dji LIGHTBRIDGE 2 User manual

LIGHTBRIDGE 2
User Manual
V1.0 2015.9

Disclaimer
Thank you for purchasing the Lightbridge 2. Users must comply with local radio
transmission laws and regulations when using this product. By using this product,
you hereby agree to this disclaimer and signify that you understand all points
completely. Please use this product in strict accordance with the manual and be sure
to pay attention to the warnings. When assembling and using this product, follow all
instructions carefully. SZ DJI TECHNOLOGY CO., LTD. and its affiliated companies
assume no liability for damage(s) or injuries incurred directly or indirectly from
improper use of this product.
DJI is the registered trademark of SZ DJI TECHNOLOGY CO., LTD. (abbreviated as
“DJI”). Names of products, brands, etc., appearing in this manual are trademarks or
registered trademarks of their respective owner companies. This product and manual
are copyrighted by DJI with all rights reserved. No part of this product or manual
shall be reproduced in any form without the prior written consent or authorization of
DJI.
This disclaimer is produced in various languages. In the event of divergence among
different versions, the Chinese version shall prevail when the product in question is
purchased in Mainland China, and the English version shall prevail when the product
in question is purchased in any other region.
Profile
A complete Lightbridge 2 comprises of an air system an d a Ground S ystem. I t is a
high definition video transmitter, and supports Ground System using the 2.4GHz
frequency band. As it is small, power efficient and highly sensitive, the Lightbridge 2
can be used for many activities. The air system must be attached to the aircraft and
the Ground System must be connected to a monitor to display the video and flight
controller information , you can also control your aircraft and gimbal with th e Ground
System.
When the Lightbridge 2 transmits the video and flight controller information, the air
system is the transmitter while the ground is the receiver. The air system pulls video
from the camera and flight controller information then modulates it and transmits to
t h e Ground System. Th e Ground System then receives the information, demodulates
it and sends it to a monitor or mobile device. The DJI GO app, available for mobile
devices is required for an ideal viewing experience.

When the Lightbridge 2 transmits the Ground S ystem signal, the Ground System
works as a transmitter while the air system works as a receiver. The Ground System
supports Dual Ground System mode. In Du al Con tr oller s mo de, th e “Mast er ”
Ground System operator controls the orientation of the aircraft, while the “Slave”
Ground System controls the movement of the gimbal and camera operation. A DJI
flight control system with DBUS port is required as the built in receiver only supports
the DJI DBUS protocol. The Ground S ystem includes Remote Controller module, th e
reserved buttons on the Ground System can be customized set by the flight
controller’s assistant for expansion use.

In the Box
Modules
Air System x 1 Ground System x 1
Air System Cables
Air System Antennas x 2
Air system communication signals
output.
DBUS Cable (A) x 1
Connect to A2/WooKong-M flight
control system DBUS port for
communication.
DBUS Cable (B) x 1
Connect to other DJI f light control
system DBUS port for communication.

GIMBAL Cable x 1
Connect to Air system GIMBAL port, one
end for DJI HD gimbal, the other for
CAN port.
AV Cable x 1
Connect camera’s AV output to Air
system AV port.
HDMI Cable x 1
Connect camera’s HDMI output to Air
system HDMI port..
USB Cable x 1
Upgrade the air system.
Ground System Cables
Charger x 1
Charging for the Ground System.
Comment [M1]: 电源线？

Mobile Device Holder x 1
Mounting your mobile device onto the
Ground System to launch the DJI GO
app.
Optional Packet（Purchased Separately）
Optional
Packet 1
HDMI Screen Holder
× 1
Optional
Packet 2
SDI Cable x 1
BNC Adapter x 1
Wire Holder x 1
Optional
Packet 3
Air System Antenna
Extension Cables x 2
Air System Antenna
Mounts x 2
Optional
Packet 4 CAN HUB x 1

1. Introduction
1.1 Air System Diagram
[1] H DMI IN Port
Connect to HDMI in put device. M aximum input rate is 1920*1080@60fps.
[2] AV Port
Connect to AV input device.
[3] GIMBAL PORT
Connect this port to the G7 port on a DJI HD gimbal or to other ports for the
fun ction s listed below:
a) Power su pply: (V+,V-) On-board battery (9~12V) power connection.
b) CAN-Bus: (L,H) Access to the flight controller information. For DJI HD gimbal
users, connect to the CAN-Bus port (for DJI A2/WooKong-M user, use the
CAN 2 Bus port) on the flight controller with a seperated CAN bus cable.
c) DVSB: (G-,+) DVSB video input f rom DJI HD gimbal.
[4] DBUS Port
Conn ect built in receiver in terf ace to DJI flight control system DBUS port, usually
located on the main controller labled X2. No other receiver requried when DBUS
is used.
[5] UPGRADE Port
Connect to PC to upgrade firmware of the air system using Lightbridge 2
Assistant.
[6] LINK Buttom
Press to link air system with Ground System.
[7] CONTROL Indicator
Indicate the communtation status of the air and Ground Systems.

Ind ica tor Description Instruction
Linking in progress.
Link button has been pressed. Air
system is attempting to link with
Ground System.
Signal detected but not linked. Link required.
Successful link. Normal.
No detected signal.
Power on Ground System. Ch eck
distance between ground and air
systems.
[8] VIDEO Indicator
Indicate video source transmission status.
Ind ica tor Description Instruction
AV/HDMI signal detected and
functioning normally. Normal.
AV/HDMI signal detected.
Transmission failed.
Air system or Ground System
power cycle required.
No video source detected
or not
supported by Lightbridge 2. Check camera and connection.
[9] Ventilation inlet
Do not obstruct ventilation fan outlet to ensure maximum cooling efficiency.
[10] Antenna Port

1.2 Ground System Diagram
[1] A ntenna s
Relays aircraft control and video signal.
[2] Mobile Device Holder Port
Mounting place for the mobile device holder.
[3] Control Stick
Controls the airc raf t mo vem en t.
[4] Return Home (RTH) Button
Press and hold the button to initiate Return to Home (RTH).
[5] Transformation Switch
Customizable button in flight controller assistant.
[6] Battery Level LEDs
Displays the current battery level.
[7] Sta tu s LED
Indicates the connection status of the air and Ground System.
Sta tus LED Alarm Ground System Sta tus
The Ground System is set as Master
but is not connected to the aircraft.
The Ground System is set as Master
and connected to the aircraft.
The Ground System is set as Slave but
is not connected to the aircraft.
The Ground System is set as S lave and

connected to the aircraft.
Ground System err or.
[8] Power Button
Used to power on or power off the Ground System.
[9] RTH LED
Circular LED around the RTH button displays RTH status.
RTH LED Sound Aircra ft Sta tus
Return-to-Home procedure is activated.
S end in g R etu rn-to-
Home command to the
aircraft.
Return-to-Home is in progress.
[10] Camera Settings Dial
Customizable button in flight controller assistant.
[11] Playback Button
Customizable button in flight controller assistant.
[12] Shutter B utton
Customizable button in flight controller assistant.
[13] Flight Mode Switch
Customizable switch in flight controller assistant to set manual, attitude or GPS
mode.

[14] Video Recording Button
Customizable button in flight controller assistant.
[15] Gimbal Dial
Customizable dial in flight controller assistant
[16] Re se rved Ex pa nsion Po r t
Reserved port.
[17] SDI Port
Connect a SDI display device.
[18] HDMI OUT Port
Connect an HD compatible monitor.
[19] USB Port
Connect to mobile device to laun ch DJI GO app, which displays the live camera
preview and OSD information.
[20] GPS Module
Used to pin point the location of the Ground System.
[21] Back Le ft Button
Customizable button in flight controller assistant.
[22] Power Port
Connect to a power source to charge the Ground System’s internal battery.
[23] Back Right Button
Customizable button in flight controller assistant.

2. Installation
This chapter introduces in detail the installation of air system and Ground System
before using Lightbridge 2.
2.1 Air System Antenna Installation
The air system communicates with the Ground System via antenn as. Follow the steps
below to install the antennas onto the air system.
1. Prepare two air system paddle antennas.
2. Insert antennas into positions shown below. Ensure they click into place.
3. Use foam tape to mount the air system to the XXX or other flat surfaces.
Install antennas before powering on air system.
Point antennas downward when in use and avoid obstructions to ensure
transmission quality.
Use only DJI antennas and install them correctly. Other antennas are
incompatible.
Do not apply excessive force on the antennas otherwise it may cause
damages to the antennas.
Do not unplug the antennas unless it is absolutely necessary. Use tweezers to
clamp on the metal part of the antennas when unplugging the antennas.
For use with large aircraft. Connect the antenna extension cable to the panel
antenna before attaching the air system.
Designed for DJI Spreading Wings aircraft. Place the panel antenna into the
antenna mount, and then place the antenna mount onto the landing gear of
t h e airc raft . Not e th at th e p anel antenna should be at a 90 degree angle to
the landing gear. Watch the video tutorials on the DJI website for more

details.
2.2 Ground System Connection with Display Device
SDI, HDMI and USB ports output video. Select one output base on your choice of
device.
Connect monitor with SDI support to SDI port, and mount the SDI screen holder
onto the Ground System.
Connect monitor with HDMI support to HDMI Out port on Ground System for
video.
Connect your mobile device to the Ground System with a USB cable, and mount
your mobile device safely with a mobile device holder. Use DJI GO App for video
and flight controller information.
The below example uses the USB port connection, prepare a slotted screwdriver.
Mounting the Mobile Device Holder:
1. Unfoldthe Mobile Device Holder○
1E A. Remove thescrew using theslotted screwdriver A○ 2E A.
2. Plug the Mobile Device Holder into the Ground System and tighten the screw lock.
3. Line up the hole onthe Mobile Device Holder with the metal loop on the Ground System.
Insert and tighten the screw.

Tilt the Mobile Device Holder to the desired position and then adjust the antenna
as shown. Follow the instructions below to connect your mobile device to the
Ground System:
1. Press the button on the side of the Mobile Device Holder to release the clamp.
2. Place your mobile device inside the clamp and adjust it to secure your mobile
device.
3. Connect your mobile device to the Ground System via a USB cable.
Do not attach SDI and HDMI devices to the Ground System simultaneously.
2.3 Connection Scenario
Lightbridge 2 offers several solutions to connect the gimbal to the flight controller.
This section provides information about the most commonly seen solutions and their
connection diagram. Follow the connection described in the solutions that best suits
your requirements.

2.3.1 Air System
DJI HD Gimbal + DJI Flight Controller
When using with DJI HD gimbal, you can select either single or dual video source. By
single video source mode, it means the air system relays either the gimbal camera
video or the FPV camera video signal to the Ground System. These two video sources
are mu tually exclusive under single video source mode. On the other hand, the air
system simultaneously relays gimbal camera and FPV camera video signal to the
Ground System. Note that user should manually select “HD gimbal” in vid eo
output source when they are conn ectin g DJI HD gimbal to the air system.
The connection steps are as follows:
1. Connect Gimbal Port on the air system with supplied Gimbal cable，then connect
it to G7 port on DJI HD gimbal and CAN 2 Bus port on the flight controller.
2. Connect HDMI /AV port on the air system to the FPV camera.
3. Connect DBUS port on air system to DBUS port (X2 port) on flight controller with
DBUS cable.
4. Refer to gimbal and flight controller manuals to complete connection.
The connection figure below take DJI HD gimbal and A2 fight controller as example:
FPV c amer a is n ot needed in single video source mode.

2.3.2 Ground System
Dual Ground Systems Mode
More than one Ground System can connect to the same aircraft in Dual Ground
System mode. In Dual Controllers mode, the Master Ground S ystem c ont ro ls th e
movement of the aircraft, while the Slave Ground System controls the movement of
the gimbal and camera. When multiple Slave Groun d Systems (max of 3 ) are connect
t o th e airc raft, only the first connected Slave Ground System is able to control the
gimbal, the remaining slave Ground System can view the live feed video f ro m th e
aircraft, but they cannot control the gimbal.

Use th e gimbal dial on the Ground System to control the pitch movement of the
camera in the single Ground System mode, however, you cannot pan the
camera.

3. Ground System
The Lightbridge 2 Ground System contains the remote controller, which integrates
video downlink and aircraft control. The Ground System o p erat es at 2.4 GHz with
maximu m transmission distance of 2km. The device features a nu mb er of s tand ard
and customizable buttons that allow users to quickly access certain aircraft functions,
such as taking and reviewing photos/videos, as well as controlling the gimbal motion.
It is powered by a 2S rechargeable battery.
ComplianceVersion: TheGround System is compliant with both CE and FCC
regulations.
Operating Mode: Control can be set to Mode 1, Mode 2.
Mode 1: The right stick ser ves as the throttle.
Mode 2: The left stick ser ves as the throttle.
Do not operate more than 3 aircrafts within in the same area (size equivalent to
a soccer field) to prevent transmission interference.
3.1 Ground System Operations
3.3.1 Powering On and Off the Ground System
The Lightbridge 2 Ground S ystem is powered by a 2S rechargeable battery with a
capacity of 6000mAh. The battery level is indicated by the Battery Level LEDs on the
front panel. Follow the steps below to power on/off you r Ground System:
1. When powered off, press the Power Button once and the Batter y Level LEDs will
display the current battery level.
2. Press and hold t to power on the Ground System.
3. The Ground System will beep when it powers on. The Status LED will blink green
(slave Ground System blinks solid purple) rapidly, indicating that the Ground
System is linking to the aircraft, then turn solid green when linking is completed.
4. Press twice and hold the power button to power off the Ground System.

3.3.2 Charging Ground System
Charge the Ground System via the provided charger.
3.3.3 Controlling Aircraft
This section explains how to use the various features of theGroun d System. Mode 2
(throttle stick on the left) is set by default.
Stick N eutral/mid point: Control sticks of the Ground System are placed at the
central position.
Move theStick: The control stick is pushed away fromthe central position.
Remote
Controller
(Mode 2)
Aircraft
( indi cate s no se direction) Remarks