Using a calibrated nanoVNA (0.5-900MHz) using the supplied black cables and a female-female barrel for connecting the calibration OPEN/SHORT/LOAD to the black cable connected to CH0 I tested if I could see any difference between having an OPEN connected to the female-female barrel connector to the black cable to CH0 or only the female-female connected to the black cable to CH0
I could not see the difference between with of without OPEN on the display of the nanoVNA at 900MHz.
But with or without the female-female from the black cable is very visible at 900MHz
Maybe I need better glasses, or a nanoVNA with a bigger screen.
