On Thu, Aug 6, 2020 at 01:07 AM, Larry Rothman wrote:
I was playing with the TDR on my H along with using your NanoVNA.exe 0.1.67
and they don't match.
The Nano shows the correct length of my coax at just over a meter but your app
shows close to 4X as much.
Is there an issue or did I mis-configure your app?
See the two images.
One thing you need to make sure of is that the velocity factor is set correctly on both the VNA and any PC software Larry (0.72 in my case). Just made a measurement on a short patch lead I use here, it seems very accurate on a large frequency span down mm accuracy.
I'll go see if we have any longer coax pieces to measure in the 4M range.
