RadioLink T8S(BT) User manual

T8S(BT)
User Manual
8-Channel Remote Controller
APP Parameter Setting via Bluetooth Connection on the phone
APP Parameter Setting via USB Cable Connection on the computer
Compatible with Fixed-wings/Gliders/Multirotors/Cars/Boats/Robots
CE FCC RoHS

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Contents
Chapter 1 Introduction..................................................................................................................................................3
1.1 Safety precautions................................................................................................................................................... 3
1.2 T8S+R8EF introduction .......................................................................................................................................... 4
1.2.1 Specifications ........................................................................................................................................ 4
1.2.2 Packing List ............................................................................................................................................ 5
1.2.3 Transmitter Overview ......................................................................................................................... 5
1.2.4 Transmitter Battery ..............................................................................................................................6
1.3 R8EF Receiver .............................................................................................................................................................6
1.3.1 Receiver Mode and Signal Switch..................................................................................................6
1.3.2 Guide of Receiver Install ....................................................................................................................8
1.3.3 Binding.....................................................................................................................................................8
Chapter 2 Parameters Setup APP..............................................................................................................................9
2.1 Mobile phone APP ...................................................................................................................................................9
2.1.1 Mobile Phone APP Installation ....................................................................................................... 9
2.1.2 Mobile Phone APP Connection ...................................................................................................... 9
2.1.3 Mobile Phone APP Parameters Setup Menu ...........................................................................10
2.2 Software APP on Computer ...............................................................................................................................12
2.2.1 Software APP Installation on Computer ................................................................................... 12
2.2.2 Software APP Connection on Computer.................................................................................. 12
Chapter 3 Function Setup Menu on APP ............................................................................................................. 14
3.1 SERVO Menu ........................................................................................................................................................... 14
3.2 BASIC Menu.............................................................................................................................................................15
3.2.1 REVERSE ................................................................................................................................................15
3.2.2 SUB-TRIM .............................................................................................................................................16
3.2.3 END POINT ADJUSTMENT (EPA)..................................................................................................17
3.2.4 FAIL SAFE (F/S) ....................................................................................................................................17
3.2.5 DELAY.....................................................................................................................................................19
3.3 ADVANCED Menu ..................................................................................................................................................19
3.3.1 D/R (Dual Rate).................................................................................................................................. 19
3.3.2 ATTITUDE ..............................................................................................................................................21
3.3.3 ELEVON ................................................................................................................................................. 22
3.3.4 V-TAIL.................................................................................................................................................... 23
3.4 PROG.MIX Menu .................................................................................................................................................... 24
3.4.1 PROG.MIX .............................................................................................................................................24

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3.4.2 TH/CURE ............................................................................................................................................... 26
3.4.3 DR/CURE ...............................................................................................................................................27
3.4.4 SYSTEM Menu..................................................................................................................................................... 27
3.4.4.1 AUX.CH .............................................................................................................................................. 27
3.4.4.2 ALARM ...............................................................................................................................................28
3.4.4.3 Version MODE.................................................................................................................................29
3.4.4.4 RESET..................................................................................................................................................31
Chapter 4 Firmware Upgrade ...................................................................................................................................32
4.1 Firmware Version ................................................................................................................................................... 32
4.2 Firmware Upgrade Steps.....................................................................................................................................32
Chapter 5 T8S Joystick Calibration .........................................................................................................................33
Technical Support ......................................................................................................................................................... 34

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Chapter 1 Introduction
1.1 Safety precautions
1) Do not use the remote controller in the rain! Avoid moisture entering the transmitter. If it is
unavoidable to use this product in humid weather (such as competitions), please cover your
remote controller and receiver with a waterproof cloth, and do not fly if there is lightning.
2) Do not use it in rainy and snowy weather. This weather environment will interfere with the
remote controller equipment, resulting in loss of control and accidents!
3) Do not use this equipment in crowded areas and places prohibited by national laws and
regulations!
4) Do not allow children (Less than 14 years old) to touch this product. This product is not a toy.
Please be careful when operating in scenes where children are present.
5) Please strictly abide by local laws and regulations when flying to ensure safe flight!
6) Make sure the throttle stick and trim button are set at the lowest end before turning on, then
turn on the power button and check whether the power supply is sufficient, then turn on the
receiver!
7) Check whether the various actions of servo are consistent with the direction of the
corresponding joystick before operating the model. If they are inconsistent, please adjust
before using!
8) Please turn off the receiver and controlled equipment before stopping use, and then turn off
the power supply of the transmitter. If the operation is reversed, it may cause loss of control
and cause an accident!
9) T8S transmitter has a built-in lithium battery with an operating voltage of 3.7V~4.2V. Please do
not use a battery outside this voltage range when replacing the battery by yourself.
10) The T8S is compatible with R8EF/R8F/ R8FM/R8XM/R8SM/R8FG/R7FG/R6FG/R6F/R4FGM/
R4F receivers. Other brands of receivers cannot be used.
11) Please refer to the website to modify the throttle hand and return to the center position
joystick: https://www.youtube.com/watch?v=b-97TUi3_Rw
12) Please strictly follow the precautions and instructions to use this product. The loss caused by
misuse of this product shall be borne by the user.

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1.2 T8S+R8EF introduction
1.2.1 Specifications
T8S Transmitter
Size
162.5*95.5*57mm(6.4 “*3.76“* 2.24”)
Weight ((with R8EF))
142g(5.0oz)
Channel Quantity
8 channels
Control Range
2000 meters in the air, 500 meters on the ground (actual distance depends on the environment)
Operating Current
<150(±5)mA
Operating Voltage
3.7- 4.2V
Output Frequency
2.4GHz ISM band (2400MHz~2483.5MHz)
Modulation Mode
GFSK
Channel Bandwidth
400KHZ
Channel Pacing
1200KHz
Spread Spectrum Mode
FHSS 67 channels pseudo-random frequency hopping
Adjacent Channel
Rejection
>36dBM
Transmitter Power
<100mW (20dBM)
Reception Sensitivity
-104dBM
Transmission Rate
38kbps
PWM Output Range
1.0ms~2.0ms
Section precision
4096, 0.5us per section
Cycle
15ms/per frame
Compatible receivers
R8EF(Standard), R8SM, R8FM, R8XM, R8F, R8FG, R7FG, R6FG, R6F, R4FGM, R4F
R8EF Receiver
Size
41.5*21.5*11.5mm (1.63” *0.85” *0.45”)
Weight：
7g
Antenna length
210mm (8.26”)
Channel Quantity
8 channels
Control distance
2000 meters in the air, 500 meters on the ground (actual distance depends on the environment)
Operating Current
38-45mA@5V
Operating Voltage
3-15V DC
Signals Output
PWM(red LED) and PWM&SBUS&PPM(blue/purple LED)
Section Precision
4096, 0.25us per section
Compatible transmitter
T8FB/T8S/RC8X/RC6GS V3/RC4GS V3/RC6GS V2/RC4GS V2/RC6GS/RC4GS

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1.2.2 Packing List
T8S Transmitter *1 R8EF Receiver *1 USB Cable(Update&Charge) *1
Throttle Return Accessories *1 User Manual *1 Packing Box *1
1.2.3 Transmitter Overview
T8S (Mode 2) is shown as below
T8S Buttons and Switches:
Power button: Long press to turn on/off T8S.
Throttle/Rudder/Aileron/Elevator Stick: The default Channel 1 to Channel 4 controls the roll,
pitch, throttle and yaw of the aircraft.

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Trimmer buttons: T8S has 4 groups trimmer buttons (two for each group), which can trim roll,
pitch, throttle and yaw respectively. The trimmer buttons are used to quickly adjust the model
during flight.
Three-way switch: CH7 (SWA) and CH5 (SWB) are three-way switches, which can be assigned to
the auxiliary channel through APP to control the equipment connected to this channel. (Note: If
you have purchased RadioLink RTF fixed wing or racing drone that come with a T8S transmitter,
the three-way switches control the switching of the flight mode by default.)
Knob switch: CH8 (VRA). This switch can be set by parameter setting APP according to your
needs, and is mostly used for Pan/Tilt/Zoom adjustment.
Push button: CH6 (VRB). This switch can be set by parameter setting APP according to your
needs, and it is mostly used to control camera shutter.
1.2.4 Transmitter Battery
The built-in battery of T8S is a 1S LiPo battery. When the voltage is low, the green indicator will
flash with a DD warning sound. Make sure to charge the battery in time to avoid the possible
damage by over discharge.
It is easy to charge T8S. You only need to connect T8S to the computer with the USB cable
comes with T8S. When the first LED indicator light on T8S turns from red to blue, T8S is fully
charged.
1.3 R8EF Receiver
1.3.1 Receiver Mode and Signal Switch
The standard receiver packed with T8S is R8EF, 8-channel receiver with PWM and SBUS/PPM
signal output supported.
Signal Working Mode
(1) PWM Working Mode: Receiver indicator is RED with all 8 channels output PWM signal.

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(2) SBUS/PPM Working Mode
Receiver indicator is Blue(Purple) with 8 channels output in total. Channel 1 is SBUS signal,
channel 2 PPM signal and channel 3 to 8 PWM signal.
Note: Fixed wing equipped with flight controller is taken as an example.

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Signal Switch between SBUS&PPM and PWM
Short press the binding button on the receiver twice within 1 second to switch the SBUS/PPM
signal to PWM signal.
1.3.2 Guide of Receiver Install
(1) Please test RSSI (Received Signal Strength Indicator) before operating models. For methods
on how to test it, please refer to https://www.radiolink.com/newsinfo/477894.html
(2) If the antenna of the receiver is damaged, replace it with a new antenna or receiver in time.
(3) Keep antennas as straight as possible, or the effective control range will reduce. PS: Generally,
the receiver’s antenna is longer than the body of drone, but also shouldn't break or shrink the
antenna into it.
(4) Big models may contain metal parts that influence signal emission. In this case, antennas
should be positioned at both sides of the model to ensure the best signal status in all
circumstances.
(5) Antennas should be kept away from metal conductor and carbon fiber at least half inch away
and no over bending.
(6) Keep antennas away from motor, ESC or other possible interference sources.
(7) Receiver contains some electronic components of high-precision. Be careful to avoid strong
vibration and high temperature.
(8) Special vibration-proof material for R/C like foam or rubber cloth is used to pack to protect
receiver. Keeping the receiver in a well-sealed plastic bag can avoid humidity and dust, which
would possibly make the receiver out of control. Putting the receiver into a plastic bag can
also prevent fuel and residue from entering.
1.3.3 Binding
T8S and R8EF have already finished binding by default. If you purchase a new compatible
receiver separately, you need to bind the receiver to the transmitter. Each receiver has an
individual ID code. When the binding is done, the ID code will be stored in the transmitter and
there's no need to rebind.
Binding steps:
① Put the transmitter and the receiver close to each other in parallel (about 50 centimeters).
② Push the Power Switch to power on T8S.
③ Power on the R8EF, the LED of R8EF will start flashing slowly.
④ There is a binding button(ID SET) on the side of receiver. Press the button until the LED
flashing quickly and release, binding process is ongoing.
⑤ When the LED stops flashing and turns to always on, binding is complete. If not succeed,
the LED will keep flashing slowly to notify, repeat the above steps.
Check the binding tutorial here: https://www.youtube.com/watch?v=D2cwvloIMDM

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Chapter 2 Parameters Setup APP
2.1 Mobile phone APP
2.1.1 Mobile Phone APP Installation
Android APP:
Visit https://www.radiolink.com/t8s_apps to download the android APP to setup T8S
parameters by Bluetooth connection.
NOTE: The APP will not collect any user's information,
you can even use this APP without Internet connecting. The
APP asked for Location Permission only used for connecting
and telemetry function.
Apple APP: Search Radiolink in Apple store (See picture
on the right) and then click it to download.
2.1.2 Mobile Phone APP Connection
Connection of both Android APP and Apple APP to T8S are the same as below:
① When the installation of parameter setup APP is complete, press the power button to turn
on T8S.
② Click to enter the APP, a message will pop out to ask for permission to turn on the
Bluetooth function.
③ Click CONNECT on the top left of interface, a list of devices will pop out for selection.
④ Select RadioLink device, the two LED indicators at rightmost will flash with DD sounds.