EMC的资料
U盘、MP3 Player、MP4 Player EMC测试项目该产品应满足的欧洲指令：89/336/EEC Electromagnetic Directive
参考标准有：
EN 55022: Limits and methods of measurement of radio disturbance characteristics of information technology equipment
EN 55024 Information technology equipment - Immunity characteristics - Limits and methods of measurement
产品按照标准测试具体项目如下：
一、 EMI干扰部分测试项目
参照标准 EN55022：1998+A1:2000+A2:2003
1. Terminal voltage:150KHz~30MHz
FrequencyRange (MHz) Limits ( dBuV)
Quasi-Peak Average
0.150～0.500 66～56 56~46
0.500～5.000 56 46
5.000～30.00 60 50
2. Limit of Radiated Disturbances : 30MHz~1000MHz
Frequency(MHz) Distance(Meters) Field Strengths Limits(dBV/m)
30 ~ 230 3 40
230 ~ 1000 3 47
二、 EMS抗干扰部分测试项目
参照标准EN55024:1998+A1:2001+A2:2003
1. Electrostatic discharge:EN61000-4-2
Air discharge:8kv
Contact discharge:4kv
Performance criterion :B
2. Radiated Susceptibility：IEC 61000-4-3
Frequency range:80MHz~1000MHz; 3v/m;1KHz AM 80%
Performance criterion :A
3. Electrical fast transients: EN61000-4-4
AC power ports:1KV; 5KHz
Performance criterion: B
4. Surge: EN61000-4-5
AC power ports:
0 90 180 270
Phase to phase ±1kv ±1kv ±1kv ±1kv
Phase to earth ±2kv ±2kv ±2kv ±2kv
Performance criterion :B
5. Injected currents: EN61000-4-6
AC power ports:150KHz~80MHz;3V;1KHz AM 80%
Performance criterion :A
6. Voltage dips and interruptions: EN61000-4-11
Level U2 td Phase Angle N Pass
1 100% 10ms 0/90/180/270 3 C
2 30% 1000ms 0/90/180/270 3 C
3 60% 200ms 0/90/180/270 3 C
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