Difference between revisions of "MiniVNA ICD"

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(Frequency Generator)
Line 40: Line 40:
 
Controller to VNA:
 
Controller to VNA:
 
<pre>
 
<pre>
0{enter}
+
0
f(kHz)*10737.41824{enter}
+
f(kHz)*10737.41824
1{enter}
+
1
0{enter}
+
0
 
</pre>
 
</pre>
 +
 
Response:
 
Response:
 
''TBD''
 
''TBD''
 +
 +
Reset:
 +
<pre>
 +
0
 +
0
 +
1
 +
0
 +
</pre>
 +
 +
Example:
  
 
[[Category:Instruments]]
 
[[Category:Instruments]]

Revision as of 21:30, 18 May 2009

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


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: