my last post answered your question, showing the calibration spectrum with the old LNB Inverto Black Ultra Twin and N = 9 connected to the Amiko engine which is only available on TBS 6983 Tuner B (that other picture that is posted).
Still TBS 6983 Tuner A with N = 9 shows a calibration spectrum that is the same as in the post #892 RE: IQmonitor tool (that's why I didn't set it up now).
P.S. I don't want to be boring, you don't have to answer, I just wanted to show that the TBS 6983 Tuner A doesn't do a good calibration spectrum, while the Blindscan works well.
Greetings