Receiver Hott SUMDO or SUMD consistent PixHawk

My receiver Graupner Hott GR 16 can be configured SUMO (PPM) or SUMD (digital).
Do one or the other (or both) is compatible with the PX4 Pixhawk cards?
kind regards.

PPM will work.

Did you get SUMD or SUMD HD to work ?
I just tried all, and only SUMO (PPM) works for me, according to - at least one of the SUMD versions should work.