Sentinel Automatic Antenna Tracker User Guide v1.7
AAT – Quick Start guide - using the AAT
This is intended for users who just want to get going without reading the full manual:
Initial power up state: the AAT will center pan and point at an angle slightly above the
horizon. The unit can be manually aimed for manual tracking if required. This state will
remain until a valid telemetry signal is received.
FC disarmed state: when the AAT receives a valid telemetry tracking command, it will point
vertically and due North to indicate to the user that the AAT is ready. This state will remain
until the FC enters FC armed state.
FC armed state: when the aircraft is armed, once the aircraft has moved outside its
activation perimeter (10 meters), it will engage and point at the aircraft.
FC armed state: if the aircraft moves back within the activation perimeter, the antenna will
point vertically.
If enabled, the AAT will provide audible warning for loss of telemetry data or low battery.
Note: The position of the aircraft and it’s tracking is relative to the home position of the
aircraft and not the AAT unit itself. AAT should be placed near the set home position.
Note: a power cycle is needed if swapping between NTSC / PAL. It may also be required if
the aircraft is powered up after the AAT (verify by the telemetry LED).
To use the AAT:
1. Power up the aircraft
2. Power up the AAT (power cycle if telemetry LED is not active)
3. Turn the AAT until the antenna points due North
4. Verify the AAT is receiving valid data (antenna points vertical and telemetry LED = ON)
5. Arm aircraft close to the AAT (with minimum sats needed by the FC)
6. Launch aircraft
7. Verify antenna is tracking as soon as practical after launch (visual / audible movement)
Optional - Setting AAT flight direction (if crossover point is in main direction of flight) :
1. Use mobile phone compass app and point in direction in wish intend to mostly fly
2. Set “yaw adjust value” on AAT to be same as compass reading and save settings
3. Turn AAT until Antenna points North
4. Optional fine adjust manually in flight for perfect accuracy
SENTINEL AAT is 13V maximum supply –a 3S LiPo
