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Posted on 30 April 2019

EMV 2013: Where Experts Meets Experts

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For more than 20 years now the trade show EMV 2013 for electromagnetic compatibility with its conference and half-day workshops has been organized by Mesago. This year’s event took place from March 5th to 7th in Stuttgart, Germany. The main topic of the show and conference was e-mobility. Here, professionals had the opportunity to acquire information on trends and developments first-hand.

By Marisa Robles Consée, Corresponding Editor; Bodo’s Power Systems

In times of accelerating technical innovation, the challenges in the EMC area are continuously increasing. E-mobility and other new developments place high demands on EMC and safety. Unusually high voltages and currents, increasing shielding requirements and new charging technologies for electric vehicles make discussions and the exchange of ideas and solutions important for the entire industry. The rapid development in the electronics industry is expected to continue, so it is necessary to guarantee reliable functioning of all the highly complex systems.

EMV visitors

Successful exhibition and workshops

EMV 2013 offered the opportunity to gain hands-on experience in this area. A special action zone on e-mobility showcased electric cars and other exhibits. Impulse speeches informed the visitors and workshop participants about the latest development in this field. Another opportunity to gather information was the exhibitor forum. Parallel to the exhibition, EMV 2013 offered numerous user-oriented half-day workshops. Topics ranged from EMC basics to legal aspects and niche topics. For the participants these workshops provided a decent opportunity to keep up with the current state of technology. The speakers had the chance to share their knowledge and experiences with their colleagues.

Electromagnetic compatibility continues to gain in importance as the ongoing development of electronic systems poses more and more questions about electromagnetic behaviour. Adhering to EMC guidelines ensures the necessary safety and reliability of electronic systems that play an increasing role in our everyday lives. A total of 113 suppliers of EMC equipment, components and services once again seized this opportunity to show their solutions to trade visitors from the EMC sector. 49 exhibitors came from abroad from 16 different countries – mainly from United States, United Kingdom and France. This gave the trade show an international touch. The exhibition area was about 3600 m².

EMV exhibitors

More than 2,600 visitors gathered information from exhibitors about the latest developments and trends in the field of electromagnetic compatibility. The 39 accompanying workshops with about 1000 bookings also proved to be rather successful. Their leitmotif, electromobility, also governed the exhibition. The e-Mobility space, organized by EMC Test NRW, was a strong crowd puller, offering exhibits and spontaneous expert lectures. With its extensive solution proposals and trendsetting topics in electromagnetic compatibility, the EMV show once again turned out a central meeting point for the EMC sector.

Product Highlights

EM Test presented its NetWave, a three-phase programmable AC/DC power source. With its wide frequency bandwidth, the NetWave series offers waveform generation capabilities suitable for different test requirements such as IEC/EN 61000-4-13/-14/-17/-28 and -29 as well as for avionics testing according to DO-160, MIL-STD-704 and Airbus. Due to its high output power with very low harmonics distortion and the high stability of output voltage and frequency even with dynamically changing loads the NetWave seems to be well suited for compliant harmonics and flicker measurements as per IEC/EN 62019-3-2/-3/-11/-12 and JIS C 62019-3-2. Optionally the NetWave 3-phase series can be equipped with a power-recovery module to absorb feed-back power (AC/DC) up to the nominal power of the Net- Wave. Based on a Dual-Processor technology, with an integrated high-performance PC, a digital signal processor (DSP) and equipped with a hard disk the NetWave Series is capable to generate and record waveforms in real-time. The output voltage of the NetWave series has a distortion (THD) of less than 0.1% regardless of the load. Interfaces like GPIB and Ethernet are common features.

Aaronia exhibited its handheld spectrum analyzer Spectran V4. The analyzers have a rather compact design and a high sensitivity up to 170 dBm (1 Hz). They detect sources of interference, find out more about their causes, determine the frequency and intensity of the signal sources, and measure limits by using the company's high-end PC software. All Spectrans are developed, manufactured and calibrated in Germany at the Aaronia plant. That’s one of the reasons the company gives a full warranty of 10 years for all Spectran spectrum analyzers and EMC antennas. The spectrum analyzer software "MCS" for PC, MAC or Linux shows the real potential of the devices. The software can be used in addition to the Spectrum Analyzer. The connection works in real time, i.e. there is no discernible time difference between signal analysis and representation on the screen.

Rohde & Schwarz speeds up

The ESRP EMI test receiver from Rohde & Schwarz is the ideal instrument for developers to employ in the early stages of design to detect and eliminate EMC problems in components and instruments. The measurement company designed the new ESRP for diagnostic and pre-compliance measurements in the frequency range from 10 Hz to 7 GHz. The device is not only a fast EMI test receiver with standard-compliant bandwidths and detectors but a full-featured spectrum analyzer as well. It offers two methods for measuring disturbance signals: the fast, FFT-based time domain scan and the traditional – but slower – stepped frequency scan. Both methods comply with the CISPR 16-1-1 standard for EMC measurements. In the time domain scan mode, the R&S ESRP measures conducted disturbances in the CISPR band B with quasi-peak weighting faster, by many orders of magnitude, than conventional EMI test receivers using the traditional method.

ESRP EMI test receiver from Rohde & Schwarz speeds up precompliance measurements

Also, it allows manufacturers of modules, boards, instruments and systems to detect and eliminate EMC problems early in development. The receiver measures conducted and radiated electromagnetic interference (EMI). The preselection option protects the front end against overloading and delivers reproducible measurement results. As a result, the element of unpleasant surprise is taken out of certification in EMC test labs to some extent . The fast time domain scan mode has the potential to significantly reduce measurement times. This makes the measurement system suitable for testing DUTs with function-specific short operating times in the automotive and lighting industries, such as starters and window lifters or fluorescent lamps in the warm-up phase. In addition, the device is a full-featured spectrum analyzer that offers many other useful functions that allow users to better identify disturbances. The spectrogram function displays and records the spectrum versus time. The field-tested IF analysis function displays the spectrum around disturbance signals.

The ESRP is operated by touchscreen and has clearly structured measurement modes. Users can switch between modes by simply pressing a button and easily configure complex measurements and automated test sequences right from the touchscreen. It can remotely control simple automatic tests with the help of the ES-SCAN EMI software which records, evaluates and documents the data. The EMC32 application software for automated test routines, including report generation, can be used to integrate the receiver into largescale EMC systems with additional components such as mast, turntable and absorbing clamp/slideway systems, and for the remote control of these components. The ESRP can even be operated in environments without any AC supply because it also runs on DC power, making it suitable for mobile use in vehicles or battery operation during open area testing.

First ETSI standard compliant solution

Addtionally, Rohde & Schwarz presented with the TS8997 test system its first ETSI standard compliant solution for certification testing in the 2.4 GHz band. More and more devices are using wideband interfaces that operate in the 2.4 GHz band. Diverse radio services such as WLAN and Bluetooth as well as radio remote controls and wireless devices today share the 2.4 GHz band, which is unlicensed and being more and more widely utilized. Since radio channels interfere with each other , the ETSI EN 300 328 standard has been revised. Existing scenarios have been modified, and special tests for verifying improved coexistence behaviour have been introduced. On December 31, 2019, the standard will become mandatory for all devices using this frequency band and being sold in the European Union.

The TS8997 test system is the first solution on the market that can perform certification tests in line with the new ETSI EN 300 328 V1.8.1 standard for wireless devices in the 2.4 GHz band, says Jürgen Kausche, Product Management Aerospace & Defence Systems and Products Test and Measurement Division of Rohde & Schwarz. “During development and certification, device manufacturers and test houses can now verify whether new products meet the upcoming certification requirements”, he states. Version V1.8.1 of the ETSI standard specifies a special type of power measurement. Thanks to the test system’s four antenna ports and integrated OSP switching module, the TS8997 can perform this measurement fully time-synchronized and in compliance with the standard on up to four channels, allowing it to characterize devices with MIMO and beamforming capability. Via menu control, the user first selects the radio technology implemented in the device under test.

Jürgen Kausche of Rohde & Schwarz is presenting the TS8997 test system

The test system meets the requirements of the ETSI standard. This is due, among other things, to the system’s high sampling rate greater than 1 MSample/s with a measurement time of up to 32 seconds. A long measurement time is necessary in order to carry out a wideband measurement covering the entire scope of the signal and determine various parameters such as output power, average power and peak power. Power measurement and measured-value recording are controlled by a shared trigger, allowing for the reliable determination of the total transmit power.

The EMC32 software, a standard solution in EMC test labs, guides the user through the individual test cases, which actually run fully automatically. “The test system saves all samples taken and subsequently evaluates them. No alternative commercial solution for this type of power measurement has been available until now”, Jürgen Kausche affirms. In addition, the EMC32 basic software includes several upgrade options, making the test system ready for the future. Other equipment of the company can be used with the test system if required. The system also supports measurements in the 5 GHz band in line with ETSI EN 301 893 V1.7.1. This is especially beneficial to manufacturers of WLAN devices that support both the 2.4 GHz and the 5 GHz band in line with IEEE 802.11 a/b/g/n.

 

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