we have two questions about the noise figure measurement:
1. Is it possibile to measure the noise figure if the AD8368 is in AGC mode?
2. When an signal is not given at input of component, what is its gain when the component is in AGC mode?
These questions are needed to understand if it is possible to use the gain method (explained here Three Methods of Noise Figure Measurement - Tutorial - Maxim ) to measure the noise figure when the part is in AGC mode.