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When planning your in-house EMI testing kit, it is important that you understand the differences between debugging or general troubleshooting EMI problems and pre-compliance. A set of near field probes or RF Current probes is used for general troubleshooting. This can also be combined with a spectrum analyzer and an RF-capable oscilloscope. The goal of this is to locate sources of harmonic energies and find fixes that decrease harmonic amplitudes. Relative changes are what we are looking for. Full compliance testing procedures are meant to produce exact, calibrated measures. However, relative measurements can be used for troubleshooting.
To get the best results, the radiated-and-conducted emissions test is typically performed in a semianechoic room or GTEM cells. This allows for outside...