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Related Manuals for LANGER EMV-Technik ESA1
Summary of Contents for LANGER EMV-Technik ESA1
- Page 1 User Manual Development System - Disturbance Emission ESA1 Copyright Dipl.- Ing. Gunter Langer Nöthnitzer Hang 31 01728 Bannewitz 15.05.2002 Measuring disturbances emitted by a module – comparative measurements at the developer's workplace ESA1-User manual 1117 PZ.doc...
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Page 2: Table Of Contents
Measurement of the differential-mode component Safety instructions Warranty Technical parameters Near-field probes HFW 21 RF current transformer: HFA 21 RF bypass GP 23 ground plate Z23-1 shielding tent PA 203 preamplifier Scope of delivery Content of the ESA1 case - 2 -... -
Page 3: Measurement Procedure
1 Measurement procedure The ESA1 is suitable for carrying out comparative measurements of disturbances emitted by modules directly at the developer's workplace. Since the effect of any changes to the module becomes evident immediately, the time needed to optimize the unit under test can be dramatically reduced. -
Page 4: Description Of The Components
LANGER DE-01728 Bannewitz ESA1 mail@langer-emv.de EMV-Technik www.langer-emv.com 2 Description of the components 2.1 GP 23 ground plate The GP 23 metal ground plate is the reference plane for the measurement set-up. It contains the connectors to supplying the unit under test and preamplifier as well as the output of the latter. -
Page 5: Z23 Shielding Tent
ESA1 measurement set-up. The tent poles are folded upon delivery for ease of transport. Two rubber plugs snap into place in the two rear openings of the ground plate to secure the tent against displacement (Figure 4). - Page 6 LANGER DE-01728 Bannewitz ESA1 mail@langer-emv.de EMV-Technik www.langer-emv.com Then pull the BZ23-1 shielding material over the poles from the back. Flexible magnetic strips are attached to the edges of the shielding material. Press them against the edges of the ground plate to ensure a conductive connection.
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Page 7: Hfw 21 Rf Current Transformer
LANGER DE-01728 Bannewitz ESA1 mail@langer-emv.de EMV-Technik www.langer-emv.com 2.3 HFW 21 RF current transformer The RF current transformer (Fehler! Verweisquelle konnte nicht gefunden werden. and ) measures high-frequency currents of up to 1 GHz on lines and diverts these currents to the base plate. -
Page 8: Hfa 21 Rf Bypass
LANGER DE-01728 Bannewitz ESA1 mail@langer-emv.de EMV-Technik www.langer-emv.com 2.4 HFA 21 RF bypass The RF bypass (Figure 11) supplements the RF current transformer by providing another capacitive or conductive connection from the unit under test to the ground plate if necessary. -
Page 9: Near-Field Probes
Figure 14 PA 203 Preamplifier The preamplifier is operated inside the shielding tent during measurements with the ESA1 system (Figure 15). Filters are provided on the GP 23 ground plate for the preamplifier's output line and power supply. -
Page 10: Measurement Set-Up
2.7 Measurement set-up Figure 15 Measurement set-up ESA1 (schematic) First place the GP 23 ground plate with its socket connectors pointing to the left (under normal conditions) and set up the shielding tent (description in section 2.2). -
Page 11: Practical Procedure
3 Practical procedure 3.1 Measuring with ESA1 The measurements carried out with the ESA1 are relative measurements. Thus it is important to define a measurement set-up and document the initial state first. Measuring results from previous measurements under standard conditions provide crucial information on critical frequency ranges and the extent of necessary improvements. - Page 12 LANGER DE-01728 Bannewitz ESA1 mail@langer-emv.de EMV-Technik www.langer-emv.com 1) Easy and flexible portrayal of the measured data All measured data can be displayed in both a 2D and 3D diagram. Figure 16 2D diagram Figure 17 3D diagram It does not matter if the measured data was recorded in different frequency ranges. Individual measurement curves can be displayed or hidden and each curve can be assigned a certain color or description to provide a better overview.
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Page 13: Localization Through Global Changes To The Unit Under Test
LANGER DE-01728 Bannewitz ESA1 mail@langer-emv.de EMV-Technik www.langer-emv.com 3) Fast and easy handling of spectrum analyzers / frequency generators All the important device settings can conveniently be carried out with the ChipScan-ESA software and all supported spectrum analyzers can be controlled via a uniform operator interface. -
Page 14: Reason Analysis With Near Field Probes
LANGER DE-01728 Bannewitz ESA1 mail@langer-emv.de EMV-Technik www.langer-emv.com 3.4 Reason analysis with near field probes Carry out near-field measurements to exactly determine the RF sources that emit disturbances. The goal is to correlate the currents measured with the RF current transformer to the RF fields on the module. -
Page 15: Modification Of The Module
LANGER DE-01728 Bannewitz ESA1 mail@langer-emv.de EMV-Technik www.langer-emv.com 3.5 Modification of the module There are various starting points for modifying a module: a) Modifying the module's geometry with regard to - plug-and-socket connectors and cable connections - the layout - the surrounding metal system... -
Page 16: Measurement Set-Up Variants
LANGER DE-01728 Bannewitz ESA1 mail@langer-emv.de EMV-Technik www.langer-emv.com 4 Measurement set-up variants 4.1 Measurement of the common-mode component 4.1.1 Unit under test with one cable terminal If only one cable, e.g. the power supply cable, is connected to the unit under test, its leads are filtered first through the GP 23 ground plate and then through the HFW 21 (Input: Power and output COM). -
Page 17: Unit Under Test With Several Cable Terminals
LANGER DE-01728 Bannewitz ESA1 mail@langer-emv.de EMV-Technik www.langer-emv.com 4.1.2 Unit under test with several cable terminals The aim is a measurement set-up which is as simple and easily comprehensible as possible. All cables that are not crucial for operating the unit under test are thus disconnected. A restricted... -
Page 18: Example: Measurements On A Complex Unit Under Test
LANGER DE-01728 Bannewitz ESA1 mail@langer-emv.de EMV-Technik www.langer-emv.com 4.1.4 Example: Measurements on a complex unit under test In many cases, different effects of various RF sources within the unit under test will first be superposed and lead to an amplification or reduction of the RF fields at particular frequencies. It is... - Page 19 LANGER DE-01728 Bannewitz ESA1 mail@langer-emv.de EMV-Technik www.langer-emv.com Measurement: Now briefly connect a COM output of the HFW 21 with the GND of the interface module (Figure 28). The voltage difference generated in the area of the plug-and-socket connector causes a compensating current to flow through HFW 21 and its capacitive connection to the ground plate back to the GND of the basic unit.
- Page 20 LANGER DE-01728 Bannewitz ESA1 mail@langer-emv.de EMV-Technik www.langer-emv.com Figure 29 Evaluation of the modifications with the HFW 21 Tap the voltage directly at the GND terminal of the interface plug via a short measuring cable to the COM port of the HFW 21. Thus the modifications that have been made directly on the interface module can be evaluated.
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Page 21: External Data Lines
LANGER DE-01728 Bannewitz ESA1 mail@langer-emv.de EMV-Technik www.langer-emv.com This set-up has a disadvantage: the voltage differences remaining from the areas of the basic unit, plug-and-socket connector and GND of the interface module are measured as well. Wherever functionally possible, you should initially operate the interface module separately without the basic unit (Figure 31). -
Page 22: Measurement Of The Differential-Mode Component
LANGER DE-01728 Bannewitz ESA1 mail@langer-emv.de EMV-Technik www.langer-emv.com 2) Measuring the effect on the unit under test Simultaneous measuring of the RF current on many lines, such as those of a ribbon cable, is not possible. In such cases you have to carry out the measurement according to Figure 33: Do not measure the RF current directly on the signal lines but on another cable (e.g. -
Page 23: Safety Instructions
Observe the operating and safety instructions for all devices used in the set-up. Never use any damaged or defective devices. Carry out a visual check before using a measurement set-up with a Langer EMV-Technik GmbH product. Replace any damaged connecting cables before starting the product. -
Page 24: Warranty
EMV-Technik www.langer-emv.com 6 Warranty Langer EMV-Technik GmbH will remedy any fault due to defective material or defective manufacture, either by repair or by delivery of replacement, during the statutory warranty period. This warranty is only granted on condition that: ... -
Page 25: Technical Parameters
LANGER DE-01728 Bannewitz ESA1 mail@langer-emv.de EMV-Technik www.langer-emv.com 7 Technical parameters 7.1 Near-field probes Characteristic Description Type RF-R 3-2 The near-field probe is designed to achieve nearly punctiform detection of HF magnetic fields. The size of the probe enables the resolution of magnetic field distribution within millimetres. - Page 26 LANGER DE-01728 Bannewitz ESA1 mail@langer-emv.de EMV-Technik www.langer-emv.com RF-U 5-2 The near-field probe is designed for detecting surface and circular magnetic fields on very wide conducting paths, metallized surfaces, plug-and-socket connectors, electronic components, cables and component connections. The sources of RF magnetic fields can be detected and conclusions regarding internal interference currents achieved.
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Page 27: Hfw 21 Rf Current Transformer
LANGER DE-01728 Bannewitz ESA1 mail@langer-emv.de EMV-Technik www.langer-emv.com RF-E 05 this probe you are able to register With selectively electrical fields layouts component area of flat units. The breadth of the field electrode is about 1 mm. Therefore you can locate electrical fields very accurately. These electrical fields are caused by clocked lines, IC pins and small components. -
Page 28: Hfa 21 Rf Bypass
LANGER DE-01728 Bannewitz ESA1 mail@langer-emv.de EMV-Technik www.langer-emv.com 7.3 HFA 21 RF bypass Capacitances 10 pF to 100 nF Max. operating voltage 50 V 7.4 GP 23 ground plate Working area (900 x 500) mm Max. continuous current Damping 50 dB at 1 MHz – 1 GHz... -
Page 29: Scope Of Delivery
LANGER DE-01728 Bannewitz ESA1 mail@langer-emv.de EMV-Technik www.langer-emv.com 8 Scope of delivery Item Designation Type Parameter Quantity RF current transformer HFW 21 RF bypass HFA 21 ------------------------------------------------------------------------------------------------------------------- Tent poles* ZG 23-1 Shielding material* BZ 23-1 Ground plate GP 23 ------------------------------------------------------------------------------------------------------------------- 30 MHz – 3 GHz H-Field Probe mini RF-B 0.3-3... - Page 30 ------------------------------------------------------------------------------------------------------------------- User manual Laminated quick guide ESA1 system case * The shielding tent is alternatively available with a taller working space ((900 x 500 x 650) mm). The use is analogous to the above description. Figure 37 Taller working space with ZG 23-2 and BZ 23-2 installed on GP 23 ground plate...
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Page 31: Content Of The Esa1 Case
This document may not be copied, reproduced or electronically 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 arise from using this printed information.