WFLYET16S can't work with this HeadTracker

[Buantum]

When the head-tracking signal is transmitted to the WFLYE et16s through the trainer port, the rudder position fluctuates. Could this be related to WFLYE's non-standard PPM format? I found the following article mentioning that WFLYE's format is different.

Fixed-Wing Model Aircraft - Self-Developed FPV Head-Tracking - Article by Wang Lixue - Zhihu
https://zhuanlan.zhihu.com/p/539011166

[dlktdr]

Which board are you using?

Is the fluctuation showing in the GUI's Channel monitor as well?

Only thing I see that is different is it shows the level is 5V. Often the 3.3v PPM out is high enough most devices pick it up okay still.