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This document details how to specify harmonics for a ZigBee FEM. It reviews the requirements from the different regulatory standards, analyzes through simulation harmonics content of offset quadrature phase-shift keying (OQPSK) spread spectrum modulation and evaluates the effects of the measurement bandwidth and detector on the harmonics level of both sine and ZigBee waveforms. Finally, measurement data is provided to illustrate the simulations results.
