Erik, thanks again. I do have one more question, regarding the harmonic mixing part above 5.34GHz. I used the NanoVNA's generator's third harmonic (of 1.78GHz) at around -40dBm to run the calibration mentioned before. It succeeds but does not seem to be correct as there is a noticable jump in the noise floor and the amplitude of the tone jumps with it when going over this transition. So I manually corrected this (see corresponding attached plot). Shifting this second part of the spectrum by about -12dBm seemed to have fixed the problem, also for the LNA case seperately. Calibrations seems correct over at least a 50dBm dynamic range.
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While understanding a certain amount of noise increase at higher frequencies, I am quite puzzled why it is so much. It seems to be rising with 10dBm/GHz until levelling out at around 9GHz with -40dBm in the hand-calibrated case. Is this much noise typical for the TinySA - or have I gotten a bad one?
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I also would like to have a more smooth noise floor over the entire spectrum without these bumps. Can this be accomplished using the input level table?
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Thanks in advance
Lutz
