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Este documento fornece instruções para configurar e calibrar o software do r&s ims para realizar medições de imunidade conduzida de acordo com o padrão iec / en 61000-4-6. O documento aborda o processo de configuração do hardware, instalação do sistema operacional, calibração de transdutores alternativos, instalação de drivers usb e calibração de caminhos de sinal. Além disso, o documento fornece instruções para realizar a primeira medição ems e fornece informações sobre as configurações padrão para os padrões comerciais iec / en 61000-4-3 e -6.
Tipologia: Esquemas
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Products: R&S IMS, R&S NRP-Z
Application Note
This application note describes the software configuration, system calibration and test routine for EMC measurements according to the EMS standard IEC / EN 61000-4-
1 Contents...................................................................................................................................... 2 General Remark .......................................................................................................................... 3 Software Configuration and System Calibration.............................................................................. 3.1 General Topics ....................................................................................................................... 3.2 Installation of R&S IMS Operating System................................................................................ 3.3 Configuration of Hardware....................................................................................................... 3.4 Calibration of Signal Paths for Conducted Measurements ......................................................... 3.4.1 Calibration of Signal Paths for CDN with Internal Amplifier (R&S IMS v14) ......................... 3.4.2 Calibration for Alternative Hardware Setups ................................................................... 11 3.5 Reference Calibration Conducted .......................................................................................... 14 3.5.1 General Information ...................................................................................................... 14 3.5.2 Reference Calibration CDN ........................................................................................... 14 4 Measurement Example............................................................................................................... 17 4.1 Measurement Example ......................................................................................................... 17 4.2 Control Elements during EMS-Test ........................................................................................ 19
The aim of this application note is to describe the software configuration, system calibration and test routine for a typical measurement setup using a CDN (Coupling-Decoupling-Network) as transducer according to EN61000-4-6. The use of the alternative transducers EM-Clamp and BCI Clamp (Bulk Current Injection Clamp) are also described.
The application note consists of three main parts:
There are four application notes covering the commercial standards IEC / EN 61000-4-3 and -6:
Note: This application note is based on the hardware setup described in application note 1SP31.
Note: To carry out measurements according to the EMC standards requires detailed knowledge of these standards and EMC practice, which can not be covered by this application note.
Choose Install R&S IMS OS Software
Remark: It can also be started manually from the CD-ROM with HTMLView.exe
Note:
The installation of the Windows USB device drivers has to be carried out in two phases. The first phase is completed after installing the above listed drivers. The second installation phase starts, when the R&S IMS is connected and powered the first time (installation of meM-PIO and amplifier device).
Installation of USB-Drivers
The values are preconfigured for the internal power amplifier of the R&S IMS v14. In case of an external amplifier please adjust these data according to its specifications.
All RF paths should be calibrated in advance. This makes it easy to replace cables later. Then only the calibration for this new cable is necessary and not for the complete system with maybe different transducers.
The calibration of the signal paths consists of two steps:
Remark: All switching of the paths are automatically preconfigured in the software for these configurations. They need not to be changed.
Remark: If option R&S IMS-B3 is installed, the interlock contact must be closed for this measurements.
The following signal paths have to be calibrated:
For the first three signal paths in the table above the cables are delivered with the R&S IMS. These paths cannot be calibrated without opening the R&S IMS. The attenuation correction tables are therefore included in the CD-ROM as files. To import these tables proceed as follows:
The path Amplifier1-CDN is calibrated via measurement:
Cable Calibration CDN, step 3 (Measurement Menu)
CAL Adaptor- RFSensor
Power Sensor to X (RF OUT1)
between X1 (RF OUT1) and X10 (MON IN)
Power Sensor to X (FWD)
Tip: In case of fixed installation of the cabling the connection points may be too far away for direct connection of the power sensor. In this case you can use extension cables. The same cable has to be inserted during both measurements, normalisation and path calibration.
Follow the instructions of the measurement procedure in chapter 3.4.1.2.
Choose the corresponding path in the hardware setup menu and use the following connections for calibration:
Signal Path Setup Normalisation Setup Calibration Measurement Measurement Signal Path Power Sensor
Generator – Amplifier1 Power Sensor to X (RF OUT1)
between X1 (RF OUT1) and Power Sensor
Amplifier1- RFSensor1(FWD)
Power Sensor to X (RF OUT1)
between X1 (RF OUT1) and X4 (FWD1)
Power Sensor to X (FWD)
Amplifier1- RFSensor1(REV)
Power Sensor to X (RF OUT1)
between X1 (RF OUT1) and X5 (REV1)
Power Sensor to X (FWD)
Amplifier1-CDN Power Sensor to X (RF OUT1)
between X1 (RF OUT1) and Power Sensor
The same test setup and calibration as for CDN is used for EM-Clamp.
After calibration of CDN signal paths open the Hardware Setup for Injection Clamp (BCI).
Follow the instructions of the measurement procedure in chapter 3.4.1.2.
Choose the corresponding paths in the BCI hardware setup menu and use the following connections for calibration:
Signal Path Setup Normalisation Measurement
Setup Calibration Measurement
Amplifier1- InjectionClamp
Power Sensor to X (RF OUT1)
between X1 (RF OUT1) and Power Sensor
MonitoringClamp- RFSensor
Power Sensor to X (RF OUT1)
between X1 (RF OUT1) and Power Sensor
Set the following parameters:
Parameter Value Remark
Type of DUT Transducer
Signal Source Generator Right click on icon
Transducer Name Example: BCI Monitoring Clamp F-52 User defined
Signal detection RFSensor1 Right click on icon
Source Unit dBm Unit of signal detection
Destination Unit dBμA Unit of value to be monitored
(Injected current)
Sheet Options:
Add Constant 73 dB Conversion factor from dBm to dBμA
Sheet Frequency:
Start 150 kHz
Stop 80 MHz
Step Mode Log Default setting
Step Size 1 %
Remark: The test level is measured by the monitoring clamp as current value (dBμA). It is automatically converted into a voltage value based on a impedance of 150 ohms by the software. This procedure is defined in IEC/EN61000-4-6, subclause 7.4.
Press calibrate to start calibration.
The calibration itself is carried out in the same way as the cable calibration. The monitoring clamp is placed in its calibration fixture for calibration.
Most Susceptibility Measurements are performed using the substitution method (for example EN 61000-4). A calibration is run in the first step to determine which input power into the transducer is necessary to get the required stress level at the location of the EUT. The stress level is measured in this case with the power meter (reference measurement). The received measurement results are stored in the Reference Calibration File. During the real EUT measurement the sensor is then replaced by the EUT. Now a forward power with a level stored in the reference calibration file is fed into the transducer to generate the required stress level.
Reference Calibration Tables are generated with the Test Method "Reference Calibration" during an EMS measurement run.
Install all cables according to the measurement setup including 6 dB attenuator and CDN. The setup should be the same as for the EMS measurements later.
Connect the 150-50 Ohm adaptor to the CDN via a suitable adaptor. Connect the ground connections of the CDN and the 150-50 Ohm adaptor to the test table.
Calibration Setup CDN
When the test is finished for all frequencies the following dialog for storing the reference calibration file appears:
Tip: The name of the reference calibration file should always give a reference to the name of the antenna and the immunity level (example: EN61000-4-6 CDN M2-3 10V)
Now the system is ready for conducted measurements.
Note:
For each transducer (e.g. different CDNs, EM-Clamp) a separate reference calibration file must be created and used for the test.
The test is based on the test template, which was already used in the reference calibration. This test template contains all the basic information like type of test, frequency range, dwell time.
Note:
The predefined test templates contain the settings according to the standards.
Components of the Test Mode:
Test Component Explorer
Antenna Control
Turntable Control
Test Control Toolbar
Frequency Control
Scan Parameter Control
Measurement Graphic (Monitoring Channel)
Remark: Antenna and turntable control are not visible for conducted measurements
In the following the control elements and possibilities during a test are described in more detail:
Test Toolbar:
The following section gives a short introduction to the functionality of the symbols in the Test Toolbar.
Open Test or Create New Test Save Test
Close Test
Modify Test Template
Modify Test Method
Open Result Table
Modify Test Info
Activate Measurement Mode
What is the meaning of Measurement Mode?
A test can be loaded for two purposes: running a new measurement or doing additional analysis with the goal of making a report printout of the measurement results. For this, EMC32 distinguishes the Measurement Mode , used for running a measurement, and the Analysis Mode , where the elements for running a measurement are not shown. Switching between the two modes is done via the main menu entry Test → Meas. Mode, by pressing the F4 key or by clicking on the corresponding symbol in the Test Toolbar.
When a new Test is created no result data are available for analysis. Because of that the software immediately activates the measurement mode. Otherwise an existing test is loaded and the software switches into the Analysis Mode. Here the measurement mode must be activated explicitly to repeat or continue the measurement. In the Measurement Mode additional controls are added to the user interface of EMC32.
Note:
Most settings can be modified in de-activated Measurement Mode only. Because these new settings change the measurements, a new test is created afterwards.
Note: In the test folder a copy of the test template is stored. Therefore changes by the button Modify Test Template in the toolbar only modifies the template and settings for this test.
Test Component Explorer:
The following section gives a short explanation of the functionality of the Test Component Explorer.
Available Measure- ment Result Tables
Available Reports
Available Measure- ment Graphics
Available Test Setups (Templates)
Start Point of the data tree of all available files in a Test
Test Control Toolbar:
The following section gives a short introduction into the functionality of the Test Control Toolbar. It is used for the control of the measurement run and the switching of the measurement mode (automatic, single). During an automatic measurement only some of the symbols shown here are displayed.
