At the datasheet of ADL5382 there is a section that describes noise figure measurement performance, under the effect of a blocker signal.
And there is a plot showing NF vs blocker power.
What is the method used for NF measurement, is it Y-factor without noise source?
My question is not specifically about ADL5382 but any demodulator or down-converting mixer, or LNA, etc.
I mean, at the setup diagram there is no noise source, only blocker signal is injected to the RF input.
How can I measure NF performance with blocker + noise source. I tried connecting noise source to RF input and injected blocker signal with a directional coupler, but NF seems to degrade a lot.
Is my approach correct, any suggestions would be appreciated.
thanks in advance...