This paper interprets the impairments affecting design validation, characterization and testing of power amplifiers (PA). With the EVM contribution of the PA limited for 802.11ax to at most -46 dB, greater linearity and dynamic range requirements are needed for the PA and the RF test equipment. The zSeries-PA/FEM test equipment and zSignal software provide a complete solution for qualifying PA performance for operation within an 802.11ax transmitter design.
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