Introduction of laboratories of

National Telecommunication Metrology Station

Quality Supervision Test Center for Telecommunication Electromagnetic Compatibility of MII was established on December 21, 2001. The laboratory facilities in the Center was built since 1997 and finished at the end of 1999.

The main EMC test site and test system of the lab includes ：

•  One 10m semi-anechoic chamber (23.18m x 16.88 m x 9.6 m);

•  One 3m full-anechoic chamber (6.80m x 3.08 m x 3.53 m) ;

•  7 shielded rooms as well as a full set of advanced EMC test equipment.

In 1999, the lab passed the accreditation assessment of China National Accreditation for Laboratories (CNAL). In Jan. 2001, the lab passed the scope expansion by CNAL. The expanded scope includes: EMC test for GSM mobile phone and ancillary equipment, EMC test for information technology equipment, EMC test for telecom power source equipment, EMC test for telecom terminal equipment, EMC test for telecom testing instrument and EMC test for industrial, scientific and medical (ISM) equipment. In October 2001, mobile phone electromagnetic radiated emission (SAR) test passed the scope expansion assessment by CNAL. In March 2003, safety test for information technology equipment passed the scope expansion assessment by CNAL. In August 2005, conformance test for mobile terminal also passed the scope expansion assessment by CNAL.

The lab also leads in the industry in getting international accreditation.

•  The lab became listed lab of FCC in September 2000.

•  In Jan. 2001, the lab obtained the accreditation by Germany accreditation organization – DAR according to ISO/IEC 17025 and passed the scope expansion accreditation and surveillance assessment in Feb.2002, August 2003 and Feb.2005.

•  In August 2005, the Antenna Performance Test Lab became CTIA Authorized Testing Lab - CATL . The Antenna Performance Test Lab fully conforms to the requirements of CTIA (Cellular Telecommunication and Internet Association) for mobile terminal antenna test. It became the first independent third-party testing lab for RF performance (TRP) and receiving performance (TIS) testing of mobile communication equipment. It is also one of the first CTIA Authorized Testing Labs (CATL) in Asia as well as one of the first authorized testing lab for TRP and TIS for GPRS and EGPRS equipment.

•  In September 2005, the lab became Wi-Fi authorized testing lab. It is the first lab authorized by Wi-Fi Alliance.

•  In 2005, the lab became member of GCF and WiMAX Forum .

By now, the testing scope of the lab covers most of the telecom equipment, information technology equipment and ISM (industrial, scientific and medical) RF equipment. Through international accreditation, testing reports of the lab are accepted by most countries and regions in the world. In recent years, the lab has provided test service for products of many enterprises that will be exported to the overseas market.

Since 2000, telecom equipment (mainly wireless communication equipment, including mobile phone and base station as well as telecom power source equipment, cordless telephone equipment, fixed wireless link equipment and xDSL equipment, etc.) that will enter the national public telecom network should be sent to our lab for network access license test, appointed by the Telecom Equipment Administration Bureau of the Ministry of Information Industry.

Most of the test engineers in the lab got trained for EMC test by CNAL; some engineers also got trained by several outstanding European test certification organizations in EMC, safety, wireless, electromagnetic radiated emission t est as well as laboratory management . Some have become experts in the industry. By now, many engineers in the lab are also member of CISPR and IUT, who have made many contributions and provided basis from experiments for the proposals.

Since the operation of the lab, number of the products tested in the lab exceeds several thousands. The lab also undertakes the quality inspection and test of EMC for large amount of telecom equipment required by the Telecom Equipment Administration Bureau of the Ministry of Information Industry, ensuring the quality of the telecom network equipment. As the test data of the lab is widely recognized in the world, test for clients native and abroad also provide good service for the export of products in telecom and electronics manufacture industry. Telecom and electronics products tested in the lab have been exported to many areas such as Europe, America and Asia Pacific.

Meanwhile, the lab is also active in the drafting of EMC standards for telecom and electronic industry. Standards issued include:

•  YD/T 968 “ Limits and methods of measurement of electromagnetic compatibility for telecommunication terminal equipment ”

•  YD/T 983 “ Limits and methods of measurement of electromagnetic compatibility for telecommunication power supply equipment ”

•  YD/T 991 “Limits and methods of measurement of electromagnetic compatibility for digital transmission analyzers”

•  YD 1032 “ Limits and Measurement Methods of Electromagnetic Compatibility for 900/1800MHz Digital Cellular Telecommunications System Part1: Mobile Station and Ancillary Equipment ”

•  YD 1103 “Requirements and Measurement Methods of Electromagnetic Compatibility for Cordless Telephone”

•  YD 1138 “Electromagnetic Compatibility Requirement and measurement methods for Fixed Radio Links and ancillary equipment”

•  YD 1139 “Requirement and Measurement Methods of Electromagnetic Compatibility for 900/1800MHz TDMA Digital Cellular Telecommunications System Part 2: Base Station and Ancillary Equipment”

•  YD 1169.1 “Requirement and Measurement Methods of Electromagnetic Compatibility for 800MHz CDMA Digital Cellular Telecommunications System Part 1:Mobile Station and Ancillary Equipment”

•  YD 1169.2 “Requirement and Measurement Methods of Electromagnetic Compatibility for 800MHz CDMA Digital Cellular Telecommunications System Part 2:Base Station and Ancillary Equipment”.

Standards that we participated in the drafting also include “General Requirements of Electromagnetic Compatibility for Radio Equipment”, “General Requirements of Electromagnetic Compatibility for Telecom Network Equipment”, “General Requirements of Electromagnetic Compatibility and Testing Methods for Telecom Network Equipment”, “General Requirements of Electromagnetic Compatibility and Testing Methods for Short-distance Radio Emission Equipment”, “General Requirements of Electromagnetic Compatibility and Testing Methods for xDSL equipment”, etc., which set up the national standard system and planning for the Electromagnetic Compatibility standards in telecom and electronic industry. Also, the lab drafted tens of technical documents such as testing implementation rules, testing methods, etc.

The lab is active in the drawing up of WLAN standards in both national and international standard organizations, playing an important role in the technical field in WLAN technologies and testing techniques, participating in the drafting of many WLAN technical and testing standards, such as the series of standards of WLAN technical requirements and equipment testing methods for public WLAN in CCSA (China Communication Standard Association), testing methods for convergence equipment of WLAN and cellular network, interoperability methods for Wi-Fi audio product, interoperability methods for consuming electronic product with Wi-Fi function, interoperability methods for WLAN high-speed transmission 802.11n equipment, etc. in Wi-Fi Alliance.

Also, the lab is active in the drawing up of safety and protection standards, playing an important role in the technical field in safety and protection technologies and testing techniques, participating in the drafting of many relative standards, such as YDN 127-2005 “Safety Guidelines for Telecom Equipment”, “Resistance test for excessive voltage and current of telecom equipment”, “Resistance test for excessive voltage and current of insulation transformer”, etc.

As part of the National Telecommunication Metrology Station, the lab also undertakes metrology calibration work for wireless communication instrument. The National Telecommunication Metrology Station was set up in October 20, 1992 according to the Document No. (1992) 460 “Notification of the establishment of the National Telecommunication Metrology Station” issued by the former National Technical Supervision Bureau. In service, it is under the leadership of the National Technical Supervision Bureau, undertaking the metrology calibration of telecom metrology instrument in the whole country authorized by the National Technical Supervision Bureau.

The major responsibilities of the National Telecommunication Metrology Station are to research and set up the top national metrology standards authorized by the National Technical Supervision Bureau, top telecom metrology standards for the ministry of Information Industry and relative quality testing system for telecom products, research on telecom testing technologies, testing measures and testing methods, draw up relative testing standards, telecom metrology verification regulations and other technical specifications for telecom products, train telecom metrology testing engineers, perform calibration of telecom instruments and quality supervision and testing on telecom products.

Wireless, microwave instrument calibration capabilities

Wireless communication synthesis tester, signal generator, spectrum analyzer, network analyzer, vector signal analyzer, wireless channel simulator, noise and interference simulator, static discharge generator, field sensor calibration system, microwave power meter, power sensor, signal generator, function generator, receiver, RF cable tester, noise co-efficient analyzer, etc.

•  Lab 2 (EMC) is mainly responsible for the calibration and verification of wireless instrument

•  The lab is equipped with Level 1 industry standard: high-frequency voltage standard, power standard

•  High accuracy testing instrument: test receiver 8920, spectrum analyzer PSA, power meter EPM/NRT, vector signal analyzer 89650S, FSIQ, vector signal source E4438C, high-performance RF source 8257D, signal source analyzing system E5052(SSA), 40GHz signal source SMP04, 40GHz spectrum analyzer FSU46, etc. ...

•  RF signal testing capability can reach 40GHz

•  Power testing capability can reach -130dBm

•  Advanced digital modulation testing and calibration

•  High-accuracy phase noise testing standard

•  Wireless channel simulator calibration changed the situation that this type of instrument could only be sent to other countries for calibration in the past.

•  Self-developed automatic calibration system for signal source, network analyzer and digital wireless synthesis tester features with high accuracy and high repeatability

•  Automatic test

Most of the wireless synthesis tester features with automatic test with self-developed programs. Through testing verification and modification of the software for many years, the system has calibrated wireless synthesis tester (8960, CMU200, 4201, 4107, 8922, CMU300, MT8801, CMD55, CMD57) for several thousands sets. The system features with high speed, stable operation and high accuracy. Testing engineers have rich experience in calibration area.

•  All parameters can traced to the national standards

Items accredited by CNAL

•  wireless synthesis tester (analogue), GSM digital wireless synthesis tester, CDMA digital wireless synthesis tester, PHS digital wireless synthesis tester, signal source, spectrum analyzer, network analyzer, vector signal analyzer, wireless channel simulator, noise and interference simulator, static discharge generator, field sensor calibration system, microwave power, RF attenuator, filter, coaxial cable, field strength tester, etc.

Our customers include:

MOTOROLA Beijing, NOKIA, Bird, Lenovo, Vkmobile, Eastcom, Huawei, Capitel, Datang mobile, ZTE, Hebei Mobile/Unicom, TCL, CTTL, National Radio Supervision Bureau, etc.

Development progress

Testing service

•  Conducted emission test

•  Radiated emission test

•  Emission power test

•  Conducted spurious emission test

•  Radiated spurious emission test

•  Harmonic current test

•  Voltage fluctuant and flicker test

•  Radiated, radio-frequency, electromagnetic field immunity test

•  Electrostatic discharge immunity test

•  Power frequency magnetic field immunity test

•  Surge immunity test

•  Electrical fast transient / burst immunity test

•  Immunity to conducted disturbances, induced by radio-frequency fields

•  Voltage dips, short interruptions and voltage variations immunity test

•  Antenna RF power and receiving sensitivity test

•  Antenna gain direction chart and antenna gain factor test

•  WLAN equipment RF performance and Wi-Fi interoperability test

•  Electromagnetic radiated emission (SAR) test

•  Electromagnetic shielding performance test

•  RF and conformance test for GSM and WCDMA mobile terminal

•  WLAN equipment performance and conformance test

•  Information technology equipment safety test

Telecom Equipment that can be tested

A. Wireless communication equipment

1 Base station and equipment

2 GSM mobile station and ancillary equipment

3 CDMA mobile communication system

4 WCDMA mobile terminal

5 Wireless access equipment

6 WMAN equipment

7 Other wireless equipment and telecom network equipment

B. Telecom network equipment

1 Exchange system, transmission system, router, IP equipment

2 Power equipment

3 Network monitoring equipment

C. Telecom terminal equipment

1 Cordless telephone set

2 Telephone set

3 ISDN terminal

4 Computer network equipment (all kinds of network adapting card, etc.)

5 Other terminals (computer, modem, etc.)

6 IC card telephone set, magnetic card telephone set

D. Other equipment

1 Computer and ancillary equipment

2 Telecom testing instrument

3 Wireless earphone and audio equipment

4 Information electronic home appliance

Testing scope

EMC: EMC test for Network Access License, CCC, CE, FCC as well as non-type approval test: information technology equipment, telecom equipment (network and terminal, etc.), medical instrument, industrial and scientific equipment, power equipment, monitoring, safe-guard and alarm system, billing equipment, vehicle equipment, electrical tool, electrical toy, illumination appliance…

Safety: Safety test for Network Access License, CCC, CE as well as non-type approval test

Radiated emission: EMF (Electromagnetic Field) test and technical consultation (Network Access License, CE, FCC as well as non-type approval test), test of radiated emission of all kinds of wireless communication terminal, field test for electromagnetic environment ( 0 Hz - 40 GHz ): high-voltage power line, transformer, transceiver and mobile communication base station, electromagnetic shielding performance of civil and military-used shielded room, acceptance test for anechoic chamber (shielded performance, field attenuation, reflectance level and field uniformity).

Wireless calibration: metrology and calibration of wireless communication instrument: signal source, spectrum analyzer, synthesize tester, scalar and vector network analyzer, audio source./analyzer, vector signal analyzer, testing receiver, attenuator/cable, filter, power slitter, power meter, power sensor, RF cable tester/resistance tester, wireless channel simulator, noise and interference simulator…

Wireless RF test: RF performance test for mobile terminal such as GSM mobile phone, WCDMA mobile phone, Bluetooth equipment, Wi-Fi equipment, DECT telephone as well as wireless network equipment such as mobile station and repeater, etc.

WLAN test: First Wi-Fi Alliance Authorized testing Lab in China. Wi-Fi testing work started from September 2005 and can provide interoperability test for 802.11a, 802.11b, 802.11g, 802.11h, 802.11d, WPA, WPA2, Extended EAP, WMM as well as WMM-APSD, etc. Moreover, the lab also can provide all RF performance test, certification test for FCC, CE and public WLAN test service for WLAN products

.

WiMAX equipment test : WiMAX certification test: The second WFDCL(WiMAX Forum Designated Certification Laboratory) in the world, WiMAX certification test lab is capable of doing the following certification tests for costumers:

•  PCT - Protocol Conformance Testing

•  RCT - Radio Conformance Testing

•  IOT – Interoperability Testing

Regulatory Testing

•  EN 301 753 - RF Testing for 3.5 GHz WiMAX devices.

•  EN 301 489-1&4 - EMC testing.

•  EN 60950 - Electrical safety testing.

•  EN 50385 - Human exposure to electromagnetic fields testing.

•  47 CFR Part 27 - RF Testing for 2.5 GHz WiMAX devices.

•  47 CFR Part 15.209, 15.247- RF Testing for 5.8 GHz WiMAX devices.

•  47 CFR Part 15 Subpart B - EMC Testing.

•  47 CFR Part 1.1307, 1.1310 - SAR Testing.

Information safety test: Information safety test for all kinds of network and terminal equipment, including: prevention of information leakage, interference positioning, TEMPEST …

Mobile terminal conformance test: GCF authorized lab. The lab is equipped with multiple sets of advanced test system for RF, USIM/SIM interface test and audio conformance test for GSM and WCDMA system. It can perform GCF/PTCRB conformance test and CE/FCC test for GSM and WCDMA mobile terminal.

Antenna performance:

Antenna performance test lab:

First independent third-party TRP and TIS test lab for mobile communication equipment in China;

First CTIA authorized OTA chamber performance calibration lab in China;

One of the first CTIA authorized testing lab-CATL in Asia;

One of the first authorized testing lab for TRP and TIS test of GPRS and EGPRS equipment in the world.

The Lab has the testing capabilities as following:

TRP and TIS test according to CTIA OTA Test Plan Revision 2.1;

The test system can perform TRP and TIS test for mobile phones in GSM850, GSM900, DCS1800, PCS1900, IS-95 CDMA, CDMA2000, GPRS, EGPRS and WCDMA system;

High-accuracy 2-dimensional RF radiation power and receiving sensitivity test ;

Passive antenna test for frequency lower than 18GHz;

High-frequency spurious test for wireless communication equipment – up to 40 GHz.