The instructions for advance settings in the FX state “ Horizontal and Vertical Filters apply only to the RS232 output port destined for Glass cockpits without the ability to filter aircraft heights. FX will do it for them based on your input.”
However, when activated, they stop the output via Wi-Fi to SkyDemon as well. This is very obvious on test and repeatable.
This would not seem to be desirable behaviour filtering the WiFi output to SD but I would like the ability to a filter on the RS232 output ports to the glass cockpit.