FPV AIR UNIT

Contents

• EN Quick Start Guide

• Camera parameters

• CHS 快速入门指南

• 相机参数

Disclaimer

Congratulations on purchasing your new CADDXFPV product. The information in this document affects your safety and your legal rights and responsibilities. Read this entire document carefully to ensure proper configuration before use. Failure to read and follow instructions and warnings in this document may result in serious injury to yourself or others, damage to your CADDXFPV product, or damage to other objects in the vicinity. This document and all other collateral documents are subject to change at the sole discretion of CADDXFPV. Visit www.caddxfpv.com for the latest information for this product.

By using this product, you hereby signify that you have read this disclaimer and warning carefully and that you understand and agree to abide by the terms and conditions herein. You agree that you are solely responsible for your own conduct while using this product, and for any consequences thereof. You agree to use this product only for purposes that are proper and in accordance with all applicable laws, rules, and regulations, and all terms, precautions, practices, policies, and guidelines CADDXFPV has made and may make available.

CADDXFPV accepts no liability for damage, injury, or any legal responsibility incurred directly or indirectly from the use of this product. The user shall observe safe and lawful practices including, but not limited to, those set forth in this document.

Notwithstanding the above, your statutory rights under applicable national legislation are not affected by this disclaimer.

Introduction

The CADDXFPV Air Unit is an advanced video transmission module that supports a 5.8 GHz digital video signal and 720p 120fps image transmission, with a transmission range of up to 4 km and a minimum end-to-end latency within 28 ms*. The air unit can be mounted on a racing drone and used with DJI FPV Goggles or a remote controller to transmit video, control signals, and flight controller information wirelessly.

Components:

• 1. MMCX Antenna Ports
• 2. 3-in-1 Port
• 3. USB-C Port
• 4. microSD Card Slot
• 5. Link Button
• 6. Linking Status Indicator
• 7. Camera

* The end-to-end latency is the total time from camera input to screen display. The device is able to reach its minimum latency and maximum transmission distance (FCC) in a wide open area with no electromagnetic interference.

Connection

Refer to the illustration below to mount and connect the air unit to a racing drone.

3-in-1 Cable (Power, DJI HDL, UART):

• RED: Power (7.4-17.6 V)
• BLACK: Power GND
• WHITE: UART RX (Connects to Flight Controller OSD TX, 0-3.3 V)
• GRAY: UART TX (Connects to Flight Controller OSD RX, 0-3.3 V)
• BROWN: Signal GND
• YELLOW: DJI HDL (Connects to Flight Controller S.Bus, 0-3.3 V)

• An electric soldering iron and soldering tin are required for connection. Make sure that there are no short circuits or open circuits when soldering the cables.
• There are up to eight channels for the air unit depending on the region (FCC: eight, CE/SRRC: four, MIC: three). Each channel has a bandwidth of 20 MHz. The public channel is 8, which is the default channel when the equipment is powered on. The channel can be changed manually to avoid interference from other devices.
• The air unit may become hot during or after operation. DO NOT touch the air unit before it cools down.
• DO NOT use the air unit for an extended period when the temperature is high or there is poor ventilation. Otherwise, the air unit may overheat and enter low-power mode which will affect its performance. If the air unit enters low-power mode, restart it or wait for it to cool down and it will automatically return to normal.
• Keep the antennas of the air unit at least 40 mm apart. Keep the air unit away from metal objects or carbon fiber frames. Make sure to choose a position where the transmission will not be blocked during flight.

Activation

When powered on, connected the air unit to your computer and run DJI ASSISTANT™™ 2 for activation. Download DJI Assistant 2 at https://www.dji.com/fpv/downloads

Linking

The air unit support three linking methods: A, B, and A+B (Must link A before B).

Method A

1. Power on the air unit and the DJI FPV Goggles.
2. Press the link button on the air unit and the goggles.
3. The linking status indicator of the air unit turns solid green. The goggles stop beeping when successfully linked and the video display is normal.

Method B

1. Power on the air unit and the DJI FPV Remote Controller.
2. Press the link button on the air unit, and then press the record button, C button, and right dial on the remote controller simultaneously.
3. Both the linking status indicators turn solid green when successfully linked.

When ready to link, the devices will give the following indication:

• Air unit: the linking status indicator turns solid red.
• Goggles: the goggles beep continually.
• Remote controller: the remote controller beeps continually and the status indicator blinks blue.

OSD display settings

Use the Betaflight configurator for OSD settings. Connect the air unit to the flight controller via UART and configure the ports.

1. After connecting the UART cable to the flight controller, take the Betaflight flight controller software setting as an example. Open the corresponding UART port and click save.

2. Select telemetered and OSD. Click save.

3. Select the display content you need in the OSD page (some OSD are not supported, please wait for subsequent updates).

• Telemetry output
• LED_STRIP
• DISPLAY
• CHANNEL_FORWARDING
• TRANSPONDER
• AIRMODE
• OSD

4. Select Settings-Display-Custom OSD ON in DJI FPV Goggle.

Operating channel

Make sure you fully understand and abide by local laws and regulations before using this product. An amateur radio license may be needed in FCC regions when using channels 1, 2, 6, or 7, as they are amateur frequency bands. Users who use the amateur frequency bands with a modified or cracked version or without a license may be punished for breaking local laws or regulations.

Specifications

• Weight: Air Unit (Camera not included): 31g; Antenna: 3.74 g (MMCX straight); 3.9 g (MMCX elbow); 6 g (reverse polarity female SMA)
• Dimensions: Air Unit: 44×37.8×14.4 mm; Coaxial Cable: 110 mm
• Operating Frequency: 5.725-5.850 GHz
• Transmitter Power (EIRP): FCC/SRRC: <30 dBm; CE: <14 dBm
• Min. Latency (end-to-end): Low Latency Mode (720p 120fps): <28 ms; High Quality Mode (720p 60fps): <40 ms
• Max. Transmission Distance: FCC/SRRC: 4 km; CE: 0.7 km
• Video Format: MP4 (Video format: H.264; Audio format: AAC-LC)
• I/O Interface: USB-C, MMCX, 3-in-1 port, microSD card slot
• Supported Flight Control System: BetaFlight
• Operating Temperature Range: 0° to 40° C (32° to 104° F)
• Input Power: 7.4-17.6 V

Camera parameters

Caddx cam

• Model: Caddx cam
• Weight: 8g
• Dimensions: 20.7×19×19mm
• Image ratio: 16:9/4:3
• Min.Latency: 720p 120fps < 28ms; 720p 60fps < 32ms
• Sensor: 1/3.2" CMOS
• Shutter: Rolling shutter
• Iso: 100-25600
• Min. Illumination: 0.00003Lux
• FOV: 150° (D);122° (H) ;93° (V)

Polar cam

• Model: Polar cam
• Weight: 9g
• Dimensions: 24×19×19 mm
• Image ratio: 16:9
• Min.Latency: 720p 60fps < 32ms
• Sensor: 1/1.8" CMOS
• Aperture: F/1.6
• Shutter: Rolling shutter
• Iso: 100-25600
• Min. Illumination: 0.00003Lux
• FOV: 162°(D);138°(H);75°(V)

Menu board

Polar camera supports menu board adjustment, this function needs self-soldering, please be CAREFUL not to damage the camera structure during welding.

1. Remove the screws of the back cover. Remove the nylon spacers.
2. Solder the menu wire and the gnd wire. Install the back cover. Connect the OSD menu board.

Controls:

• 1. Left/Right button: Control the increase or decrease of saturation.
• 2. Up/Down button: Control the increase or decrease of brightness.
• 3. Middle button: Short press to save, long press for 3 seconds to restore factory settings.

* Menu board needs to be purchased separately.

CADDXFPV Support

Email: Support@caddxfpv.com

Caddxfpv official website

This content is subject to change. Download the latest version from https://www.caddxfpv.com/pega/download