Hi,
I have run a test on a Jeti Duplex system which is another 2 way system that provides telemetry. This is from aTU transmitter module installed in an old Fleet Systems transmitter and the Jeti Duplex 4 channel receiver. The PPM plot is:
Again this looks clean but I may be lucky with this setup, perhaps the frame rates are matched accidentally? Perhaps Jeti have locked the Tx module to the handset frame rate?
As you can see I am getting much better at moving the handset stick in a Sine wave motion....
I don't have any other "hack" modules to try.........
Any non-OEM modules are always going to be a compromise so if you really need the ultimate in smoothness stick to the old FM stuff or buy from a single manufacturer and pay the price. Maybe FrSky will produce their own "two way" handset eventually and then the problem will be solved for sure! In the meantime perhaps some software updates could mitigate the jitter effects.
ATB,
Bodmer