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As you tune on the imbalance parameters and DC-offset you can improve or degrade EVM results. As the simulation is running you can monitor the data, the average RMS EVM in percent, the pulse shaped signal, the reference IQ plot versus the measured IQ plot, and the output spectrum. A ZigBee output spectrum from R&S test equipment is shown below for reference purposes.


System Diagram - 2_45GHz Zigbee Signal


EVM(VSA.M1,1,1,0,1000,2,0,1,0,0,0,10,1,0,0,0,0) (us) 2_45GHz Zigbee Signal TimeEVM(VSA.M1,1,1,0,1000,2,0,1,0,0,0,10,1,0,0,0,0) 2_45GHz Zigbee Signal