Measurement And Analysis Of Conducted Emissions Using The Spectrogram
- Author: Dr. Francisco Javier Pajares, Dr. Albert-Miquel Sánchez, Dr. Joan Ramon Regué, Eng. Ivan Garcia, Eng. Marco Bosi, Eng. Jordi Accensi
All electric and electronic equipment must comply with electromagnetic compatibility standards that limit the amount of interference that they can emit. However, the process to mitigate this interference can be sometimes overwhelming, especially if the device under test presents different modes of operation. In this case, it is needed to find which mode presents the worst-case scenario and if it can cause the test to fail. This becomes a long and tedious process when the measurements are not done with a suitable tool. In this application note, these measurements are done with EMSCOPE, a conducted-emission measurement instrument able to perform fast and agile measurements in the whole frequency band, using its spectrogram function (also known as waterfall function) and combining it with measurements of the common-mode and differential-mode emissions.
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