With shrinking spectral bandwidths and more intense use of the remaining frequency areas, the importance of good electromagnetic\ncompatibility (EMC) performance of professional wireless microphone systems, as used by broadcasters, is increasing. A wireless\nmicrophone system consists of one or more pocket or handheld transmitters and usually the same amount of receivers. Both have to\nbe immune against disturbances, and on the other hand they should not produce interferences.\nThis paper deals with electromagnetic compatibility (EMC) performance tests of three analogue professional wireless microphone\nsystems. The authors describe the complete measurement procedure using two different setups. These setups employ the pocket\ntransmitter or the receiver as device under test (DUT). Different disturbance signals are used utilizing amplitude modulation (AM),\nfrequency modulation (FM) or digital video broadcast-terrestrial (DVB-T). The audio quality of the transmission system is rated with the\ntotal harmonic distortion plus noise (THD+N). Additionally, the authors investigate intermodulations (third harmonic) caused by the\ntransmitter. The results of all performance tests are extensively discussed.
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