I'm using a N5182A MXG vector signal generator with the phase noise impairment option. When I enable the phase noise impairment the output level drops by 3 dB. The ALC must be off for what I'm doing. It is very inconvenient having to deal with the level change during testing, has anyone else encountered this or found a way around it?
I have no experience with the model you use.
Do you measure wide or narrow band?
I would assume that measuring wide band the power is the same.
For AM noise or fading the peak power is mostly constant but average power can drop quite a bit.