I am trying to measure 100W amplifier on PNA-X, and I have difficulty to measure Noise Figure in the same time as I measure S-parameter (including stability factor), PxdB and Intermodulation.
In My setup I am using external 35 dB, high power coupler with around 26 dB safety attenuator in to port 2 (See attach block diagram).
Amps that I testing have gain between 50-60 dB and Noise Figure between 5-15dB (not exactly low noise amps). For Calibration I choose scalar with noise receiver. How should I calibrate to get good readings?
The PNA-X is N5242A with FW: A.10.49.11