I would like to recover the Null Packets rate, but the value changes from 100% without receiving to 0% when receiving.
My transmission has many Null Packets (about 10%), comparison with the Minitioune software.
How to get the right value with Longmynd?
You ought to have null packets of around 10% to have a stable TS without over-runs. Do you mean you are not getting this from Portsdown or that Longmynd is not displaying the null packets? That's not as far as I am aware part of the package, you would need to use a TS analyser.