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hw to introduce phase distortion in the Rf signal ?

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dhavalelectron

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hw to introduce phase distortion in the Rf signal ?

Actually, i want to measure EVM introduce by my Power Amplifier. i have tried by driving my PA into compressing region but its Rms EVM value is 0.5% only.
so, i think there is some problem in measuring so i want to introduce Phase distortion and measure EVM ?

Thanks,
Dhaval Patel
 

kspalla

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Pre-distortion circuits gives the AM to AM and AM to PM.
I guess the driver amplifier for your PA is not driving sufficiently. Check the same for 3dB compression
 

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