, wireless telephones, amateur and civilian radio equipment, satellite navigation systems (Beidou, GPS, etc.), WiFi, V2X, and Bluetooth devices. This document does not include content on protecting electronic control systems from radio frequency (RF) emissions, transient or pulsed voltage fluctuations. These contents are included in publications of other standardization committees.
The limits in this document are recommended values and can be modified upon agreement between vehicle manufacturers and component suppliers. This document also applies to components and devices added and connected to vehicle wiring harnesses or vehicle power connectors after the vehicle is delivered for use.
The test methods defined in this document are used to help vehicle manufacturers and suppliers improve the design of vehicles and components to ensure that vehicle radio frequency emissions are controlled at a certain level.
The radiation requirements in this document do not apply to intentional emissions from radio transmitters defined by the ITU, nor to related spurious emissions.
Note 1: This exemption is limited to emissions from intentional transmitters, which a

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