The LNA is only good up to 2.2GHz, thats according to Mouser. Since the LNA, when turned on bypasses the attenuator, do we have to expect large errors in gain beyond 2.2GHz? It looks to me that it can do a bit better but maybe not up to 5GHz.
Erik - do you compensate the display via the higher end (or manual) calibration for the decline of the LNA gain? Working with even higher harmonics (like the 7x -> 12GHz) the LNA seem useless, it just blocks everything, while surprisingly the other circuitry keeps up with the LNA turned off. Interesting...
