A multiplatform tool to save Touchstone files from the NanoVNA, sweep frequency spans in segments and generally display and analyze the resulting data.

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README.md

NanoVNASaver

A small tool to save touchstone files from the NanoVNA, and to allow sweeping frequency spans in sections to gain more than 101 data points.

Introduction

This software connects to a NanoVNA and extracts the data for display on a computer, and for saving to Touchstone files.

Current features:

Reading data from a NanoVNA
Splitting a frequency range into multiple segments to increase resolution (tried up to >10k points)
Displaying data on Smith charts and logmag-charts for both S11 and S21
Displaying two markers, and the impedance and VSWR (against 50 ohm) at these locations
Exporting 1-port and 2-port Touchstone files
TDR function (measurement of cable length)

Expected features:

Mouse control of markers
Further data readout for markers, such as return loss/forward gain
Reading and displaying Touchstone files

0.0.2: 0.0.1:

Windows

The software was written in Python on Windows, using Pycharm, and the modules PyQT5, numpy and pyserial.

Linux

In order to run this app in Linux environment, you'll need the following packages:

python3-serial
python3-pyqt5
numpy

To Run

python3 nanovna-saver.py

License

This software is licensed under version 3 of the GNU General Public License. It comes with NO WARRANTY.

You can use it, commercially as well. You may make changes to the code, but I (and the license) ask that you give these changes back to the community.

Credits

Original application by Rune B. Broberg (5Q5R)

TDR inspiration shamelessly stolen from the work of Salil (VU2CWA) at https://nuclearrambo.com/wordpress/accurately-measuring-cable-length-with-nanovna/

Thanks to everyone who's tested, commented and inspired.