S-Parameter Export

The NanoVNA-F V3 can export measurement data as standard Touchstone files (S1P and S2P) for use in simulation software, spreadsheets, or further analysis on a PC.

Save an S1P file (S11 only)

S1P files contain single-port reflection data (S11).

1. Complete your S11 measurement.
2. Tap STORAGE → S1P.
3. The file is saved to the device’s internal storage.

Save an S2P file (S11 + S21)

S2P files contain both reflection (S11) and transmission (S21) data.

1. Complete a measurement that includes both S11 and S21 data.
2. Tap STORAGE → S2P.
3. The file is saved to the device’s internal storage.

Note

S2P export requires both S11 and S21 measurements. If you only have S11 data active, the S21 values in the exported file will not be meaningful.

View stored files

Tap STORAGE → LIST to see all saved files on the device.

Transfer files to a PC

1. Connect the NanoVNA-F V3 to your computer via USB-C.
2. Enter U-disk mode: power off the device, then hold the middle button while powering on.
3. The device appears as a USB mass storage drive.
4. Copy the .s1p or .s2p files from the drive to your computer.
5. Safely eject the drive and restart the device.

Using exported files

Touchstone files are a widely supported standard. Common tools that accept S1P/S2P files:

Tool	Platform	Use case
NanoVNA-Saver	Windows, Linux, macOS	Re-plot and analyze VNA data
SimSmith	Windows, macOS	Smith chart impedance matching
QUCS / QucsStudio	Windows, Linux	Circuit simulation with measured data
MATLAB / Octave	Cross-platform	Custom data analysis and scripting
Spreadsheet (CSV import)	Any	Manual data inspection

Tip

Touchstone files are plain text. You can open them in any text editor to inspect the raw frequency and S-parameter data. The format uses frequency in the first column followed by real/imaginary or magnitude/angle pairs.