FS-ST8 user manual

Operation instructions for MENU, EXIT and Scroll Wheel.

MENU button

• In main menu, press MENU in the main page to enter the function menu.
• In main menu, press and hold MENU for seconds to enter MONITOR menu.

EXIT button

• Press EXIT to return to the previous menu. In the editing status, you can press EXIT to save and exit the editing status.
• Except the transmitter is in firmware updating process or in main menu status, press and hold EXIT for 2S to return to the main menu.
• In main menu, press and hold EXIT for 3S to lock the screen. In the screen lock status, there will be no response if you press any buttons. To unlock the screen, press and hold EXIT for 3S.

Scroll Wheel

• In the selected state, press Scroll wheel to enter the next level menu.
• To set turn on/off a function, you select it by scrolling Scroll Wheel and press Scroll wheel for switching between ON and OFF.
• In the function item editing status, press Scroll wheel to determine the editing result, and press EXIT to save and exit the editing status.
• In the case of no next-level menu, press Scroll wheel after the selection by scrolling Scroll Wheel, to enter the editing status. In this case, you can scroll the Scroll wheel left and right for editing.
• In the detail menu and if no item is in the editing status, you can press Scroll wheel for 2S to reset all data in the current menu. All data will be reset to the default values. The system prompts a reminder to reset. To continue the reset, select YES. To cancel, select NO.
• In the menu, scroll Scroll wheel to select an item. In the function item editing status, scroll Scroll wheel to select an item/adjust a parameter.

The system can be connected via a USB Type-C cable to a computer for use as a HID device. This function is automatically activated when connected to a computer and will be recognized as a standard HID controller.

The transmitter can output up to 12 channels, and the number of channels can be set according to the actual application. For the setting steps, refer to 6.1.7 TX SET - SWITCH SETTINGS.

The upgraded version has added 4 new switches: VRC, VRD, KEY1 and KEY2. The switches are off in default. If you want to use these switches, you need to set to ON via Main menu > TX SET - SWITCH SETTINGS. For the setting steps, refer to 6.1.7 TX SET - SWITCH SETTINGS.

The status LED indicates the power supply state of the receiver and its working state.

All the interfaces are 2.54 mm standard pins for connecting the receiver to each terminal part of the model. Please follow the direction according to the direction on the receiver.

Note: This function was updated in version 1.0.57.

The MODEL menu is used for model management. It includes seven options: MODEL SELECT, MODEL NAME, MODEL COMB., SELECT TYPE, MODEL COPY, MODEL RESET and RACE MODE.

MODEL SELECT

The transmitter can save up to 10 sets of model data, and you can call out one set of model data at any time and use it as needed.

MODEL NAME

The name of the model you select can be edited and changed.

MODEL COMB.

Allows the selection of multiple model combinations and the presetting of a switch. When the selected model combination includes the current model, the preset switch can be used to switch between models.

Only specific position switches can be assigned, and only the assigned positions are effective.

For example, if the switch position is assigned to "up", the model can be switched only when the switch is moved to the "up" position. Other positions (e.g., "down" or "middle") will have no effect.

SELECT TYPE

To provide a total of 9 different types of models, and it covers most of kinds of the models.

MODEL COPY

If you have a new model that is the same or similar to the model you used before, you can use this function to make a copy for quick setting.

MODEL RESET

It means that this function will reset all the set values of the model parameters and restore the factory settings.

RACE MODE

This function is used to quickly disable the LOW SIGNAL ALARM and TELEMETRY ALARM, effectively turning off the related signal alarms. It is recommended to use this function to disable the low signal alarm and telemetry loss alarm before the race; after the race, you can decide whether to re-enable these two alarm functions based on the actual usage scenario.

Function settings:

1. In the MODEL menu, select the function by scrolling Scroll Wheel and press Scroll Wheel to enter the corresponding next-level menu.
2. In the MODEL SELECT menu, scroll Scroll Wheel to select an appropriate model and press Scroll Wheel to confirm, then press EXIT to save.
3. In MODEL NAME menu, scroll Scroll Wheel to select an appropriate alphabet or number. Use DELETE to delete the related characters. To save the settings by pressing Scroll Wheel while SAVE is in selecting state. It supports up to 8 characters.

1. If [MODEL COMB.] is selected: Choose STATUS > ON. Select SWITCH ASS, then press the scroll wheel to enter the setup menu. In the menu, select the desired control or toggle the corresponding physical control. After selecting MOD SELECT, proceed to the next menu level: Choose the models to be combined. The system will display a confirmation prompt. Select OK to confirm.
2. In SELECT TYPE menu, scroll Scroll Wheel to select an appropriate type and press Scroll Wheel to finish.
3. In MODEL COPY menu, scroll Scroll Wheel to select the model for FROM and TO respectively, then select COPY and press Scroll Wheel, a pop-up menu come along with it. Select OK and press Scroll Wheel to confirm. Press EXIT to save and exit.
4. For MODEL RESET, select OK and press Scroll Wheel to confirm in the pop-up menu appeared.
5. If you select RACE MODE and the system will pop up a message, select OK and press Scroll Wheel to close the pop-up window, meaning the relevant alarms have been disabled. If you select RACE MODE again, a pop-up message will indicate that the system is already in race mode; select OK and press Scroll Wheel to close the pop-up window.

Note: When the RF system is enabled:

• If the receiver is not communicating with the transmitter and RACE MODE is selected, the RF STANDARD will automatically adjust to 1WAY, and the RF SYSTEM will switch to ROUTINE.
• If the receiver is in 1way communication with the transmitter and RACE MODE is selected, the RF SYSTEM will switch to ROUTINE.

Note: This function was updated in version 1.0.57.

This function is designed for beginners. The trainer can make instruction and training for the students under supervision, to avoid the risks caused by beginners in the learning process.

It features TRAINER mode and STUDENT mode, and a switch can be set to enable or disable the trainer function. When the switch is set to ON, the trainer controls the aircraft, and the student controls the aircraft when the switch is set to OFF.

For example, if the trainer and the student use two FS-ST8 transmitters for teaching and training. After connecting the two transmitters via the FlySky's trainer cable, set the MODE of the trainer transmitter to TRAINER, as well as setting a control switch. Then set the MODE of the student transmitter to STUDENT.

The FS-ST8 can also realize the trainer function with the FS-WTM01 wireless trainer unit and other FlySky transmitters, such as PL18 transmitter. Set the transmitter which has physically connected to the FS-WTM01 as the trainer transmitter.

Function settings:

1. Select TRAINER and press Scroll Wheel to enter.
2. Set ON or OFF to turn on or turn off using Scroll Wheel.
3. Set a switch. In the menu, select a switch and its corresponding position to finish, or you can toggle the corresponding physical switch on the transmitter to finish.

Notes:

1. Use a trainer cable to connect the two transmitters which are for the trainer and the student. Make sure the trainer cable connected well before using this function.
2. VALID will be displayed on the top of this menu, when the switch assigned is set to on and the signal of the student transmitter is input. Namely, the trainer function is valid; otherwise, the function is invalid.

Note: This function was updated in version 1.0.57.

This function is used to monitor the throttle position.

You can set the trigger value and activation status for the alarm. When the throttle stick crosses the set position, the system will emit a beep sound as an alarm.

Function settings:

1. Select THROTTLE ALARM and press Scroll Wheel to enter.
2. Set THROTTLE ALARM: OFF. It can be toggled between ON and OFF.
3. Select TRIGGER VALUE, scroll the wheel to set the appropriate value, and press the wheel to confirm.

Note: If the alarm sound is turned off (SYSTEM SETTING > SOUND/VOLUME), the alarm sound will not be triggered even if it is enabled here.

The transmitter provides four stick modes, you can set it according to your habit. CH1 represents Aileron, CH2 represents Elevator, CH3 represents Throttle, CH4 represents Rudder.

Function settings:

1. Select STICK MODE and press Scroll Wheel to enter.
2. Select an appropriate item by scrolling Scroll Wheel and press Scroll Wheel to finish.
3. Test the function to confirm all the channel direction is the same as the actually expected direction.
4. The mechanical structure may adjust as needed after the mode is selected. Namely, the throttle needs to be adjusted from self-centering to non-self-centering and vice versa. In addition, in the mode of throttle non self-centering, the throttle position should be adjusted when it is from left to right and vice versa. For other changes, the adjustment is not required.

Mode 2 (M2) is the default mode. Changing between modes 2/4 (M2/M4) and modes 1/3 (M1/M3) will necessitate changing the throttle gimbals position. You need to open up the product, see 8.3 Swapping Gimbals for details.

Note: This function was updated in version 1.0.57.

The system setting function is used to configure the transmitter system. It includes the following options: SOUND, VOLUME, ALARM TIME, VIBRATION, GRADE, BATTERY TYPE, LED COLOR, LED BRIGHTNESS, CONTRAST, BACKLIGHT TIME, and AUTO SHUTDOWN.

Notes:

1. Leaving the screen on for longer will use more power and as such may lead to reduced battery time.
2. If the transmitter enters sleep mode, you can exit sleep mode by operating the scroll wheel, MENU button, EXIT button, or power button.

Function settings:

1. Select SYSTEM SETTING and press Scroll Wheel to enter.
2. Select a function you want to set and press Scroll Wheel, the selected box is flashing now.
3. Select an appropriate item and press Scroll Wheel to finish. Press EXIT to save the settings and exit.

The Timer function is used for timing in races, including count up and countdown. You can also use it to test a tank of fuel or a full battery and confirm the usage time. The transmitter provides two timers, which can be set independently to achieve different timing functions. Start, stop and reset switches can be set to enable, disable or reset the timer by the switch. The timer alarm time can also be set. After setting the time, the system will send an alarm for reminder 10 seconds prior to the expiration. The main interface will display it after the timer is set.

Function settings:

1. Select TIMERS and press Scroll Wheel to enter.
2. For TYPE, the selected box will be flashed when chosen. Select UP or DOWN. If DOWN is selected, you need to set the time using Scroll Wheel, then press EXIT to save it.
3. Set switches to START, STOP and RESET using Scroll Wheel. You can also set a throttle trigger value to start the timer to calculate the working time of the throttle after the timer is on.
4. For ALARM, set ON or OFF using Scroll Wheel. If an alarm is set, you need to set the alarm time using Scroll Wheel. Press EXIT to save it.

Used to set which controls can be assigned including SW class switches, Dials (Upgraded version), buttons on the back (Upgraded version) or Knobs.

Through this function, you can set the throttle mode for self-centering or non-self-centering by setting THRO. If you set to self-centering, the stick position is not prompted upon power-on. You can also set the number of channels of transmitter by setting CH NUM, and the range is 8 to 12.

Function settings:

1. Select SWITCH SETTINGS and press Scroll Wheel to enter.
2. Select a control you want to set using Scroll Wheel.
3. Select an appropriate item and press Scroll Wheel to confirm. Press EXIT to save the settings and exit.

Notes:

1. You can set three-position switch to two-position switch via this function.
2. In addition, you can set the position-level when the physical switch needs to be changed here.

To enable or disable the switch self-check prompt function and failsafe setting prompt function in case of power-on.

Function settings:

1. Select BOOT SETTINGS and press Scroll Wheel to enter.
2. Select SWITCH SELF CHECK and press Scroll Wheel, then set to ON or OFF using Scroll Wheel.
3. Select FAILSAFE PROMPT and press Scroll Wheel, then set to ON or OFF using Scroll Wheel. Press EXIT to save the settings and exit.

Used to update the firmware of the transmitter. When the firmware needs to be upgraded, it is needed to put the transmitter into upgrade mode using this function first.

Function settings:

1. Download the latest firmware.
2. Connect the transmitter and the PC via a USB Type-C cable. Open the firmware on a computer.
3. At the transmitter side, select FIRMWARE UPDATE. The system will show a prompt menu, select OK and press Scroll Wheel to put the transmitter into updating mode. Click Update on the firmware screen on the computer.

Notes:

1. Always ensure sufficient power supply for the transmitter when using this function. To avoid the receiver losing control, make sure to power off the receiver before starting this function.
2. Don't disconnect the USB Type-C cable during the firmware updating, otherwise the transmitter may occur a fault.
3. You can also upgrade the firmware through FLYSKYAssistant with Version 3.0 or later.

Used to display the system information, such as hardware version, etc.

Function settings:

Select ABOUT and press Scroll Wheel to enter, then you can view the related information.

To obtain the user manual via this function.

Function settings:

Select HELP CENTER and press Scroll Wheel to enter, then you can view the related information.

Used to restore the entire transmitter system to the factory settings in case a number of parameters are adjusted incorrectly during operation. Reset all data of the model current in use. All other models are reset except MDL SET, MODEL TYPE and MODEL NAME.

Function settings:

1. Select FACTORY RESET and press Scroll Wheel to enter, then a pop-up menu appears.
2. Select OK and press Scroll Wheel to finish.

Note: This function was updated in version 1.0.57.

For some advanced users, there may be several different requirements when flying the same model. For example, some players set their model airplane to a specific condition for takeoff, increasing the channel action to handle various uncertainties during the takeoff process. They then switch to another condition for normal flight. For F3A models, you need to adjust each action to be smaller and smoother to achieve more accurate movements.

A switch can be assigned to switch between these conditions. There are three conditions available, with the following priority levels: Condition 3 has the highest priority, while Condition 1 has the lowest priority.

Function settings:

1. Select CONDITION and press Scroll Wheel to enter.
2. Select an item you want to set and press Scroll Wheel to enter the next level menu. Assign a switch/knob to switch condition.

Note: This function was updated in version 1.0.57.

This function can be divided into two parameters. Firstly, the rate can be quickly adjusted in different states to set the output value of certain channels. The adjustment includes symmetrical treatment at both ends of the range. In different states, you can set different output values to achieve the best control effect. The rate function can be used to set CH1, CH2, and CH4. The output data can be adjusted within the range of 0 to 100%.

Secondly, the curve is set according to different flight effect requirements. For example, in F3C, delicate and smooth operations are needed for flight actions. The curve data can be adjusted from 0 to 100%. The larger the data, the more delicate the control becomes by reducing median sensitivity. Conversely, the lower the data, the more coarse the control action becomes by increasing median sensitivity (down to -100%). These settings can be used for special 3D maneuvers.

Function settings:

1. Select RATE/CURVE and press Scroll Wheel to enter.
2. Select CH and press Scroll Wheel, then select a channel you want to set and press Scroll Wheel to confirm.
3. Select RATE and press Scroll Wheel, then select a value you want to set and press Scroll Wheel to confirm.
4. Select EXP and press Scroll Wheel, then select a value you want to set and press Scroll Wheel to confirm.
5. Press EXIT to save the settings and exit.

Note: This function was updated in version 1.0.57.

It is a function specifically for throttle channel to achieve the perfect match between throttle output and motor or engine. It can be set individually in different flight conditions, with 7 dynamic adjustment points throughout the travel. You can set freely to achieve the best control effect on the throttle.

Function settings:

1. Select THROTTLE CURVE and press Scroll Wheel to enter.
2. Select a point you want to set and press Scroll Wheel, then select a value you want to set and press Scroll Wheel to confirm. Press EXIT to save the settings and exit.

Note: This function was updated in version 1.0.57.

This is a common function used for adjustment and trimming. It is also used before take-off and during landing to maintain the normal output of other channels while completely locking the throttle channel output. This ensures a safe working state. You can enable the function, set the status switch, or set the lock position as needed.

Function settings:

1. Select THROTTLE HOLD and press Scroll Wheel to enter.
2. Set ON or OFF to turn on or turn off using Scroll Wheel.
3. Set a switch. In the menu, select a switch and its corresponding position to finish, or you can toggle the corresponding physical switch on the transmitter to finish.
4. Set CUT POSITION, select an appropriate value then press Scroll Wheel. Press EXIT to save the settings and exit.

Note: This function was added in version 1.0.57.

To set the DUAL-RATE/DR function, switch, and effective condition. The transmitter supports 4 sets of DUAL-RATE/DR settings. When 2 or more sets of DUAL-RATE/DR settings are assigned to the same channel and all are enabled, the one that is placed later has a higher priority.

After enabling this function, the DUAL-RATE/DR icon will be displayed on the corresponding interface.

Function settings:

1. Select DUAL-RATE/DR and press Scroll Wheel to enter.
2. Select CH and press the scroll wheel to set the desired channel.
3. Select SWITCH and press the scroll wheel to enter the settings menu. Choose the control or toggle the corresponding physical control.
4. Select ENABLE and press the scroll wheel to enter the ENABLE CONDITION interface. Choose the condition you want to enable, then press EXIT to save the settings and exit.

This function is designed for specific aircraft models, such as fixed-wing aircraft with V-tails. It allows you to perform mixing control for both channels in the same direction or in the reverse direction.

Function settings:

1. Select V-TAIL and press Scroll Wheel to enter.
2. Set ON or OFF to turn on or turn off using Scroll Wheel.
3. Select the channel and select an appropriate value then press Scroll Wheel. Press EXIT to save the settings and exit.
4. Carry out a test to confirm that the transmitter functions normally after it is set.

This function is designed for specific aircraft models, such as delta-wing aircraft with two ailerons. Use this function to make the ailerons perform as elevators.

Function settings:

1. Select DELTA-WING MIX and press Scroll Wheel to enter.
2. Set ON or OFF to turn on or turn off using Scroll Wheel.
3. Select the channel and select an appropriate value then press Scroll Wheel. Press EXIT to save the settings and exit.
4. Carry out a test to confirm that the transmitter functions normally after it is set.

This function is designed for specific models, such as tank and excavator models. The two tracks can be driven in the same direction or in reverse directions. In these cases, the track mixed control function can be used.

By default, CH1 and CH2 are assigned. You can assign CH1 and CH2 to controls such as knobs VRA and VRB, or dials VRC and VRD (Upgraded version) by setting the GENER Menu > AUX CH.

You can use CH1 control for reverse motion and differential steering, that is, turning left or right. Additionally, you can use CH2 control for forward and backward movement.

Function settings:

1. Select TRACK MIX and press Scroll Wheel to enter.
2. Select STATUS and press Scroll Wheel.
3. Select an item and select an appropriate value then press Scroll Wheel. Press EXIT to save the settings and exit.
4. Carry out a test to confirm that the transmitter functions normally after it is set.

Note: This function was updated in version 1.0.57.

This function is set for some specific models, for example, helicopter models. Adjust the helicopter's pitch motion curve to match the throttle output to achieve the best flight status of the helicopter.

Function settings:

1. Select PITCH CURVE and press Scroll Wheel to enter.
2. Select a point you want to set and press Scroll Wheel, then select an appropriate value and press Scroll Wheel to confirm. Press EXIT to save the settings and exit.

Note: This function was updated in version 1.0.57.

To set the value of the gyroscope and whether to enable the function.

Note:

1. By default, KEY1 is used to decrease the value and KEY2 is used to increase the value. You can change it via REVERSE function, namely, after the reverse, KEY1 is to increase the value and KEY2 is to decrease the value.
2. The assigned channels for Gyroscope 1 and Gyroscope 2 channels must be different.
3. When the gyroscope function is enabled, if the channel assigned by this function is reassigned in AUX CH function, the settings assigned in AUX CH function will be invalid.

Function settings:

1. Select GYROSCOPE and press Scroll Wheel to enter.
2. Select STATUS and press Scroll Wheel, then set to ON or OFF using Scroll Wheel.
3. Select CH and press Scroll Wheel, then set an appropriate channel.
4. Then set the CONTROL, MID (neutral), RANGE and STEP. Press EXIT to save the settings and exit.

Note: This function was updated in version 1.0.57.

The function setting is the same as that of Gyroscope 1, but the output channels for Gyroscope 1 and Gyroscope 2 must be different.

To display the real time output status of all channels, you can monitor the current output status of all channels.

Function settings:

Select MONITOR and press Scroll Wheel to enter the monitoring menu. Then view the channel information.

Note: There is another hidden function on menu: Channel test. Press and hold the Scroll Wheel in this menu. The system will prompt "Confirm access channel test?". Select OK and press Scroll Wheel to enter. All channels will be output in one direction. It is convenient to detect whether the corresponding channel is normal. This function can also be used in the distance test.

You can perform the reverse processing of the output data of one channel or more channels. This function is used in the debugging of a model.

Models may follow different standards in the design. In the assembly and debugging of a model, if you find that the operation model is opposite to the required direction, for example, the model goes to the left when you want the right direction, the output signal direction of the transmitter needs to be adjusted at this time. The function is used to adjust the action direction of output signals of each channel.

Function settings:

1. Select REVERSE and press Scroll Wheel to enter.
2. Select a channel you want to set and press Scroll Wheel to set NOR (normal) or REV (reverse). Press EXIT to save the settings and exit.
3. Carry out a test to confirm that the directions of servos are same as your required direction.

Adjust the travel amount of the servo output. This function is used in debug. This function can be used to set the travel of the HIGH, LOW and SUBTRIM at both ends of the channel respectively.

When the model is designed, there are changes in the size of the structure and the specification may not be unified. In addition, there may be different sizes of operator's habitual actions. The servo travel function can be used to set the travel amount required for each channel to adjust the corresponding structure for the best match, to obtain the required operation effect. For example, you want to operate that the turning action is not so large, you can adjust the value of the direction channel at both ends to be smaller. In this way, the turning action should be smaller, with less likely to be tailspin.

Function settings:

1. Select END POINTS and press Scroll Wheel to enter.
2. Select an item you want to set, select an appropriate value then press Scroll Wheel. Press EXIT to save the settings and exit.

Note: This function was updated in version 1.0.57.

This function can be used to adjust the output speed of some channels for a specific model. For example, in the landing gear retraction, users may want it to be opened slowly, therefore, you can slow down the output speed of the corresponding channel.

Function settings:

1. Select CH SPEED and press Scroll Wheel to enter.
2. Set ON or OFF to turn on or turn off using Scroll Wheel.
3. Set a switch. In the menu, select a switch and its corresponding position to finish, or you can toggle the corresponding physical switch on the transmitter to finish.
4. Set a speed value. Press EXIT to save the settings and exit.

Note: This function was updated in version 1.0.57.

For some models with complex functions, we provide up to 12 channels of output, 8 of which are auxiliary channels for the most effective control of multiple functions in different ways. The AUX CH (auxiliary channel) function is used to set the control settings for CH5 to CH12, assigning the controls to the channels for operation.

Function settings:

1. Select AUX CH and press Scroll Wheel to enter.
2. Select an auxiliary channel and press Scroll Wheel to enter the switch assigned menu.
3. Set a switch. Press EXIT to save the settings and exit.

To set the step value of the trims.

Function settings:

1. Select TRIMS and press Scroll Wheel to enter.
2. Select a trim you want to set and press Scroll Wheel.
3. Select an appropriate value then press Scroll Wheel. Press EXIT to save the settings and exit.

Note: This function was updated in version 1.0.57.

MIXES is enabled for some models that require two channels to act in linkage. For example, you can perform rudder compensation so that the aircraft will not lift its nose when throttling up. This transmitter provides up to 8 groups of mixes.

Function settings:

1. Select MIXES and press Scroll Wheel to enter.
2. Set ON or OFF to turn on or turn off using Scroll Wheel.
3. Set a switch. In the menu, select a switch and its corresponding position to finish, or you can toggle the corresponding physical switch on the transmitter to finish.
4. Set a channel for M or S using Scroll Wheel.
5. Set appropriate values for NOR, REV and OFFSET using Scroll Wheel.
6. Press EXIT to save the settings and exit.

For function settings, refer to 4.3 Binding for details.

Note: This function was updated in version 1.0.57.

Failsafe is an important safety setting. It can be used to protect the model from loss or reduce the degree of loss when the receiver loses signal without control. In addition, it plays a role in protecting personnel safety.

You can set the data in case of out-of-control for all output channels.

The failsafe judgment time can be configured within a range of 250ms to 1000ms. By default, this time is set to 700ms for gliders, helicopters, delta wings, fixed-wing aircraft, and multicopters. For engineering vehicles, boat models, car models, and robots, the default failsafe judgment time is 300ms.

Function settings:

1. Navigate to the Main Menu > MENU button > RX SET, then select FAILSAFE. Press the scroll wheel to enter the failsafe settings interface.
2. Select FAILSAFE JUDGMENT TIME and press the scroll wheel. The option box will start blinking. Scroll the wheel to set the desired value, then press the scroll wheel to confirm.

For i-BUS/PPM/PWM signal. The FS-ST8 system supports three options including NOT SET, NONE or ON.

• NOT SET: The failsafe has not been set, and there is no output in case of out-of-control.
• NONE: It is no output for i-BUS/PPM/PWM channel.
• ON: i-BUS/PPM/PWM channel output respectively the set value. Namely, you can set a value respectively for each channel from 1 to 12. By default, this value is the reading of current channel output value.

Function settings:

1. Navigate to the Main Menu > MENU button > RX SET, then select FAILSAFE. Short press the scroll wheel to enter the failsafe settings interface.
2. Set all channels: Select ON and short press the scroll wheel. The system will pop up a prompt interface. Adjust the corresponding controls to the desired positions and hold them if necessary. Select OK on the pop-up prompt interface and short press the scroll wheel again. The failsafe setting for all channels is completed.
3. Set an individual channel (if needed): Select the channel you wish to configure and short press the scroll wheel. Choose the appropriate value or adjust the corresponding control to the desired position and hold it. Short press EXIT to save the settings and exit.

Notes:

1. Because the S.BUS signal contains the failsafe flag bit, the receiver can transmit the "Failsafe State" information to the subsequent device through the failsafe flag bit, instead of using OFF. The subsequent device can make response accordingly by parsing the failsafe flag bit information.
2. For the signal PWM/PPM/i-BUS without the failsafe flag bit, it supports the settings of OFF in case of failsafe. The "Failsafe State" information is transmitted to the subsequent device through OFF state.
3. Caution: Remove the propeller prior to the failsafe test.

As an interesting feature for two-way communication systems, sensors can be used to send back some information you need through the receiver.

The transmitter can support up to 15 different types of returned data to provide you with the feedback of seven basic parameters, i.e., TX VOL (TX voltage), RX VOL (RX voltage), BVD VOL (BVD voltage), SIGNAL (signal intensity), NOISE, SNR (noise rate) and RSSI.

Notes:

1. For BVD function, it is used to detect an external power supply. It is recommended to use this function to monitor the battery voltage and give an alarm in case of a failure. To perform an alarm by setting alarm values for LOW and HIGH.
2. The range for the BVD voltage detection is from 0 to 70.
3. The ID number 0 represents the transmitter or the receiver's voltage, signal strength, RSSI, Noise, or SNR. And the ID number 2 represents the first external sensor connected to the receiver, and so on. There are up to 15 sensors can be connected. It supports i-BUS series sensors, such as FS-CAT01 (altitude), FS-CPD01 (speed / magnetic), FS-CPD02 (speed / optical), FS-CVT01 (voltage), FS-CTM01 (temperature) and FS-CGPS01 (GPS).

Function settings:

1. Connect a sensor to the receiver via the SENS interface. At the transmitter side, select SENSOR and press Scroll Wheel to enter.
2. Select an item you want to set using Scroll Wheel, such as TX VOL. Using Scroll Wheel, you can set it to display on the main menu, as well as set an alarm function and its alarm value corresponding to LOW and HIGH voltage. Press EXIT to save and exit.

The display of each sensor on the interface and main page is shown in the following table:

This function is a special feature provided by FLYSKY. The setting allows you to make corrections to the parameters of some external sensors that need to be calibrated, so as to display the sensing data accurately. For example, for the external voltage sensor (BVD), after calibration, the displayed data will be closer to the real value.

Function settings:

1. Select SENSOR CALIBRATION and press Scroll Wheel to enter.
2. Select an item you want to set using Scroll Wheel.
3. Select an appropriate value and press Scroll Wheel to confirm. Press EXIT to save and exit.

This function needs to be used with the FS-CGPS01 GPS sensor of FLYSKY. You can view the information returned by GPS sensor after calibrating the GPS and setting an appropriate time. You can reset the start point when the displayed distance is inaccurate.

Function settings:

1. Select GPS SETTING and press Scroll Wheel to enter.
2. Select GPS DISPLAY and press Scroll Wheel to display the related information.
3. Select GPS CALIBRATION and press Scroll Wheel to enter. Select CALIBRATION and press Scroll Wheel to start.
4. Select RESET START POINT and press Scroll Wheel, the system will pop up a menu, select OK and press Scroll Wheel to finish.

This function is a unique and powerful serial communication protocol system provided by FLYSKY. It can be output to any channel by setting. For receivers with i-BUS interface and corresponding accessories, such as Serial Bus Receiver FS-CEV04. This function will be displayed when you set the OUTPUT to i-BUS mode via BIND SETTINGS function.

Function settings:

1. The transmitter FS-ST8 and the receiver FS-SR8 are bound successfully. Connect the input cable of the Serial Bus Receiver FS-CEV04 to the SERVO interface of the receiver.
2. At the transmitter side, select i-BUS SETTINGS and press Scroll Wheel to enter.
3. Select a channel to be assigned, the system will show a prompt menu, if the channel is incorrect, select CANCEL to cancel.
4. If the selected channel is about to assign to C1 channel of the Serial Bus Receiver FS-CEV04, then press the button K1 corresponding to C1 channel of FS-CEV04 receiver by a long thin tool, such as a thin tool which is tied with the Bind cable. After the setting is successful, the system will pop up a menu showing successful.

Note: If the receiver is overloaded, please supply power separately to prevent the wire from being burnt out due to excessive current.

Used to test whether wireless communication between the transmitter and the receiver is normal and the ambient radio interference.

As the actual remote control distance between transmitter and receiver is far away, it is difficult to make the transmitter and the receiver apart to several hundred meters to verify whether the RF module works normally. By using this function, the theoretical remote control distance can be reduced to 30-40 meters. When this function is enabled, it can test whether the transmitter and receiver are normal in a close distance, so as to save the test time.

Function settings:

1. Make sure the transmitter and the receiver are bound normally.
2. Access the RANGE TEST interface and pull down the SWD button.
3. One person stands in place with the model in hand, and the other person holds the transmitter and gradually moves away to 30-40 meters and walks around with this distance as a radius centered on this model.
4. Make sure that the transmitter antenna is not blocked. The receiver antenna is placed at 90 degrees if there are two antennas, and there is no interference between the transmitter and the receiver in the open area.
5. Observe the signal strength of the transmitter. If the signal strength is high and stable, it means that the radio frequency of this system works normally.

This is an extended function option. The setting is used when the external RF module is needed. The EXT RF can be set to one of the following items: OFF, PPM.P, PPM.N, S.BUS, FRM303, CRSF and CRSF2, so as to be compatible with the external RF module with different protocol. When the external RF is set to CRSF2 or FRM303, the INT RF (local RF) is disabled.

When EXT RF is set to FRM303 to comply with FRM303 RF module, these functions can be set at the transmitter side: refer to 6.5 Receiver Settings With EXT RF (FRM303 RF MODULE) for details.

If it sets to CRSF, it supports the CRSF RF module.

If it sets to CRSF2, it supports the CRSF RF module, and the receiver bound with the transmitter can return RSSI as well. It can return flight control voltage, flight control current and battery capacity information.

Function settings:

1. Select RF SETTINGS and press Scroll Wheel to enter.
2. Select an item you want to set using Scroll Wheel.
3. Select an appropriate item and press Scroll Wheel to confirm. Press EXIT to save and exit.

Note: When the external RF is set to FRM303, the input signal of the FRM303 RF module should be set to open source protocol. To set it via the following steps: Push upwards the Up key of the five-way key for greater than or equal 3 seconds and less than 9 seconds while powering on the RF module, it enters the input signal setting state. And at the time, the LED in blue is solid on. Then push upwards the Up key or push downwards the Down key to switch the input signal. When the LED is working in four-flash-one-off mode repeatedly, it is indicating that it is the input protocol complied, then press the Center key for 3 seconds to save the settings. Push the Left key to let the FRM303 RF module to exit the signal setting state.

Note: This function was added in version 1.0.57.

This function is used to set up the alarm feature for signal strength when the transmitter and receiver communicate in two-way mode.

You can specify the alarm signal strength value, as well as whether to enable repeated alarms and set the time interval for repeated alarms. Additionally, the alarm sound and vibration can be enabled or disabled.

After setting the low signal alarm function, when the receiver's signal strength falls below the set value, the transmitter will trigger a low signal alarm according to the configured method.

Function settings:

1. Select LOW SIGNAL ALARM and press Scroll Wheel to enter.
2. Select STATUS and press Scroll Wheel to toggle between ON or OFF.
3. Select RANGE and press Scroll Wheel. The option box will begin to blink. Scroll the wheel to set the desired value, then press the scroll wheel to confirm.
4. Select REPEAT and press Scroll Wheel. The option box will begin to blink. Scroll the wheel to set the desired value, then press the scroll wheel to confirm.
5. Select SOUND and press the scroll wheel to toggle between ON or OFF.
6. Select VIBRATION and press the scroll wheel to toggle between ON or OFF.

Note: If the alarm sound is turned off (SYSTEM SETTING > SOUND/VOLUME), the alarm sound will not be triggered even if it is enabled here.

Note: This function was added in version 1.0.57.

Used to set up the alarm function for telemetry loss when the transmitter and receiver communicate in two-way mode.

You can set the alarm trigger time and choose whether to enable or disable the alarm sound and vibration.

Function settings:

1. Select TELEMETRY ALARM and press Scroll Wheel to enter.
2. Select STATUS and press Scroll Wheel to toggle between ON or OFF.
3. Select ALARM VALUE and press Scroll Wheel. The option box will begin to blink. Scroll the wheel to set the desired value, then press the scroll wheel to confirm. ALARM VALUE is used to indicate how long after telemetry loss the alarm should be activated. Note that if the connection is interrupted and then restored within the sensitivity time duration, the alarm will not be triggered.
4. Select SOUND and press the scroll wheel to toggle between ON or OFF.
5. Select VIBRATION and press the scroll wheel to toggle between ON or OFF.

Note: If the alarm sound is turned off (SYSTEM SETTING > SOUND/VOLUME), the alarm sound will not be triggered even if it is enabled here.

After the FRM303 RF module is connected to the FS-ST8 transmitter, it can be bound with the FlySky 3rd generation receiver (classic edition and enhanced edition).

If binding with the classic edition receiver, RF system can choose CLASSIC 18CH or C-FAST 10CH. And for the enhanced edition receiver, ROUTINE 18CH, FAST 8CH or LORA 12CH can be selected.

The RF standard can be set to 1WAY or 2WAY based on the actual application scenario.

Function settings:

1. Select BIND SETTINGS and press Scroll Wheel to enter.
2. Select RF STD and press Scroll Wheel, then set it to 1WAY or 2WAY using Scroll Wheel.
3. Select RF TYPE and press Scroll Wheel, then set an appropriate item. Press EXIT to save and exit.

Set the type of output signal of the receiver interface. The interface shown on the left side can be set, and on the right side, the protocols that can be set.

For enhanced edition receiver: When no receiver is connected, 4 Newport interfaces are displayed by default for setting; when a receiver is connected, the Newport interfaces that can be set on this receiver are displayed, you can set the protocol to PWM, PPM, S.BUS, i-BUS-IN or i-BUS-OUT.

For classic edition receiver: When no receiver is connected, i-BUS and CH1 are displayed by default; when a receiver is connected, the interfaces that can be set are displayed.

Function settings:

1. Select PORT PROTOCOL and press Scroll Wheel to enter.
2. Select the interface you want to set and press Scroll Wheel, then set an appropriate protocol using Scroll Wheel.
3. Press EXIT to save and exit.

Notes:

1. Neither classic edition receiver nor enhanced edition receiver supports i-BUS-IN setting in one-way communication.
2. The signal types that can be selected once only in multiple for any Newport: PPM, S.BUS, i-BUS-IN and i-BUS-OUT. If it is selected for NPA, i-BUS-OUT cannot be selected again for NPD/NPC/NPB.
3. If the interface protocol is set to i-BUS-IN, it can be used to connect the i-BUS sensors.
4. If the interface protocol is set to i-BUS-OUT, it supports i-BUS/S.BUS signal output, the FS-CEV04 serial BUS receiver can be connected as well.
5. The Newport interface of the enhanced receiver is abbreviated NPA, NPB, NPC, and NPD. And the enhanced receiver supports up to 4 Newport interfaces.

For failsafe, the transmitter provides the following three settings:

• To disable the signal output of i-BUS-out and PPM protocol interfaces in case of out-of-control, i.e., no output for i-BUS-out & PPM interfaces in case of out-of-control.
• Set all channels. That is, all channels are set to the same value. It can be set one of NONE, HOLD, or FIXED VALUE.
• Set failsafe values channel by channel to one of NONE, FIXED VALUE or HOLD.

Function settings:

1. Select FAILSAFE and press Scroll Wheel to enter.
2. Select the item you want to set and press Scroll Wheel.
3. Then set an appropriate value using Scroll Wheel. Press EXIT to save and exit.

The receiver's output frequency of PWM signals can be regulated. Theoretically, the higher the frequency, the faster the signal is refreshed, and the faster the servo responds to the signal change. However, some servos may not support PWM signals with excessively high frequency. You may need to take into account the servo's performance when doing such settings.

The interface of this function may vary with bind modes. For enhanced edition receivers, the PWM frequency of each channel can be set separately, and the options include ANALOG (50Hz), DIGITAL (333 Hz), SR (833 Hz), SFR (1000 Hz) and CUSTOM.

If a classic receiver is bound, all channels are set together, and the options include ANALOG (50Hz), DIGITAL (333 Hz) and CUSTOM. It cannot be set to SR (833 Hz) and SFR (1000 Hz).

Function settings:

1. Select PWM FREQUENCY and press Scroll Wheel to enter.
2. Select the item you want to set and press Scroll Wheel.
3. Then select/set an appropriate value using Scroll Wheel. Press EXIT to save and exit.

Through this function, you can select a channel to output the signal strength value of the receiver. After the function is enabled, the selected channel does not perform the output of transmitter's corresponding channel function, but outputs the receiver's signal strength value. When the function enables, the CH14 is the default channel. This function is necessary for users who use FPV glasses in the operations of traversers. We recommend you to select the CH14 or any auxiliary channel. You can make corresponding adaptations in the flight control settings to view the signal strength information on FPV glasses.

Function settings:

1. Select SIGNAL STRENGTH and press Scroll Wheel to enter.
2. Select STATUS and press Scroll Wheel.
3. Select OUTPUT CH using Scroll Wheel and set an appropriate channel as you desired. Press EXIT to save and exit.

Except the functions described in 6.4.3 RX SET - SENSOR section, it can also check the temperature and voltage information of external RF module FRM303, and set whether to display it on the home page and alarm function as well.

See 6.4.3 RX SET - SENSOR section for function settings.

Note: If the i-BUS sensor is connected to an enhanced edition receiver, then set the interface protocol of the Newport to i-BUS IN.

Please refer to 6.4.5 RX SET - GPS SETTING for this function.

Except the functions described in 6.4.8 RX SET - RF SETTINGS section, it can also enable or disable the buzzer alarm function, and you can set an appropriate power if the FRM303 RF module supports power regulation by POWER SETTING function. In addition, you can view the related information about the RF module as well.

POWER SETTING (power regulation)

Set the power of FRM303 RF module, the options include 25mW, 100mW, 500mW, 1W, or 2W.

Note that the power supply mode affects the power output. When the RF module is supplied externally, the maximum power output is 2W; the maximum output power is 25mW for USB power supply; and the maximum output power is 500mW for internal power supply.

Function settings:

1. Select POWER SETTING, a prompt screen comes along with it to show the output power information. Then press OK.
2. Set an appropriate power as you desired. Press EXIT to save and exit.

RF VERSION

To view information about the RF module, such as version, model, ID, and whether the RF power can be regulated or not.

Function settings:

Select RF VERSION and press Scroll Wheel to view the related information. Press EXIT to exit.

Display information about the receiver bound, such as receiver model, version, and ID.

Function settings:

Select ABOUT RECEIVER and press Scroll Wheel to view the related information. Press EXIT to exit.