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GJB 151B is the Chinese national military standard that contains both the electromagnetic emission and susceptibility requirements for military equipment and subsystems and the measurements by which they are verified. It replaced the earlier arrangement in which the requirements were published in one document and the measurement methods in another, and it thereby removed a source of ambiguity for laboratories and suppliers. The standard defines twenty-one test items arranged in the four families of conducted emission, conducted susceptibility, radiated emission and radiated susceptibility, and it gives for each item the purpose, the applicable frequency range, the limit or the applied level, the equipment set-up and the measurement procedure. For equipment intended for use in ground installations the core set of items is the conducted emission CE102, the conducted susceptibilities CS101, CS114, CS115 and CS116, the radiated emission RE102 and the radiated susceptibility RS103. Test levels and applicability are selected by the platform programme.

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