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Z-score based evaluation of proficiency testing for general tests is standardized in ISO 13528. Therefore, proficiency testing for EMI measurements is also evaluated with Z-score. Since Z-score is supposed to be calculated on the assumption that the distribution is normal distribution in the linear value, accordingly, the decibel values reported as EMI measurement readings shall be converted once...
VCCI had started Kit Module Program in 2005 in order to control EMI of the modules. In this program, the electric current on the power line (PL) of the power distribution network (PDN) on the printed circuit board (PCB) is measured by the magnetic probe (MP) method which has been standardized by IEC for the EMI testing of LSI. In this paper, the test result of several kinds of module is presented...
In non-standard test sites, background noise makes great influence to electromagnetic interference (EMI) measurements as a result of submergence of Equipment Under Test (EUT)'s own emission in the background noise. Accurate emission from a EUT is difficult to be obtained directly from measurement results. Focusing on this situation, this paper presents a method which eliminates background noise in...
This document analyses the field evenness of the 150 mm Strip-Line Cell. Based on the international standards ISO11452-5 and CISPR-25, we selected suitable line lengths function as the equipments under test, compared the measurement results between CISPR-25 antenna method and the ISO 11452-5 strip-line method, then proposed the best usable frequency band for the Strip-Line automobile electronics EMI...
Because of the easy operation and low cost, using GTEM cell in EMI test is very popular these years. The past research on GTEM cell was mainly on EMC test, the main theory of the GTEM cell testing is based on the total radiated power (TRP) calculation. In this paper, the method of using GTEM cell TRP test is introduced, and a serious of experiments are done to prove the practicability of this method...
The WG2 of CISPR/SC-I is discussing a reference test method for measurement of conducted disturbance voltage at mains port. A statistical approach seems to provide reasonable evaluation results to determine that multiple test methods are alternative methods. In the study reported here, we obtained data from measurements of the conducted disturbance voltage at mains port, taken with two different test...
Recently, the electromagnetic interference (EMI) limits and test methods for the National Aeronautics and Space Administration (NASA) Space Shuttle Program (SSP) were revised to incorporate portions of MIL-STD-461E. Use of commercial off the shelf (COTS) equipment is becoming the preferred solution for equipment integration whenever practicable. NASA Johnson Space Center (JSC) electromagnetic compatibility...
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