©2021 Swellpro Technology Co., Limited 31
When the drone is floating amongst waves, it may occasionally display a Gyroscope message due to
the movement of the waves, which is normal and can be ignored.
Gyroscope calibration is necessary if:
1.
If the remote-control prompts "WARNING Gyroscope error Calibrate Gyroscope".
2.
When in GPS flight mode and using only the THROTTLE joystick, the drone drifts at an angle.
3.
When in ATTI flight mode and using only the THROTTLE joystick, the drone body tilts.
4.
The drone has been subjected to heavy shaking during transportation.
Gyroscope Calibration Process:
1.
Place the drone on a horizontal surface. Power on the remote control then the drone.
2.
The drone must remain perfectly still and free of all vibrations or movement.
3.
Pull the left throttle stick vertically to the lowest position and at the same time quickly move the
right stick left and right, until the front and rear arm lights flash alternately or the remote-control
display screen prompts "WARNING Aircraft Initializing, Please Wait" to indicate that it has entered
calibration
4.
Do not move or control the aircraft during this process. Within 20 seconds, the front and rear arm
lights retreat Flashes alternately, the red light on the front arm is flashing quickly, and the green light
on the rear arm is steady on, or the remote-
control display. The “WARNING Aircraft Initializing, Pleas
e
Wait” prompt disappears on the screen, indicating that the calibration was successful. Restart the
aircraft.
Note: If the warning message “WARNING Aircraft Initializing, Please Wait“ remains on the screen, the
calibration has failed and needs to be repeated.
Aircraft Antenna
The radio antennas of the drone can be oriented either upwards or downwards to maximize reception in
different situations. The SD4 has an effective range of over 5km while airborne. Due to the way radio waves
travel, when flying just 0.5m above the water, range is still up to 2.8km and floating on the water surface
the transmission range is 500m.
Generally, upward pointing antennas improve reception when the drone is floating or operating close to the
water surface. Orienting the antennas downwards maximizes range for higher altitude flights. Adjust the
antennas individually or together to maximize range for your planned flight.
Antenna oriented upward: Improves reception when the drone is floating on the surface of the water (boat
mode) or for low altitude flight.
Antenna oriented downwards: Improves reception when the drone is flying further or at higher altitudes.
To adjust the antenna position, loosen the holding nut at the base of the antenna, adjust the antenna
position and retighten the nut.
