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It has been modeled to fit:

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•    Voltage Gain (at all LO frequencies in datasheet)

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•    P1dB

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•    PSD

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•    EVM (at -5dBm output power)

The system diagram '8PSK Modulator' has been set up to emulate the test conditions in the datasheet i.e.

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•    V_inBB          98mV single-ended in quadrature

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•    f_BB 50KHz

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•    LO power       8dBm

The time domain analysis settings are sample rate of 26 MHz and oversampling of 520. The sample rate is so that the spectrum 13MHz either side of the centre frequency can be plotted to see the PSD and compare to the datasheet spec. The two numbers together (26MHz/520) yield the default system data rate of 50kHz.

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%EVM (ns) OPSK Modulation test Time%EVM OPSK Modulation test
1.3801e3601e+081.0686404772

Graph - I and Q Voltage Spectrum

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