Such a bold title, such vague blog post – I recently had the pleasure of comparing two very different systems for EMC pre-testing at the lab bench, and one of them gave me an idea.
The two systems were a

• Y.I.C Technologies EMScanner / EMScanner+ / EMScannerR / EMScannerR+ (with an additional capital R, whatever SEO marketing genius came up with THAT idea), which is a base plate that has all of the signal pickup coils already integrated. Advantage being a fast scan since there’s no moving parts – with the drawback that the raster is fixed in X/Y but also Z direction, and the DUT more often than not needs to be placed upside down onto it.