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Power output accuracy with source attenuator

Question asked by kfloong on Jul 6, 2014
Latest reply on Jul 7, 2014 by daras

I have a question on using the source attenuation auto range on the PNA-X (N5245A, H85).
My application would require known/traceable power levels at the test port. 
If I performed source/receiver cal at one power level, will the calibration still be valid when the PNA changes the source attenuator levels automatically when measuring at different power levels?

I left the source attenuator offset on and treat R1 as a power reference.

thank you!