Electromagnetic Interference, EMI can cause problems when close by electronic items operate simultaneously. Accordingly Electromagnetic Compatibility, EMC is a key issue in a world filled with electronics that is operating in close proximity of other items 24 hours a day.
We have all come to expect that our variety of electronic gadgets - everything from mobile phones to laptops, computers and even items like heating timers and the like will all be able to operate without causing mutual interference.
However without rigorous testing, interference issues can abound and accordingly EMI and EMC testing is a major issue for all developers.
Testing for electromagnetic interference, EMI and the resulting impact on electromagnetic compatibility is key. Even though the formal EMC testing is done at an approved test house, informal EMI / EMC testing must be undertaken during the design. EMC issues discovered early int he design phase are much easier to resolve than those delivered later one when many elements of the design are fixed.
The links below provide some key insights into various elements of EMC and EMI testing.
Household appliances with thermostats such as refrigerators, air conditioners, washing machines or tumble driers generate discontinuous disturbances, which are referred to as click disturbances. These clicks occur sporadically, and are therefore subject to limit values different from those applicable to continuous disturbances. Find out more about testing these disturbances and performing click rate analysis in accordance with CISPR 16-1-1 and CISPR 14-1 / EN 55014-1. The equipment described features realtime graphic display of the maximum peak and quasi-peak values. After the measurement, a test report can be displayed and printed.Read more
This is a particularly useful application note that explains how to detect, characterise, find and document interferers in cellular networks using the R&S®FSH spectrum analyser. There is plenty of useful information about interference detection and hunting as well as that on how to use the FSH spectrum analyser.Read more
Debugging a circuit to ensure that it met s the requirements needs the right equipment. Using the R&S Spectrum Rider spectrum analyzer with the R&S HX-15 near field probes provides the needed insight into how signals are being radiated from a board and hence it becomes possible to introduce and test measures to reduce the EMI issues. Find out more . . .Read more
Electromagnetic interference is a key parameter that must be considered when designing a new item of electronic equipment, and the right test approach and equipment must be adopted. The R&S RTO / R&S RTE digital oscilloscopes are valuable tools for analyzing EMI problems in electronic designs. High input sensitivity, high dynamic range and a powerful FFT implementation are key features for capturing and analyzing unwanted emissions. Using these scopes will help reduce problems occurring further along the design process, thereby saving considerable costs.Read more