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:
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.
The following bugs are in release 3.1.8 of vna/J.
"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.
Windows XP is now retired and no longer supported by Microsoft.
But you can still run vna/J on an PC running Windows XP if you follow these instructions:
I do not recommend running PCs on Windows XP as there will be no longer security updates for the operating system.
Also I do not recommend to user older JAVA versions, as Oracle may no longer release security updates for these runtime environments.
If you encounter problems running vna/J, feel free to contact me.
Here is wish-/feature -list for the upcoming version of vna/J: