Foxtech Bi-Focus User manual

User Manual
V1.0
10X Optical Zoom 320x240 IR Thermal
Camera with 2-axis Gimbal
Bi-Focus
2019.08

Bi-Focus User Manual
©2019 FOXTECH All Rights Reserved 2
Warning
Device Introduction
Main Components and Functions
Environment and Conditions of Working
Technical Characteristics
Installment and Debugging
Install Screw
Electrical Interface
Communication
Communication
Pseudo-color Pattern Switching
Gimbal Debbuging/Control
Use and Operation
Failure Analysis and Elimination
Maintenance
Transportation and Storage
3
4
5
5
5
7
7
7
10
13
16
20
21
22
23
24
Content

Bi-Focus User Manual
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Warning
Please read the instruction carefully before install and use this product, and keep it in a safe place.
Observe all warning operating instructions, and follow all operating instructions;
Do not allow the supply voltage to exceed the specified range;
Do not allow the the use environment beyond the environment condition of the pod;
Do not make the camera's thermal imager to look directly at high-intensity radiation sources such as the
sun, carbon dioxide lasers, and electric welders（including power on or off（, in order to avoid damage to the
focal plane of pod;
All loads(include SSD) are protected from static electricity during use to avoid damage;
Pay attention to the protection of the internal interconnection and the external connection cable;
There are no user-serviceable parts inside the pod. Do not open the pod without the company permission,
or the consequences are the responsibility of the user;
Disconnect the power supply before cleaning the pod. Do not use chemical solvents, thinners, or spray
cleaners.
（· Ensure that the interface definition on the airborne side is correct;
（· Ensure that the supply voltage in the given range（3S~6S.

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Device Introduction
Foxtech Bi-Focus is a 2-axis high stabilized gimbal with a 10X optical zoom camera and a 320x240 thermal
camera. Foxtech Bi-Focus has a small volume and light weight. The high precision 2-axis gimbal is based
on FOC technology, which features high stability, accuracy and sensitivity.
Foxtech Bi-Focus is a functional camera and gimbal, supports 1080P 60fps video output, and 4 mega
effective pixels. The resolution of thermal camera is 320*240. Dual sensors help pilot easily collect visible
and thermal imaging data of the same picture in one flight. Bi-Focus supports dual-channel synchronous
video recording, which is convenient for subsequent video analysis.
Bi-Focus supports multiple thermal imaging pseudo-color pattern, can switch from one pattern to another,
and has temperature measuring and picture-in-picture function. Foxtech Bi-Focus supports Sbus control,
supports TF card storage.
The structure of the gimbal:
Bi-Focus can be applied in fire fighting and searching, rescue,power line inspection, crop protection etc.

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Main Components and Functions
Environment and Conditions of Working
Technical Characteristics
The device consists of a thermal movement, a zoom visible light movement, and a stabilized gimbal. The
visible and thermal video streams are stored separately in the visible light movement, and synthesize
multiple picture-in-picture modes according to external control commands and output by HDMI.
TF Card
Optical Zoom
Thermal
Module
HDMI output
picture-in-picture
HDMI
ISP Processing,
Local recording,
Image Synthesis ISP
· Working Environment（-10（ to +45（ / 20% to 80% RH
· Storage environment（-20（ to +60（ / 20% to 95% RH
· Transportation: After finish the package, the pod can meet the requirements of air, road, railway and
waterway transportation.
Visible camera parameters:
- SENSOR Pixel（400 million pixels
- Focal Length（f= 4.9to49 mm ±5%
- Field of view（FOV（（
（D : WIDE 66.6（±5% TELE 7.2（±5%
（H : WIDE 53.2（±5% TELE 5.3（±5%
（V : WIDE 399.8（±5% TELE 4.2（±5%
- Zoom: 10X electro-optical zoom
- Zoom mode: motorized zoom and continuously adjustable
- Image and video storage format（
Image（jpeg format（Can choose multiple pixels
Video（mp4 format（Thermal infrared camera parameters can choose 1080P or 720P

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- Detector resolution（320*240
- Pixel spacing（12μ m
- Wavelength range（8（14μm
- Type: Uncooled focal plane microbolometer
- Thermal sensitivity NETD（ -5（ to 150（ （5% precision（
- Field of view: 6.5mm lens, angle: 34.4 x 25.8
- Refresh frequency（9Hz
- Image and video storage（
（image（320*240
（video（320*240
Measurement function: center point, highest temperature display temperature function; Over-temperature
alarm
- Storage capacity: 128G TF card; calss6 and above
- Image output interface（ HDMI 1080P 60FPS Picture-in-picture output
- Video recording（ 1080P 30FPS H.264 compression
- Pitch angle range（-20°to +180°
- Yaw angle range（-150 °to +150 °Promise rotation
- Control Precision（
Pitch direction（±0.02°
horizontal direction（±0.03°
- Control Method（
（SBUS control
（IBUS control
- UART Command control system boot preparation time（21S
- Power supply（3S/6S
- Power consumption（10W
- Weight（480±10 gram
- Volume（108mm*100mm*125mm
L108
W100

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Installment and Debugging
Install Screw
Electrical Interface
The external electrical interface of the device has four channels, which are power interface, communication
interface (including SBUS communication and serial communication), HDMI video interface, and TF card
interface. The video interface uses the HDMI type_C interface. The USB interface is used for debugging the
pan/tilt stabilization parameters.

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Serial Number
1
2
3
4
5
6
7
8
Model
8PIN socket
Types of interface
power interface
power interface
communication interface
communication interface
communication interface
communication interface
communication interface
communication interface
Interface Definition
GND
5V
S/I BUS
TXD4
RXD3
TXD3
DA-
DA+
Features
GND
+5V output
SBUS channels
UART4_Tx(Reserved)
Serial port reception
Serial port transmission
Reserved
Reserved
high（0x06A4(1700) middle（0x03E8(1000) low（0x012C (300)
YAW
PITCH
middle to low（yaw right
middle to high（yaw right
high and low to middle（yaw stop
middle to low（pitch down
ZOOM
FOCUS
RECORD（CAPTURE
Picture_In_ Picture（Pseudo_Color
Gimbal Mode
Digital ZOOM（Some models support（
middle to high（pitch up
high and low to middle（pitch stop
middle to low（ ZOOM -
middle to high（ ZOOM +
high and low to middle（ZOOM stop
middle to low（ FOCUS +
middle to high（ FOCUS -
high and low to middle（ZOOM stop
middle to low（photograph
middle to high（video state switching
middle to low（thermal imager pseudo-color switching
middle to high（PIP switching
middle to low（switch between high speed mode and low speed mode
middle to high（switch between follow mode and lock mode
middle to low（ ZOOM +
middle to high（ ZOOM -
high and low to middle（ZOOM stop

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Channel configuration software instructions:
Setting com port（
Baud rate（115200 Data Bit（8 Stop Bit（0 Parity（No
1、 Select the serial port number
2、 Configure this option
according to the setting
Serial port status indicator (off)
3、Open serial port
Click the “Receive” button to get the current channel configuration status.
Click the “Send” button to write the configuration after manually setting the channel configuration.
Serial port
status
indicator
(on)）
Close the serial
port
Send data button
Current
status
display area
Data collection button

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Channel data error
gives
corresponding
prompt
Communication
Serial Communication
Frame Structure
12 to 27 char
Frame Header
(3char)
#TP
Address Bit
(2char)
U/M/D/I/E/P
Data Length
(1char)
L
controlposition
(1char)
w/r
Identificationposition
(3char)
X1X2X3
Data1 (char)
D1
...
(char)
...
Data L
(char)
DL
Check position
(2char)
CRC
Frame Header（
#TP（Fixed-length command（The data length is 2
#tp（ Variable-length command（The data length is determined by the length bit.
Address bit（
Source address（ U: Uart command M: Lens related commands; D: System and image related commands;
I: algorithm-related commands; E: thermal infrared related commands; P: pan/tilt related commands..
Target: U: Uart command M: lens related command; D: system and image related commands;
Control position: r -- > query w -- > control data: according to the length
Identity bit: identity function

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Data: Data bits, according to Data length;
CRC: convert the rest into HEX, add up, and convert the result into asc-ii, except for the beginning. Two
bytes with the highest order in front.
Serial port configuration: baud rate: 115200, data bit: 8, stop bit: 1, check bit: none
The serial port controls of the ground terminal as follows:
1. Gimbal angle control, camera control and camera parameter configuration.
2. Gimbal angle control and camera control.
3.（Gimbal speed control and camera control.

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Infrared Remote Control
Gimbal movement supports infrared remote control.
Infrared Remote Control Button Function
Zoom+ Focus -
Focus +
Thermal Zoom-
Down
Thermal Zoom+
Right
Up
MenuPseudo-color switching
Night mode
Left
Video
photograph
Picture-in-picture switching

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Communication
Boot image screen
The HDMI output boot screen after the pod is powered on.
The boot screen duration no longer than 21s, during which the PTZ and camera are initialized. After the
initialization, the image is displayed: visible light + thermal infrared
Thermal image
Visible light image

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PIP mode switching
The device supports 5 modes（
1（Single Visible light（
2（Visible light（larger one（+ Thermal image（small one（（
3（Single thermal infrared（
4（Thermal infrared（larger one（+ Visible light（small one（（
5（Visible light（left（+ Thermal infrared（right（Split screen display（
Visible light
Visible light + Thermal infrared

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Thermal infrared
Thermal infrared + Visible light
Split screen display

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Pseudo-color Pattern Switching
Pseudo color mode supports 10 color switching, which can be controlled by SBUS, serial port and infrared
control switching, some mode displays in Figure:

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Visible Light Zoom
Visible light camera supports 10X optical zoom,when zooming,the multiple is displayed in the lower right
corner and can be controlled by the zoom command, as shown in Figure
Visible Light Focusing
In some special application scenarios (such as power line inspection), when the target object is too small, it
will causes the target to be out of focus in the visible light image. At this time, the visible light manual focus
adjustment command can be performed to make the target object focus properly.
Visible light and thermal imaging photo taking and capturing.
When there is a TF card, the camera can be photographed by sending a photographing command, or the
photographing command can be sent during the recording, and the photographing pixels can be 400W,
800W, 1300W or 1600W,the photo-taking time is saved to the photo properties.
Memory card is not hot-swappable.

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Video Recording
When there is a TF card, video recording can be performed by sending a video command.
video resolution 1080P and 720P are optional. Infrared and visible light can be recorded simultaneously,
sent again, stop recording, and the recording time is displayed in the middle of the right side.

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Gimbal Debbuging/Control
Gimbal back to center
The gimbal can be set to the centering state by the control command, and the gimbal will be in this state
and keep the camera facing the front of the head.
Gimbal Yaw Locking
The gimbal can be set to work in YAW lock mode by controlling, in which the gimbal will not rotate with the
rotation of the aircraft's heading.
Gimbal YAW Following
The gimbal can be set to work in YAW following mode by controlling.In this mode the gimbal is possible to
maintain a constant angle between the heading and the fuselage and to rotate following the aircraft heading.
Attitude Control
The gimbal can be controlled by serial command, IBUS, SBUS moving at a fixed angular rate
in the heading and pitch directions.
Speed Control
The gimbal has two modes: high speed mode and low speed mode. When the gimbal rotated, the speed is
adaptive based on the current speed mode and the visible light camera multiple:
multiple/speed mode（（
1x
2x
4x
low speed（
10r/s
6r/s
4r/s
middle speed（（（（
15r/s
9r/s
6r/s
high speed（（（
20r/s
12r/s
8r/s
The data are used to illustrate the speed control logic and not the actual speed.
Automatic Drift Correction
When used for a period of time or when the ambient temperature changes drastically
gimbal will have large drift that causes screen tilt or manual control inconvenience, and requires an
automatic drift correction command to calibrate.