To test out my nanoVNA-H over LF to about 50MHz I dug out a SMD airwound inductor of just over 240nH. I measured it in three ranges and stitched the results together to allow a log plot from about 100kHz to 50MHz.
The results below are quite good I think. The nanoVNA struggles a bit at 100kHz but from about 500kHz onwards the nanoVNA does a very good/stable job of measuring the inductance of the SMD coil and the red series resistance trace looks good too with a fairly smooth response across the frequency range. The resistance trace starts to misbehave a bit above 35MHz but this is a very good result for a low cost VNA.
