I have a RX chain whose cascaded noise figure increases, then decreases after a mixer (which is not possible?!) before increasing down the chain. The final cascaded noise figure reported is 1 dB lower than one calculated by spreadsheet. The help files mentioned that I check the cascaded gain, which I did, and it is correct. I also increased the no of noise points, with didn't help. Are there other factors that I should have taken care of? What is happening here?
https://edasupportweb.soco.agilent.com/pls/portal/support.show_topic?id=1028&highlight=noise+decreases
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