EMC-SRRC certification

SRRC certification is the certification of the National Radio Regulatory Commission. According to the "Regulations on the Administration of Imported Radio Transmission Equipment" and the "Regulations on the Administration of the Production of Radio Transmission Equipment", in order to strengthen the management of the import and production of radio transmission equipment, all radio transmission equipment exported to the People’s Republic of China or within the territory of the People’s Republic of China Radio transmission equipment produced (including trial production) must hold a "Radio Transmission Equipment Type Approval Certificate" issued by the State Radio Regulation Committee and SRRC after the type approval of its emission characteristics.

The type approval code must be indicated on the label of the factory equipment. The testing agency currently recognized by the Radio Administration of the Ministry of Information Industry is: State Radio Monitoring Center (SRMC)

SRRC certified product range:

Mobile communication equipment: 2G/3G base station/terminal/repeater, etc.;

Professional communication equipment: AM transceiver, digital walkie-talkie system base station/car station/handheld station, analog trunking, digital trunking base station/handheld station/repeater, digital transmission radio, microwave equipment, satellite earth station equipment, cordless telephone equipment, Bluetooth equipment, maritime satellite equipment, etc.;

Wireless access equipment: 2.4GHz/3.5GHz/5.8GHz wireless access equipment, etc.

Radar navigation equipment: weather radar, navigation radar, speed radar, aviation navigation equipment, etc.;

Broadcasting and television equipment: FM/AM broadcast transmitter equipment, television transmitter equipment;

Short-distance micro-power equipment: general-purpose micro-power equipment, biomedical telemetry equipment, public walkie-talkies, wireless microphones, etc.;

Various other systems containing radio transmitters.

As above, the traditional products include tablets, mobile phones, Bluetooth speakers and other products that contain wifi, BT, and data terminals.

SAR definition

SAR concept 1: The introduction of the SAR concept: Since various organs of the human body are lossy media, induced electromagnetic fields will be generated in the body under the action of external electromagnetic fields, and the induced electromagnetic fields in the body will generate currents, resulting in the absorption and dissipation of electromagnetic energy. People use the specific absorption rate SAR to characterize this physical process.

SAR concept 2: Specific Absorption Rate: Specific Absorption Rate

It is defined as the electromagnetic radiation (irradiation) energy absorbed by the organism per unit time (s) and unit mass (kg), and its unit is W/kg.

SAR concept 3: SAR measurement mechanism:

It can be seen from the definition that SAR evaluation is performed by measuring the field strength distribution or temperature change. However, it is difficult to carry out SAR evaluation by measuring the temperature rise, and the error is large. Therefore, electric field probes are generally used internationally to measure the field strength distribution for SAR evaluation in order to obtain higher measurement accuracy.

SAR definition: Under the action of an external electromagnetic field, an induced electromagnetic field will be generated in the human body. Since various organs of the human body are lossy media, the electromagnetic field in the body will generate electric current, which leads to the absorption and dissipation of electromagnetic energy. SAR is commonly used in biodosimetry to characterize this physical process. The meaning of SAR is the electromagnetic power absorbed or consumed per unit mass of human tissue, in W/kg.

SAR testing standards and product categories

Product categories: mobile phones, laptops, tablet computers, USB Dongle, Card Bus, etc.

Product communication system: GSM/GPRS/EDGE: 850/900/1800/1900MHz;

HSDPA/HSUPA; CDMA2000, WCDMA,LTE, Wi-Fi; Bluetooth, etc.

SAR testing standards:

International: IEEE Std 1528; IEEE Std C95.1; IEEE C95.3; IEC62209-1; IEC62209-2

United States and Canada: FCC OET65; ANSI C63.19; ANSI C95.1; ANSI C95.3; RSS102;

Europe: EN 50360; EN50361; EN 62209-1; EN 62209-2;

Japan: ARIB STD-T56

Australia: AS/NZS2772.1;

China: YD/T 1664.1

Wireless communication EMC

European Union

In the EU market, the "CE" mark is a compulsory certification mark. Whether it is a product produced by an EU enterprise or a product produced in another country, if you want to circulate freely on the EU market, you must affix the "CE" mark to indicate the product It complies with the basic requirements of the EU Directive "New Methods of Technical Coordination and Standardization". This is a mandatory requirement of EU law on products.

Radio and communication terminal products, testing and certification include:

1. Electromagnetic compatibility test EMC

2. Safety test LVD (in the new directive, this test is also required for battery input RF products)

3. According to European ETSI standard for radio communication equipment test (RF test)

4. Electrical safety and health protection test (Health, SAR assessment)