EMC-PARTNER EXTTRA3000 E, User Manual

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E-TRA3000 F-S-D-V-C_E-Manual 143/162
13 Appendix and Corrections
13.1 Appendix
13.1.1 Definition of the EFT Waveform
300ms 15ms
b) Burst Prüfsequenz
t
U U
0,5
0,1
0,9
50ns+-30%
5ns+-30%
t
a) Spannungsform gemessen an 50 Ohm
Burst
Abhängig von der Prüfspannung
IEC 61000-4-4-Ed.2 specifies a verification of the waveform at 1000 Ohm
Burst-
Generator
50 Ohm Abschluss
50 Ohm Kabel
mit Teiler
UL
Memory oscilloscope
50 Ohm input
Checking the EFT tester. Checking procedure
1. The 50 Ohms terminating resistor, including the voltage divider, must be examined with a sinusoidal
voltage (CW) between 100 kHz and 200 MHz
2. The rise time must be between 3.5 and 6.5 ns.
3. The time to half value must be between 35 and 65 ns.
4. The source impedance of the tester is 50 Ohm, providing the coefficient of UL/Uout =2.
UL
= charging voltage
Uout = output voltage into 50 Ohm
depends on spike frequency
Waveform measured at 50 Ohm Burst test sequence
50 Ohm termination
50 Ohm cable