MiniVNA ICD

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The miniVNA is a small and inexpensive antenna analyzer from mini Radio solutions. It connects to a computer via USB and it can measure SWR, RL, Rs, Z +/-jx, Phase, Cable length, R/L/C in the range 0.1Mhz to 180MHz. It comes with a quite all right control software for windows. There is also a Gnome version of the software called gVNA. Unfortunately, it depends on GNOME, it hasn't been updated for three years now and I have never been able to build it.

This document describes the miniVNA USB protocol that has been reverse engineered from user manuals and available software. The purpose is to have a control reference for writing a new control application for the miniVNA.

Contents

Connection Details

Baud rate: 115200
Data bits: 8
Parity: None
Stop bits: 1
HW flow: None

In the following, each line is terminated with an enter, i.e. 0x0D character.

Modes

The miniVNA can work in two modes:

  1. Reflection mode – used for measuring various parameters on antennas and cables.
  2. Transmission mode – used for measuring filters attenuators, etc.


Constants

DDSRATIO = 10737.41824
DDS increment for a 1kHz signal. Multiply the desired frequency in kHz with this constant.


Frequency Generator

Controller to VNA:

0
f(kHz)*10737.41824
1
0

Response: TBD

Reset:

0
0
1
0

Example: