The firmware for NanoVNA-H needs to be recompiled before it can be used. You need to modify the MCU and LCD drivers and some UI changes. You can view the code of AA6KL. AA6KL has completed most of the work. Measurements up to 1.5G are difficult to guarantee 50dB dynamics. The current test results seem to be able to obtain relatively accurate measurements in a dynamic range of 40dB.
hugen
