Yea I purchased better a calibration kit for it. The one that came with it had a load of 51.6 ohms (not terrible). The new kit is 50.3 ohms on the load. It seems to be reading something with nothing connected. The smith is reading 59.3 ohms when its "open"
The latest release causes this clone to pick up random readings with nothing connected making the traces go crazy. It seems to be pushing the limits on the STM32 F072C8T6. I have to try to find a older firmware.
Thanks Larry.