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8.2 Airborne Radio System (ARS)
8.2.1 Mounting SkyLink ARS
Install the SkyLink ARS in the airframe in a location that allows easy access to the
autopilot and minimal RF coax length for antenna installation.
Install the omni antennas on the airframe in a location that reduces shadowing and
interference between the omni antenna and the GRS. Ideally one antenna on opposite
sides of the airframe. Refrain from installing the antennas near other antennas or other
electronic equipment already on the airframe to reduce EMI.
The truFYX GPS needs to be installed on top of the airframe in a location that reduces
shadowing and allows a clear view of the sky.
8.2.2 Connections
The SkyLink ARS offers seamless integration with the uAvionix George autopilot line,
Pixhawk, or any autopilot that has an available RS-232 communication line.
A wire harness is included with the following three terminations:
•
GPS
source for truFYX
•
User
data link for autopilot connection
•
Control
data link for ARS device setup and configuration
Ensure that the two omni antennas or RF loads are attached to both RF ports on the
ARS before powering on.
24v power source can be supplied through either the User data link or Control data link
connector.
Connection to an autopilot is done via the User data link to an available telemetry or
serial port. The SkyLink ARS uses RS-232 levels and has a default rate of 57600 8N1
George Autopilot
Connection to George autopilot will be made using serial 1 on the autopilots. For more
information on George G2i and George G3 pinout, please review the respective
manuals at
https://uavionix.com/products/george/
A Standard G3 Harness can be used instead of the included SkyLink Harness.
Pixhawk Autopilot
When connecting to a Pixhawk, use the included RS-232 to TTL adapter. Connect the
Pixhawk via the User data link. SkyLink must have an external 24v power supply
connected through the Control data link as the Pixhawk will not supply 24v.
