Estimate EMS characteristics of electronic system

According to describing EMS characteristics of subsystems and components in a complicated Electronic system, this paper put forward a behavioral simulation method to establish EMS characteristics behavioral model of the whole system, then the EMS problems can be analysed and predicted easily. This method discriminates the characteristics of radiation sensitivity/ radiation path from conduction sensitivity/ conduction path. The analysis adopts the antenna feature of the cable and field-cable coupling characteristics. The criterion of the intersystem interference is whether the sensitive system can work normally. So the course to work out EMS characteristics of the whole system can be simplified. The paper puts an abundant practical test data in sensitive analysis, and avoids the larger error problems which come from the numerical equivalent calculation.