vna/J 3.1.12 available

The new version 3.1.12 of vna/J is released.

The application JAR can be downloaded from here as usual. The following updates are included in this version:

  • Option added to driver selection dialog to display all available serial ports on system
  • List of cable types in cable length dialog is loaded from cables.csv in vna/J config directory. Default file is created automatically.
  • Frequency ranges for bandmap in main diagram is loaded from bandmap.csv in vna/J config directory. Default file is created automatically.

Driver Guide for the miniVNAtiny updated

I've updated the driver guide for the miniVNAtiny reflecting the removed filter-mode.

Thanks to Andrew Rich, VK4TEC and Geoff Robinson, VK4KJJ we now have a precise power-over-frequency chart in generator mode.

You can find the latest version here.

vna/J 3.1.11 available

The new version 3.1.11 of vna/J is released.

The application JAR can be downloaded from here as usual. The following updates are included in this version:

  • Driver fixed for miniVNA/metroVNA
  • Bug in vna/J update feature fixed
  • Error message fixed on invalid export directory

vna/J 3.1.10 available

The new version 3.1.10 of vna/J is released.

The application JAR can be downloaded from here as usual. The following updates are included in this version:Driver fixed for miniVNApro + Extender

  • Filter code for miniVNAtiny removed
  • Creation of calibration block changed
  • Number of calibration steps limited between 3.000 and 30.000
  • Thanks to some of my Chinese friends for decompiling the code. Keep away of obscure download sources

Driver Guide for the miniVNApro updated

I've updated the driver guide for the miniVNApro regarding the use of the AUTO-RESET checkbox.

You can find the latest version here.

vna/J 3.1.9 available

The new version 3.1.9 of vna/J is released.

The application JAR can be downloaded from here as usual. The following updates are included in this version:

  • Upgraded to purejavacomm-1.0.0.jar
  • Bugs fixed regarding timeout issues on some machines

Compatibility / Kompatibilität

vna/J runs nearly on every plattform, that supports the JAVA runtime environment and has drivers for the FTDI USB chips.

vna/J is successfully tested by numerous users on current MS Windows 10 and MAC OS/X El Capitan.

For full list, please see here.

vna/J läuft beinahe auf jeder Plattform, die eine JAVA Laufzeitumgebung und Treiber für die FTDI USB Chips bereitstellt.

vna/J ist erfolgreich von zahlreichen Anwendern auf dem aktuellen Windows 10 und auf Mac OS/X El Capitan gestestet.

Eine komplette Übersicht findet sich hier.

User guide updated / Quickstart Guide in Deutsch

The chapter "Quick-Start-Guide" was updated in the user guide.

Eine Schnellstartanleitung wurde erstellt.

Quickstart Guide for Windows

 

vna/J 3.1.8 available

The new version 3.1.8 of vna/J is released.

The application JAR can be downloaded from here as usual. The following updates are included in this version:

  • Driver for metroVNA extended
  • Fixed display bug for metroVNA in calibration load/save dialogs
  • Upgraded to jna-4.2.1.jar
  • Upgraded to purejavacomm-0.0.28.jar
  • miniVNA driver optimized for new serial library
  • miniVNA pro driver optimized for new serial library
  • miniVNA Tiny driver renamed to match physical device
  • miniVNA Tiny driver various bug fixes
  • miniVNA Tiny driver optimized for new serial library
  • Cable length measurement should now work for miniVNA again
  • Cable loss dialog extended
  • Number of over samples is now stored inside calibration block
  • Bugs fixed for metroVNA driver

Problems with vna/J on some Windows machines

Three users reported strange problems on their Windows machines. They have exception on the Windows command line like "java.long.Error" which leads to the problem, that no longer any serial ports are displayed in the "Analyzer setup" dialog.

vna/J 3.1.7 available

The new version 3.1.7 of vna/J is released.

The application JAR can be downloaded from here as usual. The following updates are included in this version:

  • Bug fixed in preset loading
  • Group delay scale bugs fixed
  • Graphic export now also works for group delay data
  • Port extension now also works with negative lengths

 

Known bugs

The following bugs are in release 3.1.8 of vna/J.

  • In the data analysis dialog you can open two Smith-charts. When you move the cursor in one Smith-chart and then switch the focus to the other Smith-chart, the cursor is moved back to the starting frequency in both charts.s
  • Auto-scale checkbox is not stored to and restored from a preset file
  • There may be something wrong with the GD scale - has to be verified

"I spend a lot of time tuning filters so that the GD measurement option in V3.1.4 has been quite valuable - prior to this I had to export to Excel and calculate therein. I had updated the GUI to V3.1.5 about a month ago and found that the GD scaling has become unusable with the plot producing negative values and the auto/manual scaling just ramping to some impossible limit which you cannot alter to usable values. I reverted to V3.1.4 so as to enable the correct and very useable scaling.

Can you please confirm these last 2 updates have the observed GD error and perhaps enable a fix - I use XP Pro although I don't believe that this has anything to do with it.

Additionally, is there any reason why the GD function is not enabled on reflection (S11) data? You've probably no apparent reason for doing this (I suspect that a variation of this is used for cable length testing) but in fact it is a very useful parameter in passive filter work. Could this be enabled as it is the same calculation a the transmission (S21) data just a different data set? "

These bugs will be fixed in the near future.

vna/J 3.1.6 available

The new version 3.1.6 of vna/J is released.

The application JAR can be downloaded from here as usual. The following updates are included in this version:

  • Erik, SM3HEW has again updated the Swedish translation
  • Tony, F4GTG has finished the French translation
  • Toshiyuki, JP1PZE has translated vna/J into Japanese
  • Fixed marker data in diagram export