On Thu, Oct 10, 2019 at 03:17 AM, Kurt Poulsen wrote:
Wrong, the cables are part of the NanoVNA hardware and cancelled out during calibration.
That's Wrong. You cannot cancel bad cable effect with calibration. You can only reduce it for a little.
For example, here is calibration+measurement performed with rg174 32 cm (which come with NanoVNA) and with rg405 10 cm. See attachment.
The test cases are following:
1) perform calibration with rg174
2) measure rg174
1) perform calibration with rg405
2) measure rg405
If it were possible to eliminate bad cable effect (as you mentioned), both measurement will be exactly the same. But they are different, and rg174 are much worse.
