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ESA1-User manual 1117 PZ.doc

User Manual

Development System - Disturbance Emission

ESA1

Measuring disturbances emitted by a module

–

comparative measurements at the developer's workplace

Dipl.- Ing. Gunter Langer

Nöthnitzer Hang 31

01728 Bannewitz

15.05.2002

Summary of Contents for ESA1

Page 1: ...r Manual Development System Disturbance Emission ESA1 Measuring disturbances emitted by a module comparative measurements at the developer s workplace Copyright C Dipl Ing Gunter Langer N thnitzer Han...

Page 2: ...ar field probes 14 3 5 Modification of the module 15 4 Measurement set up variants 16 4 1 Measurement of the common mode component 16 4 1 1 Unit under test with one cable terminal 16 4 1 2 Unit under...

Page 3: ...stem of the unit under test is excited through electric or magnetic coupling i e in the near field This metal system comprises the PCB itself and all connected cables and metal parts such as housings...

Page 4: ...well as the output of the latter Figure 2 Figure 2 GP 23 Ground Plate The nickel plated surface ensures a steady and reliable conductive connection to the HFW 21 RF current transformer or HFA 21 RF by...

Page 5: ...the immediate vicinity of the unit under test is possible because all cables to the unit under test are disconnected coupled to the base plate through capacitive coupling or filtered in a typical ESA1...

Page 6: ...ft and right side of the shielding material against the ground plate An uninterrupted connection between the ground plate and shielding material is crucial for an effective shielding Figure 6 Z23 1 sh...

Page 7: ...e currents flowing on both lines whereas the differential mode currents are measured via the DIFF output The RF output voltage is independent of the direct current flowing through the transformer if c...

Page 8: ...s It is mainly used to simulate the data lines connected in normal operation and their capacitance relative to the surroundings Instead of the data line a discrete capacitance is connected to the sign...

Page 9: ...d measured by the probe and typical examples for application Optionally available The near field probes of the LF type are available for measurements in the frequency range between 100 kHz and 50 MHz...

Page 10: ...of the ground plate Inside the shielding tent connect the 12 V input of the PA 203 to the 3 5 mm connector on the ground plate via the enclosed power supply cable approx 10 cm long two power supply p...

Page 11: ...ly emitted This information allows you to design a measurement set up so that the decisive emitted currents can be measured To confirm the measurement set up compare your measurement results with the...

Page 12: ...re gridlines allow the developer to compare measurement curves very precisely in the linear or logarithmic 2D diagram Figure 18 Data Manager 2 Storage and export of measured data Any amount of measure...

Page 13: ...evices can also be stored in configuration files and reloaded 3 3 Localization through global changes to the unit under test The unit under test often allows you to locate the emission sources by chan...

Page 14: ...0 1 for magnetic and the probe RF E 02 for electric fields These measurements give you an idea of the respective disturbance emission mechanism As a next step locate the sources of these exciting fiel...

Page 15: ...ed damping or the lines of force are kept in the immediate vicinity of the source and do not exit the module Having detected the potential disturbing fields on the module you will automatically have i...

Page 16: ...r test is installed near a metal surface control system in a washing machine simulate this distance The scope of delivery includes a foam block 25 mm high which you can use as a distance piece Figure...

Page 17: ...nk to the ground plate Establish a direct conductive connection from the GND terminal of the plug and socket connector to the ground plate instead of the cable in the simplest case Figure 24 You can a...

Page 18: ...nd those of the basic unit 1 Plug and socket connector between basic unit and interface module Assumption The basic unit and interface module are connected to each other via data and control lines The...

Page 19: ...ifications such as filters or changing the plug assignment are directly measurable Figure 28 GND of the interface module connected to the COM output of the HFW 21 2 Electronic components processor wit...

Page 20: ...module feeds a RF current into the signal wires of the data cable This current couples to the shield via the cable capacitance of signal wire shield and flows back to the GND of the interface module I...

Page 21: ...upply systems Figure 31 Set up without the basic unit 4 1 5 External data lines 1 Measuring the RF current on data lines To measure the RF current on data lines simulate the capacitance of the line co...

Page 22: ...ts via the DIFF port Figure 34 According to the disturbance emission mechanism described under chapter 1 this differential mode current does not result in any disturbance emissions But since it also f...

Page 23: ...th field sources The user is responsible for taking measures to protect the correct function of products outside the EMC environment of the test set up in particular against interference This can be a...

Page 24: ...manufacture either by repair or by delivery of replacement during the statutory warranty period This warranty is only granted on condition that the information and instructions in the user manual have...

Page 25: ...The probe head contains a magnetically active curb with a width of approx 0 5 mm To achieve measurement the probe with the curb is positioned on conducting paths IC or capacitor connections Frequency...

Page 26: ...rface in question Due to its very small construction magnetic field distributions of under 1 millimeter can be resolved on IC housings and PCB surfaces for example The probe enables measurements in ha...

Page 27: ...C pins and small components Frequency 30 MHz to 3 GHz RF E 10 The near field probe detects electrical fields that clocked leads emit via their surface The probe head tip is approx 0 5 mm wide The inte...

Page 28: ...z 1 GHz DC socket 12 V 2 5 A 40 dB at 1 MHz 1 GHz Pole terminal 10 A 50 dB at 1 MHz 1 GHz 7 5 Z23 1 shielding tent Working room length x width x height Damping Z23 1 900 x 500 x 400 mm 45 50 dB at 30...

Page 29: ...3 GHz 1 11 H Field Probe RF R 400 1 30 MHz 3 GHz 1 12 H Field Probe RF U 2 5 2 30 MHz 3 GHz 1 13 H Field Probe RF U 5 2 30 MHz 3 GHz 1 14 E Field Probe RF E 02 30 MHz 1 5 GHz 1 15 E Field Probe RF E 0...

Page 30: ...Probe tip 1 33 ChipScan ESA software CS ESA 1 34 Dongle 1 35 User manual 1 36 Laminated quick guide 1 37 ESA1 system case 1 The shielding tent is alternatively available with a taller working space 90...

Page 31: ...nically processed either in its entirety or in part without the prior written permission of Langer EMV Technik GmbH The management of Langer EMV Technik GmbH assumes no liability for damage that may a...

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