Retired RF engineer here.
I’ve been slowly adjusting the FlightFeeder Orange box gain in an attempt to get the best results. Like most, just based on the number of ‘overloads’. I’m curious how FA implements the gain function. Does lowering the gain affect the front-end noise figure? Or is it simply an adjustment further down the RF chain where it has minimal impact on NF? I’d like to lower the gain a bit more, but not at the expense at raising the front-end NF.
I guess another question would be “Is there even a FE amp?” or does the antenna feed right into the A/D chip and the NF is determined by the A/D chip?
Sure would be nice to see a cascade analysis of the RF chain!
Sorry if this has been discussed, I checked around the forum and didn’t see any comments pertaining to this question. Plenty of NF comments, just none for gain vs. NF.