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Thank you for purchasing our product, an ideal radio system for beginners or experienced users alike. Read this manual carefully before operation in order to ensure your safety, and the safety of others or the safe operation of your system. If you encounter any problem during use, refer to this manual first.
FS-lT4S Digital proportional radio control system 1. Safety 1.1 Safety Symbols Pay close attention to the following symbols and their meanings. Failure to follow these warnings could cause damage, injury or death. Danger • Not following these instructions may lead to serious injuries or death. Warning •...
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• Misuse of this product may lead to serious injury or death. To ensure the safety of you and your equipment, read this manual and follow the instructions. • Make sure the product is properly installed in your model. Failure to do so may result in serious injury.
Digital proportional radio control system 2 Introduction The FS-iT4S transmitter and iA4B receiver constitutes a 4-channel 2.4GHz AFHDS 2A digital proportional computerized R/C system, compatible with model cars and boats. This system may also be used with the FS-BS4 receiver to take advantage of Smart Vehicle Control, FLYSKY's state of the art gyro stabilization technology.
Never grip the transmitter antenna during operation. It significantly degrades the RF signal quality and strength and may cause loss of control. 2.3.2 Wheel and Trigger The FS-iT4S has two main control inputs, the wheel and trigger. • Wheel: Steering, used to control the direction of the model.
FS-lT4S Digital proportional radio control system 2.3.3 Status Indicator The status indicator is used to indicate the power and working status of the transmitter. • Off: the transmitter is powered off. • Blue light: the transmitter is on and working. •...
3 Getting Started Before operation, install the battery and connect the system as instructed below. 3.1 Transmitter Battery Installation Danger • Only use specified battery. Danger • Do not open, disassemble, or attempt to repair the battery. Danger • Do not crush/puncture the battery, or short the external contacts. Danger •...
FS-lT4S Digital proportional radio control system 3.2 Connecting the Receiver and Servos Connect the receiver and the servos as indicated below: CH4 Servo Switch (Optional) Battery CH3 Servo Steering Servo Throttle Servo Servos Receiver...
4. Operation Instructions After setting up, follow the instructions below to operate the system. 4.1 Power On Follow the steps below to turn on the system: Check the system and make sure that: • The battery is fully charged and installed properly. •...
FS-lT4S Digital proportional radio control system 4.3 Pre-use Check Before operation, perform the following steps to check the system: Check to make sure that all servos and motors are working as expected. Check operating distance: one operator holds the transmitter, and another one moves the model away from the transmitter.
5. Home Screen The home screen diplays useful information about your model, including sensors and function status etc. Model Name Transmitter Battery Status Receiver Signal Receiver Battery Status Sensor Feedback Break Mixing Throttle Curve Mixes A.B.S. Race Timer Engine Cut Sound Throttle Idle Steering Position...
FS-lT4S Digital proportional radio control system 6 Function Settings 6.1 Reverse Function The Reverse function is used to correct a servo or motor's direction in relation to the systems controls. For example, if a steering servo is mounted upside down in order to fit inside a model, when the system's steering wheel is turned, the servo will move in the oppisite direction.
6.3 Subtrim Function Subtrim changes the center point of the channel. For example, if a car's wheels are slightly out of alignment, the sub trim could be used to fix this. To set the subtrim function: Select the desired channel from the list. The setup menu for the selected channel displays. •...
FS-lT4S Digital proportional radio control system By changing the steering curve we can make the wheel more or less Exponential 100% sensitive in different areas of its range of movement, for example, reducing sensitivity at the middle for more control when making fine adjustments.
To set the steering speed: Select a parameter to change, [Turn speed] or [Return speed]. Move the wheel at the bottom of the screen left to reduce the value or right to increase the value. Select the icon to reset the function. Select the icon to return to the previous menu.
FS-lT4S Digital proportional radio control system 6.7 Throttle Neutral This function sets a "dead zone" for their throttle control, which means that the throttle will not function while still within the dead zone. You can set up the initial amount of throttle that will be applied when the throttle leaves the dead zone, for driving forward and backward separately.
6.9 Throttle Curve This function is used to add a curve to the throttle response so that the throttle will respond differently throughout its range of movement. This function must be activated and can be assigned to a button (See [Keys Function]). To set the throttle curve: Activate the function.
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FS-lT4S Digital proportional radio control system Break return Controls the reduction of braking during each pulse. If set to 60%, when the brakes are active, the system will remove 60% of the brakes strength on each pulse. Delay Determines how long it takes for the A.B.S. system to take effect. At a setting of 0%, the A.B.S.
Steering mix A.B.S. can be reduced automatically while turning. This function mixes braking and steering to turn reduce the A.B.S. or replace it with a constant braking pressure. To have constant braking unless turning simply move the wheel the opposite direction so that the header shows %E.
FS-lT4S Digital proportional radio control system 6.12 Throttle Middle This function changes the midpoint of the throttle, and could be used to correct the servo position. If the servo position is wrong, the model may move as soon as it's turned on. To change the midpoint, move the wheel at the bottom of the screen, and the current position will change in real time on the screen.
6.14 Engine Cut Throttle cut is used for fuel based models and is used to cut the throttle, essentially cutting the engine. To edit the settings move the wheel at the bottom of the screen. When active the function will stop the throttle droping below the defined point.
FS-lT4S Digital proportional radio control system 6.17 Mixes This function is used to create a mix between channels and control methods. For example, if you wish to light up the turn signal lamp which is assigned to CH3 whenever steering left or right, you can create a mix to do this.
6.19 Race Timer The race timer has 4 modes: • Up timer: Counts up. • Down timer: Counts down from the set time. • Lap timer: Keeps track time for each individual lap. • Lap memory: Records the results from the lap timer. Touch [Start] to start the timer, [Stop] to stop, and [Reset] to reset the function.
FS-lT4S Digital proportional radio control system 6.21 Models This function is used to change, reset, rename or copy model setups. The FS-iT4S can store up to 20 different models in the internal memory. [Select model]: Changes the current model. Touch [Select model] and then choose the name of the model to load it.
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Neutral Calibration Calibrates the S.V.C.functions neutral position.To calibrate touch this option and wait 2.5 seconds. Reverse: Nor/Rev Reverse is used to flip the direction of the correction. After installing the receiver,rotate the car to check if the wheels turn to the correct direction. If you rotate the car to the left, the wheels turn right, and if the you rotate the car to the right, the wheels turn left.
FS-lT4S Digital proportional radio control system 7 RX Setup 7.1 Bind with a receiver This function enables you to bind the receiver and transmitter so that no other system may interfere with your model's operation. To bind the transmitter with a receiver, refer to section " 4.2 Binding ". 7.2 RF std.: ADHDS 2A 2-way This menu allows you to change the communication protocol for the transmitter.
You can set the following parameters in this menu: • External sensor: Enables monitoring battery status using an external sensor. • Low voltage: Sets your battery's low voltage value which is 4.00V by default. • Alarm voltage: Sets the low voltage alarm limit. •...
FS-lT4S Digital proportional radio control system 7.7 Display Sensors This function is used to display information from the current active sensors. The type of sensor is displayed on the left hand side under [Type], the numerical ID of each sensor is in the middle under [ID] and the sensor's output is on the right under [Value].
7.8 Choose Sensors The main screen can display the value of up to 4 sensors. This function is used to select which sensors to display. Note: When no sensors are added the system will display TX/RX voltage and signal strength by default.
FS-lT4S Digital proportional radio control system 7.10 i-Bus Setup This function is used to assign a channel to the i-Bus connected servos. Follow the procedure below to set the i-Bus: Connecting the i-Bus module to your receiver and servos. Select [Steering], [Throttle], [Channel 3] or [Channel 4]. The system will display a prompt message "Press the corresponding servo interface button or touch cancel.".
8 Spectrum Analyzer The spectral analyzer function is used to monitor other devices that are emitting radio signals and at what frequency. This is useful as it is possible to find out if there is likely to be any interference from other sources such as WIFI.
FS-lT4S Digital proportional radio control system 9 System Settings 9.1 Blacklight Timeout: (Time) The blacklight timeout function controls how long the system will wait before turning off screens backlight. Note Backlight time can affect the battery life of your system, the longer the time, the shorter the battery will last.
This function is used to change between Metric and Imperial mesurement systems. 9.8 USB Function The system can be used with various computer based simulators via USB. To enable the simulator function select [FS-iT4S emulator] from the menu. • •...
FS-lT4S Digital proportional radio control system 10 Product Specification 10.1 Transmitter Specification (FS-iT4S) Channels Model type Car/Boat RF range 2.4055 ~ 2.475GHz Bandwidth 500 KHz Band RF power Less then 20 dBm 2.4G system AFHDS,AFHDS 2,AFHDS 2A Code type GFSK Sensitivity 1024 Low voltage alarm Yes (lower than 3.7V)
10.3 Sensor Specification 9.3.1 RPM Telemetry Module (Magnetic, FS-CPD01) Model type Car/Boat Speed range 0 to 60000 rpm Power input 4.0 to 6.5 V DC Weight 6.6 g Dimension (Length x Width x Height) 31 x 15 x 8.5 mm Color Black 10.3.2 RPM Telemetry Module (Optical, FS-CPD02)
FS-lT4S Digital proportional radio control system Appendix 1 FCC Statement This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to part 15 of theFCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.