Herelink PPM Output

I am trying to use the RC output of the Herelink AirUnit with a flight controller that can only use a PPM input. An online manual mentions the 4-pin connector being Sbus in phase, Sbus inverted, or PPM out. I probed the wires with an oscilloscope and it looks like SBus, is there a way to configure the unit to output the PPM signal? Or is my best bet to find a cheap SBus to PPM converter instead.

Thanks in advance, Chris.

You need external hardware to convert SBus to PPM.