GB13614-2012

Electromagnetic environment requirements for-Short-wave radio receiving and direction finding stations

短波无线电收信台（站）及测向台（站）电磁环境要求

GB 13614-2012 é uma norma nacional chinesa obrigatória vigente: Electromagnetic environment requirements for-Short-wave radio receiving and direction finding stations. Setor: Eletrônicos. Foco: Segurança de produtos. Entrada em vigor: 1 de abr. de 2013.

A aplicabilidade depende do escopo do produto, da via de certificação, dos avisos da autoridade competente e das regras de transição. Solicite uma tradução ou verifique a fonte antes de usar este registro em uma decisão de conformidade.

Visão geral de conformidade

Esta visão geral está disponível por enquanto apenas em inglês.

Escopo e aplicabilidade

This standard specifies the electromagnetic environment requirements for short-wave radio receiving stations and radio direction finding stations. It is applicable to fixed radio centralized receiving stations and fixed radio direction finding stations operating within the frequency range of 1.5 MHz to 30 MHz. It does not apply to mobile or temporary radio stations. It references GB/T 7349-2002 for related measurement methods.

Requisitos técnicos

The standard categorizes short-wave radio receiving stations into three protection levels—Level 1, Level 2, and Level 3—based on their administrative subordination, business nature, communication distance, and equipment functions. It establishes the mandatory protection distances that must be maintained between these stations and various radio transmitting stations, including medium-wave, long-wave, and short-wave transmitters. Compliance with these spacing requirements is mandatory to ensure normal station operation. Furthermore, the standard outlines protection requirements against common electromagnetic interference sources. This includes specific spacing mandates for high-voltage overhead lines, different classes of highways, and industrial, scientific, and medical (ISM) equipment. The standard also provides guidelines for areas outside the 3dB lobe width of directional antennas. For radio direction finding stations, the standard defines strict electromagnetic environment protection forbidden zones and protection control areas. It details protection distances against various obstacles and interference sources, including overhead distribution lines, electrified railways, tall metal buildings, and natural features like ponds and rivers. Engineers must ensure no interference sources or obstacles exist within the designated protection zones.

Métodos de ensaio

The standard primarily relies on geometric spacing and theoretical calculations rather than traditional laboratory testing. However, it references GB/T 7349-2002 for the measurement of radio interference from high-voltage overhead power lines. Appendix A provides recommended calculation methods for determining protection distances, including evaluating interference from passive obstacles (like vertical grounding conductors) and using signal-to-noise ratio calculation methods for high-voltage overhead transmission lines and ISM equipment.

Perguntas frequentes

What products are regulated under GB 13614-2012?

It applies to fixed radio centralized receiving stations and fixed radio direction finding stations operating within the frequency range of 1.5 MHz to 30 MHz.

Are there any updates from the previous version of GB 13614-2012?

Yes, it replaces GB 13614-1992 and GB 13617-1992. Key technical differences include a modified calculation formula for the protection distance against high-voltage overhead power lines, and the harmonization of protection distances for medium and short-wave transmitting stations.

How is protection distance determined under special circumstances?

When it is difficult to meet the standard spacing requirements, engineers can use the recommended calculation methods in Appendix A or conduct measurements of the actual radio interference sources and obstacles, coordinating based on social, economic, and technical factors.

The summary above provides a high-level overview of GB 13614-2012. To ensure complete compliance for your facilities entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 13614-2012 today to access all detailed parameters, tables, and calculation formulas.

Indicações de aplicabilidade

Tipo: Segurança
CCS: L06
ICS: 33.100
Órgão competente: Ministry of Industry and Information Technology
Comitê técnico: Ministry of Industry and Information Technology

Relações

Substitui:GB 13617-1992, GB 13614-1992