Helmut Singer Elektronik
Contents
1. Helmut singer Elektronik T 557 0052 1 3 22 TEL 06 6656 4747 www helmut singer de info helmut singer de fon 49 241 155 315 fax 49 241 152 066 Feldchen 16 24 D 52070 Aachen Germany A OUTLINE The ENS 30XA is a noise simulator which can generate high voltage rectangular wave impulses The maximum output voltage is 3kV for rectangular waves these output waves can be superposed on an AC or DC power line and applied to the EUT 5 1 2 3 4 5 6 7 8 9 SPECIFICATIONS Output pulse voltage 3000 V max when terminated with 50 Q Output pulse width 50 ns to 1 s variable in 50 ns steps when the PULSE OUT connector 1S terminated with 50 Q Pulse rise time at LINE OUT connector 1 ms 10 Pulse repetition frequency selector position in parentheses Manual trigger By push button MAN EXT External trigger By TTL level signal 60 Hz max MAN EXT Automatic trigger 20 to 60 Hz 10 variable VARI AC power synchronization 50 60 Hz LINE Output pulse polarity Positive or Negative manual selection Pulse injection phase angle 0 to 360 continuously variable for AC power supply 50 60 Hz Rated power capacity of EUT 240 VAC max and 20 A max single phase 65 VDC max and 20 A max Power Single phase 230 VAC 10 50 60 Hz and approx 500 VA Environmetal Requirements Operating Temperature2. EXT Trig 1Hz 60Hz MAX TTL VARIL Trig 20 60Hz 50Hz 60Hz 0 360 430 x 300 x 500 W x H x Dmm 430 x 300 x 500 W x H x Dmm 25kg 30kg aC Ri 500 EMC 557 0052 1 3 22 TEL 06 6656 4747 NAKANO EMC ENS 40 MANU Trig EXT Trig 1Hz 60Hz MAX _TTL VARI Trig 20 60Hz LINE 50Hz MIX 60Hz 0 lt 360 AC240V MAX DC65V MAX 20A MAX 3 30A MAX Ar eR AC100V 50Hz 60Hz 500VA 630 X 300 x 500 W X H X Dmm 630 x 300 x 500 W x H X Dmm 35kg 40kg a m c i yg Be AT on 500 With compliments EMC
3. NAKANO EMC ENS 24 FRG Sone 1000n Sone APY IISA T 200V MAX 400V 4000V MAX 1ns 1096 30ns 2096 MANU Trig EXT Trig 1Hz 100Hz MAX TTL pt HOOHZ MAXTILLDAIL tsti COSOSCSC d VARI Trig 30 100Hz 50Hz 60Hz 0 360 430 x 250 x 400 W x H x Dmm 430 x 250 x 400 W x H X Dmm 20kg 25kg 500 EMC 557 0052 1 3 22 TEL 06 6656 4747 With compliments Helmut Singer Elektronik www helmut singer de info helmut singer de fon 49 241 155 315 fax 49 241 152 066 Feldchen 16 24 D 52070 Aachen Germany NAKANO EMC ENS 30 3000V MAX 50 FRB a 1096 MANU Trig
4. Transmission mode normal or common mode with direct coupling and radiation mode in 4 is related to the EUT s noise protection This is an important parameter when evaluating whether the protection is effective _ For example let us consider noise filters used in electronic equipment In some circuit configurations noise filters remove normal mode noise well but not common mode noise Noise filters are often effective against noise on power lines but not at all effective against radiation noise For satisfactory noise prevention measures must be taken against noise of each mode Current noise simulators are not efficient enough to effectively simulate radiation noise Such noise can only be generated by applying output pulses from a noise simulator to a copper Joop antenna about 30 to 50 cm in diameter This helps with checking the influence of radiation noise However this method is not yet fully understood l Sanki optionally supplies a type 25 loop antenna 25 mm in diameter for local noise radiation tests in extremely small areas The antenna is sold with a field strength calibration sheet and is suitable for practical use a
5. 5 to 40 C Storage Temperature 10 to 50 C Relative Humidity no more than 80 without dew 6 SE Ts ES Vere ete x a i Pe H A m Ht ees A att ay Se Kad 3 Be me sb amp 1 WHAT IS A NOISE SIMULATOR A noise simulator is an electrical noise simulator or high frequency transient noise simulator This simulator is used to test a piece of equipment under simulated working conditions it is not a measuring unit A test using a simulator should give accurate results So certain electrical standards must be imposed to keep conditions the same for each piece of equipment under test EUT and for each time a test is done The conditions when noise is applied greatly affect the results of a test using a simulator Major simulated noise parameters are as follows 1 Voltage with a specified output impedance usually 50 O 2 Pulse rise time usually 1 ns 3 Pulse width 4 Transmission mode normal or common mode with direct coupling and radiation mode These parameters are interdependent Voltage in 1 ts the most important parameter However the effect of the voltage depends on output impedance Noise resistance must be indicated as a noise voltage at a certain output impedance For example EUT 1 and EUT 2 may both withstand 500 V noise produced by noise l simulators If the noise simulator for BUT 1 has an output impedance of 300 Q
6. and that for EUT 2 has an output impedance of 50 Q however the EUTs may not have the same noise resistance EUT 3 may withstand a 500 V noise produced by a noise simulator of unknown impedance However this does not necessarily mean the equipment can withstand 500 V noise produced by any noise simulator irrespective of output impedance Pulse rise time in 2 has two physical meanings One the greater the di dt or dv dt value the faster the rise time Two the faster the rise time the further the upper limit of the impulse frequencies extends di dt is closely related to Voltage in 1 For example the inductance induced voltage is directly proportional to the di dt value Ideally the impulse frequency range should cover all the frequencies of noise BUT receives in its working environment This simulator with a very wide frequency band can vary an output pulse width from 50 ns to 1 ws in units of 50 ns Pulse width in 3 is mainly related to the energy level of noise and also has some effect on frequency components Since the pulse width Increases with energy level it has some correlation with voltage and rise time Experiments on digital equipment however did not reveal simple linear relationships between pulse width voltage and rise time The relationship depended on the equipment characteristics Some equi pment showed a tendency for correlation at smaller pulse widths Other equipment showed the opposite tendency
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