User Manual for DJI O4 Air Unit Series

Quick Guide from the Manual

The DJI O4 Air Unit Series requires activation via the DJI Assistant 2 (Consumer Drones Series) software before first use. Ensure your power supply meets the voltage requirements (3.7-13.2V for O4 Air Unit; 7.4-26.4V for O4 Air Unit Pro). Proper installation is critical for heat dissipation; mount the unit in a well-ventilated area, preferably near propellers, and ensure antennas are at least 5 cm away from metal or carbon fiber structures.

Product Overview

The system consists of a camera module, video transmission module, and antennas. Key components include the USB-C port for data/firmware, a link button for pairing, and a microSD card slot for recording.

Installation and Connection

Important: Do not bend the coaxial cable base. The metal shell becomes hot during operation; do not install in a position easily accessible by hand.

• Wiring: Connect the 3-in-1 cable to your flight controller. The pinout is: Red (VCC), Black (GND), White (UART_RX), Grey (UART_TX), Brown (GND), Yellow (S.Bus).
• Antennas: Must extend out of the aircraft frame and be unobstructed. Maintain a 5 cm distance from the transmission module, camera, and metal/carbon fiber parts.
• Heat Management: Use heat-conductive material to connect the frame and the air unit module to dissipate heat.

Preparation Before Use

Activation: Connect the air unit to a computer via USB-C and use DJI Assistant 2 to activate. Unactivated units have limited transmission power (≤20 mW).

Linking: Power on the air unit, goggles, and remote controller. Use the link button on the air unit and goggles to pair. The linking status indicator will turn solid green upon success.

Usage

Video Recording: Insert a microSD card into the goggles. Recording stops automatically if the card is full, the unit overheats, or the signal is lost.

Transmission Settings: Adjust transmission power and operating channels via the goggles menu. Auto mode selects the best signal strength; Manual mode allows specific bandwidth selection (10/20/40 MHz).

Racing Mode: Supported on specific goggles (e.g., DJI Goggles 3). Disables anti-interference for lower latency; channel must be set manually.

Canvas Mode: Enables OSD elements on the goggles screen. Configure via Betaflight Configurator by setting the MSP switch and defining the serial port.

Troubleshooting EIS and Video Issues

If the video image shakes or exhibits rolling shutter effects:

• IMU Resonance: Ensure the camera is securely mounted. Try changing the ESC PWM control frequency to 48 kHz or 96 kHz. If issues persist, use a softer vibration-absorbing structure.
• Rolling Shutter: Check for damaged propellers and replace if necessary. Adjust the tightness of camera mounting screws.