I've attached the block diagram of the setup. (ADL5380 eval bd. feeding the ADRF6516 Eval Bd). The VGA was set to max gain (111) and gain control voltage to .6 V , which correspond to 27.5 dB voltage gain. I should be getting gain of 18.2 not 16 dB also IIP3 should be better than 3 dBm. Also input power of two tones was -20 dBm. Each I/Q line out of ADL5380 was loaded with 316 shunt resistor so that demod sees 450 Ohm approximately.
Also the gain is referenced to single I or Q and I accounted for noise folding which resulted in total of 18.5 dB NF at the same gain setting.
Can they confirm?