AQ6 Radio connections
The AutoQuad has one dedicated interface available for connecting a receiver with a serial connection like the Spektrum satellites and Futaba S-Bus, Graupner HOTT SUMD, Multiplex M-Link and PPM sum. PPM uses a PWM connector (M14 by default). Be sure to also check out general Radio Setup page.
Spektrum Diversity Board
If more range or diversity is needed, a satellite diversity board can be purchased to attach more satellites. At the time of writing, the binding is not yet possible from within the firmware so a bind must be made with a full Spektrum receiver and the satellite attached. If you use a Spektrum diversity board, binding can be done with the switch on the diversity board.
Forum thread: Using Spektrum SRXL-bus instead of a simple Spektrum Sat
S-Bus (Futaba, FrSky, etc)
One S-bus receiver (or compatible) can be directly attached to the AutoQuad. As with most flightcontrollers, you need to invert the signal from the S-bus. There are a number of s-bus inverters for sale on various shops ($15).
How to use FrSky X4R S.Bus without inverter
It is possible to modify some S.Bus receivers to output a non-inverted signal. See this link for FrSky X4R instructions.
Diagrams of two connection options are shown here:
PPM support is included in AQ experimental firmware v6.6 r22 and up. If your receiver supports PPM output, or can be converted to provide it, then that output can be used directly. In other cases, a PPM converter/encoder can be used between any standard Rx and AQ.
PPM radio connection
Note: If you’re facing drop outs on the throttle channel (sudden motor glitches), power your receiver and converter via external BEC instead of powering it via the FC or ESC.
Graupner HOTT SUMD
More details about using Groupner SUMD receivers can be found on this page. Here is a connection diagram to get you started.