Thanks for your response Gyula. However as I wrote the frequency step will change if I change frequency range. In my example case the step changes from 9 MHz to 90 kHz each, that is a change that corresponds to the change of stop frequency from 900 MHz to 9 MHz. And the question remains what happens with accuracy in the lower range, now 50 kHz to 9 MHz, still with 101 steps. And yes, I know very well how to calibrate. I know that I can do many things with various PC software, but right now I am concerned with the NanoVNA itself.
73/Torbjorn
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11 feb. 2020 kl. 16:29 skrev Gyula Molnar <gyula.ha3hz@...>:
When you pick up the frequency range, you determine the location of the steps - you will get a wrong result without calibration. So after recording each frequency range, first Reset, then Calibrate and finally save if you need the range later. Q-0.4.4 performs averaging, which must be selected before calibration. After selecting a new range, first Reset, then Calibrate and then save to a memory location. (0-4)
You can take several steps if you use nanoVNA-Saver. With the nanoVNA-Saver, you can record, calibrate, measure and save countless quantities and save it to your PC.
I hope I was able to help you.
73, Gyula
