PSRR measurement of Amplifier

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gouzou

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Hi

I have a bandpass amplifier (300khz-300mhz) and want to measure the psrr specification.
I can use an HP function generator, producing AC fluctuations over a dc offset set at nominal dc supply voltage (+3.3V).
What should I use as input and what should i measure at the output?
 

Generate a fluctuation over DC Power Supply and change this impacting signal frequency from very low frequencies to few hundred MHz and observe this signal at the output with a Spectrum Analyzer.The difference between what you read on the SA as dBV and peak amplitude(dBV) of your jamming signal on the supply will give you PSRR as dB.
 
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    gouzou

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1) The SA displays rms. I have then to transform the display to peak amplitude for proper ratio computation.
2) Input?
3) Gain=0db?
 

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