In terms of testing instruments, the automatic testing system with spectrum analyzer as the core can quickly and accurately provide EMC-related parameters. The new EMC scanner combined with spectrum analyzer realizes the visualization of electromagnetic radiation. Individual components of the system, PCB boards, the whole machine and cables, etc. can be tested in a full range of three-dimensional, showing the real electromagnetic radiation conditions.
EMC testing must be performed in accordance with the test methods given in the EMC standards and specifications, and the limit values specified in the standards are used as a criterion. For pre-compatibility testing, although it is not possible to guarantee that the product passes all the items of the standard test, but at least it can eliminate the vast majority of electromagnetic interference, thus improving the credibility of the product. And it can point out how you can improve your design and suppress EMI emissions.
Electromagnetic compatibility test standards are: civilian gb17626 series; military GJB151A/GJB152A.
Civilian test items are electrical fast transient pulse group immunity test, surge (shock) immunity test, voltage dips, short-term interruptions and voltage changes in the immunity test, electrostatic discharge immunity test, RF electromagnetic field radiation immunity test, transmitted voltage and radiated field immunity test. test, transmitted voltage and radiated field strength. There are military tests such as CE101, CE102, CS106, CS114, CS116, RE102 and so on. And each industry has each industry's electromagnetic compatibility standards, different standard test items are not the same, of course, the test requirements and test layout and so on are not the same. Although the test items of military and civilian products are different, the test principle is basically the same. It includes electromagnetic interference and electromagnetic sensitivity of the two parts, electromagnetic interference test is to measure the equipment under test in the normal operating conditions and the size of the electromagnetic wave signals emitted to the outside to react to the surrounding electronic equipment interference strength. Electromagnetic sensitivity test is to measure the equipment under test on the electromagnetic harassment of the anti-interference ability. Electromagnetic interference mainly includes radiation emission and conduction emission.
Because of the preparation for the establishment of electromagnetic compatibility test laboratory requires a huge investment, at present the domestic large-scale electromagnetic compatibility test laboratory are: China Aerospace Science and Industry Corporation Second Research Institute 203 Suzhou Electric Apparatus Research Institute Suzhou Electric Apparatus Scientific Research Institute Co. / civil qualifications are available), China Shipbuilding Industry EMC Testing Center (military / civil qualifications are available); EMC test laboratories in the automotive industry is mainly Changchun FAW EMC Test Center.