you go into immersion tools to configure the ezuhf rx and enable mikrocopter ppm ch1 box...... i use ch8 for rssi
now you gonna use one servo wire from ch1 on the ezuhf to x2 on naza. i have rssi signal and ground seperate and going into core.
open dji assistant, open tx calli tab and up at the top it has ppm as a option next to traditional/d-bus. click write...... now your back where you were. the switch assignment was different than i had mine hard wired... think mode is ch7, gain ch6,, something like that.
did you get diversity, regular or lite?
EDIT, something came to mind, each of the signal and each of the ground in the board are isolated as well as the rssi ground from the ground buss of the rest of the ezuhf. each needs a ground at all ends to work.