Pixhawk Mini RC Passthrough


I have a Pixhawk Mini powering a hexacopter and I need to pass through a couple auxiliary channels. Six of the main output PWM channels are going to the ESC's, but I want to get two more PWM channels on 7 and 8. I have AUX1 and AUX2 set to Channels 7 and 8 (respectively) in the pixhawk parameters. Am I missing something with this setup?  

Using an oscilloscope on channels 7 and 8 on the PWM breakout just gives a steady signal that doesn't change with RC input..

Any thoughts would be much appreciated.



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