FPV Model T20 User manual

2018.03
All-in-one Handheld Ground Station
User Manual v 1.1

INDEX
Disclaimer...................................................................................................................... 1
Cautions .........................................................................................................................1
Installation note...................................................................................................... 1
Precautions for Use...............................................................................................1
Introduction..................................................................................................................2
Check List....................................................................................................................... 2
Product Diagram........................................................................................................3
Receiver parts.........................................................................................................3
Remote Controller Parts...................................................................................... 4
Receiver Installation Guide.................................................................................5
Remote Controller Operation............................................................................. 6
Tablet Computer Power ON and OFF............................................................. 6
Remote Controller Power ON and OFF.......................................................... 6
Remote Controller Alarms...................................................................................6
Remote Controller & Receiver Indicators....................................................... 7
Remote Control Assistant Software Operation .......................................8
Channel monitoring and calibration................................................................. 8
Channel configuration.......................................................................................... 9
Receiver pairing and configuration.................................................................10
Remote Controller Charging............................................................................. 12
FAQ .................................................................................................................................13

1
Disclaimer
Thank you for choosing T20 All-in-one handheld ground station.（Hereinafter to
be referred as "T20". Please use T20 according to your local radio regulation. Please
read this statement carefully before use. It is deemed as acceptance of the entire
contents of this statement,once the product has been used.Please strictly follow
this instruction to install and use the product. FPV MODEL Co., Ltd. do not accept
any legal responsibility and will not be liable for any result or loss caused by
improper use, installation, assembly or modification of users.
Cautions
When using the T20, if it is not operated properly, the aircraft may cause a certain
degree of injury or damage to property. Please be careful when using it.
Installation note
1. Be sure to use the parts provided by FPV MODEL.
2. Be sure to install the antenna before power on to avoid damage to
the circuit.
3. Be sure the antenna is not obstructed by any obstacles and the end of the
antenna is facing down vertically and no bent, to avoid the communication
distance being shortened, or even unable to communicate.
4. Do not disassemble or modify the T20. If you encounter any problems that
cannot be solved during the installation process, please contact FPV MODEL
Co., Ltd. or your local distributor.
5. Be aware of the proper distance between all the electronic devices during
installation, to minimize the electromagnetic interference between the
devices.
Precautions for Use
1. Before use, please make sure all the connecting wires are tight and all parts
are working properly.
2. Please open the remote controller configuration software and check if the
channels are all working after booting.
3. Please check the surrounding environment to ensure that there are no
other device interference in 840MHz-930MHZ , otherwise T20 data
transmission performance may be seriously affected.
4. Check the remote controller battery before use. If the battery is lower than
25%, please recharge the remote controller. If the remote control is turned off,
the receiver will go out of control.

2
Introduction
T20 is a water, sun & shock resistant handheld ground station that integrates
an industrial-grade computer with Windows system and an integrated link remote
control system.The transmitter can be used to control the aircraft or a gimbal with
real-time flight and remote status feedback, route planning, and other functions. It
supports most of the ground station software on the market. The industrial grade
computer and military grade transmission links not only ensure the safety and
stability of the aircraft，but also are simple to operate and easy to carry.
Check List
Main modules
Accessories
Power cord
Power adapter
Receiver paring cable ×1
Charge the receiver
(DC:7.4-12V)
Charge the Remote
Controller
Used for frequency paring
and parameter setup
Receiver ×1
Remote Controller x 1

3
Product Diagram
Receiver parts
⑥ ⑦ ⑧
③
②
①
④ ⑤
①Power port
Use XT30 power plug，Supply voltage：7.4-12V
②S-BUS port
Use a servo wire to connect the S-BUS port of a flight controller or other equipment
③COM port
The COM port is TTL ,used to connect to the COM or API port of a flight controller
④Signal strength indicators
S1 S2 S3 are signal strength indicators
⑤Data transmission indicator
When the RXD light is on, it indicates that the receiver is receiving data.
When the TXD light is on, it indicates that the receiver is transmitting data.
⑥Set button
Used to configure the radio module or pair with the remote controller
⑦Radio configuration mode indicator
It indicates if the receiver is in configuration mode
⑧Link indicator
It indicates whether the link communication between the receiver and the remote controller is normal

4
Remote Controller Parts
⑤ ⑥ ⑦ ⑧ ⑩ ⑨
④
⑪③
②
⑫
①
①Remote Controller
Power Button
Turn on and off the
remote controller
②Computer Power Indicator
Indicates computer power and
whether it is charging
③Joystick
Control flight status (There are 4 joystick
modes that can be setup by built-in
software)
④Auxiliary Channel Switch
SA and SB are three-gear switches, LD
and RD are knobs
⑦TF Card Slot
Used to read TF cards
⑩SMA Jack
For antenna installation, SMA female
connector
⑤Computer Power Button
Turn on and off the tablet computer
⑧SIM Card Slot
Used to insert SIM cards to enable
internet access on tablet
⑪Type-C Charging Port
For charging the tablet.The maximum
charging current is 3A（The tablet and
remote controller can be used while
charging）
⑥Volume +/-
Increase or decrease the tablet volume
⑨Auxiliary Channel Switch
SA and SB are three-gear switches
⑫Standard USB2.0 Port
For external keyboard, mouse or other
devices.

5
Receiver Installation Guide
1. Tighten and install the antenna to the transmitter SMA connector.
2. Fix the transmitter to the plane, with the antenna vertically down
Figure 1-1
3. As shown in Figure 1-1, use the servo wire to connect the COM port and S-
BUS of the transmitter with other devices.
RX TX S S
Receiver GND GND FC or other
Receiver+
+FC or other
TX RX devices --devices
4. Connect to a stable 7.4-12V DC Power supply.Ensure that the supply
current is greater than 2A. When the L1 indicator flashes blue, it
indicates that the transmitter and remote controller are connected
properly.
The receiver power is 1W. Please keep the receiver antenna away from other electronic devices
(GPS, compass, etc.) to avoid interference with flight.
Make sure to install the antenna before power on,otherwise the radio module may get burned
Try to get the antenna upside down and avoid obstructed obstacles when using, to avoid
communication distance shortened and even unable to communicate.
Be sure to use the specified model of antenna to properly install and use. Do not use other
types of antenna
DC:7.4~12V
TXGNDRX
- + - +
TX GNDRX
Flight
Controller
S-BUS
COM
- +
- +

6
Remote Controller Operation
Tablet Computer Power ON and OFF
1. Press and hold the computer power button.When you see the startup
screen, release the button.
2. After the computer is turned on, you can check the remaining power
through the battery indicator in the lower right corner of the desktop. If
the power is less than 20%, please charge it in time.
3. After using the computer, you can shut down the computer through the
computer shutdown interface.
If the computer cannot be turn on by long-pressing the power
button, please use the charger to recharge the computer to
activate and try it again.
Remote Controller Power ON and OFF
Remote Controller Alarms
Low Battery：When the battery level is detected to be 3.65V，the remote controller
will sound a “beep-beep”alarm and the remote controller power indicator will flash
red. When the battery level is lower than 3.65v, the remote controller will
automatically shutdown for protection。
No operation for a long time：When the joysticks or the switches have no operations
on them for 10 minutes, the remote controller will sound a continuous “beep-beep”
alarm . At this time, if any joysticks or switches are toggled, the alarm sound will be
automatically shut down.
If the computer is not in use for a long time, please turn it off to avoid standby
power consumption.
Press and hold for 5
secs to turn it on/off

7
Remote Controller & Receiver Indicators
Remote Controller Indicators
Indicator
Prompt tone
Status
Solid Red
D-long tone
Boot Successfully
Red goes out
D-long tone
Shutdown Successfully
Flashing Red
D-D-D...
Low Battery Alarm
Receiver Indicators
Indicators
Status
L1
Flashing Blue
The receiver and remote controller are
connected successfully
L2
Solid Blue
The receiver is currently in configuration
mode and has no power output
RXD
Flashing Yellow
The receiver is receiving data
TXD
Flashing Yellow
The receiver is receiving data
S 1 、 S 2 、 S 3
Flashing Red
High signal quality
S 2、 S 3
Flashing Red
Medium signal quality
S3
Flashing Red
Low signal quality

8
Remote Control Assistant Software Operation
Channel monitoring and calibration
Figure 1-2
1. Turn on the remote controller and computer power button, and then
open tablet remote control assistant software.
2. Figure 1-2 is the monitor interface. Toggle each switch or joystick to
check if they are working.
3. Click on “CALIB”button. Then toggle the joysticks and rotate the knobs
maximally in 10 seconds.Now the software will collect the maximum value of
each joystick or knob and perform calibration (the factory has already
calibrated before delivery)