Paladin PL18 Ultra user manual

PL18 transmitter has two built-in antennas. When the transmitter starts to work, the antennas automatically operate, without additional operations.

The PL18 Ultra features two joysticks (left and right), three knobs (VRA, VRB, and VRC), eight switches (SWA, SWB, SWC, SWD, SWE, SWF, SWG, and SWH), two dials (VRD and VRE), and eight trim buttons (TR1, TR2, TR3, TR4, TR5, TR6, KL, and KR).

• Sticks: They output different values depending on their position and can output continuous signals. They can be used as function controls, as well as switches to turn functions on or off.
• Knobs/Dials: They can perform the same functions as sticks. Some of them can also be used as trim controls, as well as switches to turn functions on or off.
• Switches: There are two-position, three-position and self-return switches. Different values correspond to different positions. They can be used as function controls, as well as switches to turn functions on or off.
• Trim buttons: They output different values when toggled up or down. They can be used as function controls; for detailed information, refer to section 7.8 on Digital Trim.

Status indicator (LED) is used to indicate the power and working status of the transmitter.

• The LED is off: Indicates that the transmitter is powered off and not in a charging state.

When the transmitter is powered on, the LED can be in two states: flashing or solid on.

• The LED is off: The transmitter is shutting down.
• The LED is flashing in red: Indicates an alarm, such as a sensor alarm trigger, receiver disconnection, or power-on control position alarm.
• The LED is flashing in green: Indicates binding is in progress or PWM converter is being configured.
• The LED is solid on in green: Indicates connection to the receiver.
• The LED is solid on in blue: Indicates no receiver connected or searching for the receiver.
• The LED is solid on in cyan: Indicates the transmitter is powering on.
• The LED is solid on in yellow: Indicates that the RF is not enabled.

When the transmitter is in a powered-on dormancy state and not charging:

• The LED flashes slowly in blue: Indicates the battery level is high.
• The LED flashes slowly in yellow: Indicates the battery level is medium.
• The LED flashes slowly in red: Indicates the battery level is low.

When the transmitter is in dormancy or power-off state and charging: The LED is cyan to indicate fast charging, and orange to indicate slow charging. The LED has 4 individual lights inside.

• The first LED flashes slowly: Indicates the current battery level is less than 25%.
• The first LED is solid on and the second LED is flashing slowly: 25% ≤ current battery level < 50%.
• The first and second LEDs are solid on and the third LED is flashing slowly: 50% ≤ current battery level < 75%.
• The first three LEDs are solid on and the fourth LED is flashing slowly: 75% ≤ current battery level < 99%.
• LED is solid on: The battery is fully charged and the charger is connected.

Note: This function was updated in version 2.2.18.

This system supports four stick modes. As for aircraft models, from channel 1 to channel 4, by default, these four channels are assigned to aileron, elevator, throttle, and rudder. There are four preset modes of the sticks in order to meet the different requirements. You can select a suitable mode among Mode1, Mode2, Mode3 and Mode4. The green frame indicates the currently selected mode, and the default mode is Mode 2. You can select a suitable mode as you desire. Then you need to adjust the gimbals as needed to match the mode. Follow the steps below.

Setup:

1. Enter the Model setup interface via (Basic) > Models, then tap the function box next to Stick to enter the stick mode interface.
2. Select the mode as you desire. Then click the back arrow to return.

This can also be done after upgrading the firmware or performing a factory reset.

Gimbal assembly non self-centering (self-centering) / friction / tension adjustment

As shown above, by adjusting the screws which are located in the screw holes in the back of the transmitter, the gimbal stick can be set to either self-centering or non-self-centering and the friction in case of non self-centering, as well as changing stick tension in case of self-centering (remove the grips to find the relevant screw holes and screws). Screw description is as following:

Take right gimbal stick as example.

Non-self-centering to self-centering:

1. Use the screwdriver to adjust the screw ① (shown on previous diagram) counterclockwise until the gimbal stick changes to self-centering.
2. Adjust the screw ④ counterclockwise to adjust the frictional force.
3. If you need to adjust the horizontal centering force or vertical centering force, adjust the corresponding screw ③ or ② accordingly. The force increases clockwise, and decreases counterclockwise.

Self-centering to non self-centering:

1. Use the screwdriver to adjust the screw ① clockwise until it is tightened so that the gimbal stick changes to non self-centering.
2. Adjust the screw ④ clockwise to strengthen the frictional force.
3. If you need to adjust the horizontal centering force, adjust the screw ③ accordingly. The force increases clockwise, and decreases counterclockwise.

Gimbal assembly vertical travel adjustment

For the gimbal assembly of the transmitter, the adjustable range of mechanical travel is from 38° to 54°. Travel can be adjusted as you desire.

Note: Pay attention to the force when adjusting.

The steps are as follows:

1. Use a metric 1.5mm Allen wrench to adjust the corresponding screw in a clockwise direction to increase the travel.
2. Adjust the corresponding screw in the counterclockwise direction to decrease the travel.

If the gimbal spring is not elastic enough or is damaged, the user can replace it. Please refer to the following steps:

1. Remove the 8 screws with an appropriate size Allen wrench after removing the transmitter's grip.

1. After removing the back cover of the transmitter, the spring can be replaced with a suitable tool such as tweezers.

Follow the steps below to install the right hand tray, the left hand tray can be installed by following the same steps.

1. According to the letters on the hand tray, you can confirm whether it is the right-hand tray or the left-hand tray (R: right-hand tray, L: left-hand tray).
2. After confirming the position of the right-hand tray screw holes, install the screws using a metric 2.5mm Allen wrench.
3. Push the right-hand tray in the direction of the arrow as shown until it is not easily dropped.
4. Install the screw in the direction of the arrow as shown, and select the appropriate position based on the scale marks on the right-hand tray for installation, until the right-hand rest is securely in place and does not easily become loose.

Follow the steps below to install the bracket:

1. Align the bracket with the slot position of the transmitter base, push the bracket in the direction of the arrow as shown until the bracket snaps into the position properly.

1. Use a metric 2.5mm Allen wrench to attach the screw in order to secure the bracket.

The handle can be adjusted according to the two positions in figure 2 and figure 3.

Steps: Press the Handle Adjustment Button and turn the handle. Then, release the handle until it locks into place.

Note: The handle can be adjusted to its maximum or minimum position for easier storage.

To prevent false triggering, there are two switches on the lower part of the transmitter. Turn on or turn off the transmitter when both switches are pressed at the same time.

Follow the steps below to install the transmitter battery:

1. Remove the 4 screws securing the base.

1. Push the base in the direction of the arrow as shown until it is removed.

1. Install the 1S LiPo battery into the battery compartment and connect the battery wiring to the Battery Connector (JST).

1. After aligning the icons on the base and the transmitter, push the base in the direction of the arrow until it is in place. Then, lock the screws and be careful to avoid pinching the battery wiring.

The center of gravity regulator can be installed according to the usage scenario. The steps are as follows:

Align the screw, washer and center of gravity regulator in sequence with the center of the neck strap hook as shown, and secure them at the neck strap hook position.

This transmitter supports replacement of SW-type 3-position/2-position switches, which can change from 3-position switch to 2-position switch or vice versa.

The steps are as below:

1. Refer to the previous steps to remove the grips, then remove the eight screws securing the back cover.
2. Remove the back cover of the transmitter.
3. First, if the cover of the switch is installed, please remove it from the switch. Next, use the appropriate wrench to loosen and remove the sleeve of the switch. Then, carefully release the clip on the switch PCB board. Finally, remove the FPC cable.

1. Take out the switch from the inside of the transmitter.
2. Insert the switch to be replaced (with the switch cover removed) into the fixing hole that secures the switch from the inside of the transmitter. Next, release the clip on the switch PCB board and insert the FPC cable connector into the clip. Then, secure the clip and make sure the FPC cable is secured. Finally, use a wrench to tighten the switch sleeve and put on the switch cover.
3. Tighten the 8 screws that secure the back cover, and then install the grips one by one.

The transmitter can be charged in two ways: wired charging (USB charging) and wireless charging.

• Wired charging: The USB Type-C cable is connected to the power supply at one end and to the USB Type-C port of the transmitter at the other end.
• Wireless charging: Use the wireless charging dock to charge it (as shown in the figure).

Wired charging supports fast charging up to 18W, and wireless charging supports fast charging up to 12W, both of which will be shown as fast charging mode. If you use a fast charging charger that cannot be recognized by the transmitter, it will be shown as normal charging.

Note: When charging with the power off, tapping the transmitter screen will display charging mode information.

Notes:

1. Before the transmitter is turned on, the transmitter is connected with the computer via the USB Type-C cable. After the transmitter is turned on, a pop-up window will appear, indicating to select the USB function: "Charge" or "Online". If you choose "Charge", the transmitter does not communicate with the computer. If you choose "Online", the transmitter communicates with the computer, that is, FlySky Assistant or simulator software can be accessed.
2. By default, wired charging has priority over wireless charging, namely, if the transmitter is connected to both wireless charging and wired charging, wired charging is enabled and wireless charging is disabled.
3. Charging in a low temperature, battery capacity and cycle life will reduce.
4. Do not store for more than half a year. Charge at least once when storing for half a year, and charge the battery when storing for three months.
5. If the transmitter has the battery removed or the battery is in over-discharge protection, the transmitter cannot be turned on by connecting the power supply via the USB Type-C cable; it can be powered on by re-installing the battery or when the battery is charged to a usable state.

The LED (status indicator) is used to indicate the power and operating status of the receiver.

• Off: The receiver power is not connected.
• Solid on in red: The receiver is connected to the power supply and is working properly.
• Fast flashing: The receiver is in binding mode.
• Slow flashing: The transmitter which the receiver is bound to is powered off, the signal is lost or the receiver firmware is updating.
• Three-flash-one-off: The receiver has entered forced firmware update mode.

• TX battery icon: shows slow charging mode, normal charging mode, fast charging mode, battery full, or low voltage.
• Unlock icon: Tap this icon to lock the screen. Lock icon: Tap and hold this icon for 1 second to unlock the screen.
• Displays the currently selected model number and name.
• RX with a cross: The RF module is enabled, but the receiver is not connected (Note: The icon won't be displayed when the transmitter has bound with the receiver in one-way mode). Tap this icon, a pop-up menu will appear, then tap Yes to enter the Bind setting interface.
• Signal bars: Displays the signal strength (Note: This icon won't be displayed if a receiver connects the transmitter in one-way mode).
• RF with a cross: The RF module is disabled.

Display the real-time status of the channels.

Setup:

1. Tap Display servos.
2. Operate the control assigned to the channel.
3. Monitor the output value of the channel in the Display servos interface.
4. Click the back arrow to return to the previous interface.

The servo can be tested. When the function is turned on, the servos of all channels will move slowly and repeatedly. Please use caution when the function is activated if servos are connected.

Setup:

1. Tap the channel test icon to activate channel test mode. A prompt interface will appear; press Yes to start. When the test mode is active, all channels will slowly move through their entire range of motion.
2. Click the back arrow to return to the previous interface.

Used to search for a receiver that is powered on and bound with the transmitter in two-way mode. After tapping the search icon, the system will sequentially switch models to connect the receiver under this model.

Setup:

1. Power on the receiver.
2. Enter the Select model interface.
3. Tap the search icon on the right of the interface to automatically search for the receiver. A prompt window will appear. Press Exit to stop the search.
4. After the search process is completed, the green dot will move to the model corresponding to the receiver, indicating that the transmitter has connected to the receiver normally.

Notes:

1. The RF must be enabled.
2. To achieve this function, ensure that the receiver is only bound with one model of this transmitter, as duplicate models may not be searched.

Using the copy function, you can create a new model based on the data of the currently selected model. When setting up the new model, you can take advantage of this feature to duplicate the data from an existing model and modify different parts without having to go through the setup process again.

Setup:

1. Go to the Select model interface.
2. Tap the model that you want to copy.
3. Tap Copy and click Yes on the pop-up interface to complete. Afterwards, click the back arrow to return to the previous interface.

Note: After copying the model is finished, the new model is selected by default, which is the last one in the list.

To create a new model, up to 50 new groups of models can be created.

Setup:

1. Go to the Select model interface.
2. Tap New and click Yes on the pop-up interface to create a new model. Afterwards, click the back arrow to return to the previous interface.

Note: After creating the model is completed, the new model is selected by default, which is the last one in the list.

To set the selected model as the model currently in use.

Setup:

1. Go to the Select model interface.
2. Tap the model that you want to set.
3. Tap Select and click Yes on the pop-up interface to complete. The green dot will move to the selected model. Afterwards, click the back arrow to return to the previous interface.

To remove a model from the memory of the transmitter.

Setup:

1. Go to the Select model interface.
2. Tap the model that you want to delete.
3. Tap Delete and click Yes on the pop-up interface to complete. Afterwards, tap the back arrow to return to the previous interface.

Note: The model currently in use can not be deleted.

Use the [Model Combination] function to compile the desired models into a single combination. Assign an SW-type switch to this combination (only SW-type switches are valid).

For a two-position SW-type switch: Moving the switch down switches between models in the combination.

For a three-position switch: Moving the switch up switches to the previous model in the combination. Moving the switch down switches to the next model in the combination. The center position has no action.

Model switching via the assigned switch is enabled only while the currently active model belongs to the assigned model combination.

Setup:

1. Go to Select Model > Model Combination.
2. Setting the toggle switch: Tap the box in the upper-right corner to enter the Switch Setup page. To select a switch, you can either touch the corresponding switch icon on the screen or move the physical switch you wish to assign. Tap the back arrow to save and exit.
3. Setting toggle permission (when the receiver is connected): Check "Allow operation in the connected RX" to enable model switching even when the receiver is connected. Leave it unchecked and the switch will have no effect on model selection using the switch while the receiver is connected.
4. Creating a model combination: Tap [Combination Setting (Not Set)]; the initial state shows "Not Set". Select the models to be added. A confirmation box appears — tap [Yes]. A check mark appears beside each selected model. Repeat until all desired models are included. Tap the back arrow to save the combination.
5. The function is active only on the following screens: Main interface, Disp servos, Model, Basic, and System. From any of these pages, operate the switch and verify the on-screen model change to confirm the setting is correct.

Note: This function was added in version 3.0.25.

This function is used to quickly disable the Signal low and Telemetry loss alarm, effectively turning off signal-related alarms. It is recommended to use this function to disable the Signal low 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 (to enable, navigate to Main interface > (Basic) > Model Alarm).

Setup:

1. Go to the Model setup interface.
2. Tap Set as race mode, and the system will pop up a message indicating the setting is successful, meaning the relevant alarms have been disabled; tap OK to close the pop-up window. If you tap Set as race mode again, a pop-up message will indicate that the system is already in race mode; tap OK to close the pop-up window.

Set the functions controlled by each channel.

Setup:

1. Tap the function item that needs to be set and enter the next interface.
2. Tap the appropriate function.
3. If you need to customize a function, you can select Custom: (AUX.1) to enter the software pad interface and set an appropriate name; then click the 'Enter' key or the back arrow to return.

Note: The custom channel name should be defined separately for different languages.

To assign a specific control to each channel.

The controls that can be assigned are SWA to SWH switches, LSW (LS1 to LS4) logic switches, J1 to J4 sticks, VRA to VRE trim knobs, and TEL telemetry controls.

Setup:

1. Tap the control item you want to assign to enter the setting interface.
2. Tap the control on the interface or toggle the control on the transmitter to select it. Then the control assignment is completed.

Note: If you assign a logic switch or telemetry switch as a function control, you can only complete the assignment by clicking [LSW] or [TEL] on the interface, and then clicking the appropriate switch.

You can set the related parameters after the control assignment is completed. The parameters are different for different controls.

• For continuous type controls, you can select Normal, Reverse, Over and Under. Normal means that the corresponding control ratio changes from "−100% to 100%" when the control is moved from "down" to "up". It is conversely for Reverse. In other words, when the continuous controls are moved from "down" to "up", the corresponding control ratio changes from "100% to −100%". For Over (Up side) or Under (Down side), the control ratio only switches between −100% and 100%, and the middle area is the hysteresis area. Selecting Up side means the control ratio is 100% in the high position and −100% in the low position. For Under (Down side), it is the reverse.
• For switches named after SW characters, you can set Normal or Reverse. Normal means the control ratio is −100% when the control position is in the low position and 100% when the control position is in the high position (the neutral position control ratio in the 3-position switch is 0%). It is conversely for Reverse. In other words, the control ratio of SW switches is 100% in the low position and −100% in the high position.
• For logical controls, when the switch is in the ON state, the corresponding control ratio is 100%; when it is in the OFF state, the corresponding control ratio is −100%. By clicking on the LSW control on the interface, you can select logical switches LS1 to LS4 as controls in the pop-up window. After selection, you can view the current settings of the logical switches at the bottom button on the interface, and you can enter the logical switch settings interface by clicking that button to make modifications.
• For TEL telemetry controls, set the relevant parameters in the Telemetry control function, using the real-time values obtained as the control. By clicking on the TEL telemetry control on the interface, you can select TEL1 to TEL4 as controls in the pop-up window. After selection, you can view the current settings of the telemetry controls at the bottom button on the interface, and you can enter the telemetry control settings interface by clicking that button to make modifications.

Take VRA as an example. Setup:

1. Tap VRA, then click Normal or Reverse.
2. Click Over, then click the settings icon to enter the next interface. After selecting Down side or Up side, click + or − to adjust the Up-side and Down-side values to the desired point. Then, click the back arrow to return to the previous interface.

Notes:

1. You can click the conditions icon to choose to set only for the current condition or set for all conditions.
2. In the Control / Trim assignment interface, clicking the left and right shortkeys (functions already assigned) will have no effect.

To assign a trim button to each channel.

Setup:

1. Enter the Trim interface.
2. Tap the trim button on the interface or toggle the trim button you want to assign. Then the trim assignment is completed.

You can set the related parameters for the trim button after the trim assignment is completed. Trim mode and Trim rate can be set.

In the trim mode, you can select Normal, Cen Max (center MAX), H-Max (high-end MAX) and L-Max (low-end MAX).

• Normal means normal trimming (linear) operation.
• Cen Max means the maximum trim adjustment in the neutral position, and no trim adjustment in the lowest and highest positions.
• H-Max means when the function control is at the highest position, the trim adjustment is at its maximum; as the control approaches the lower end, the adjustment gradually decreases until it reduces to 0 at the lowest position.
• L-Max means when the function control is at the lowest position, the trim adjustment is at its maximum; as the control approaches the higher end, the adjustment gradually decreases until it reduces to 0 at the highest position.
• Trim rate: A total travel range of the channel that can be controlled by the trim knob. A negative value indicates the reverse.

Note: In all conditions, the settings for trim ratio are the same, as well as trim mode. If trim is not assigned, trim settings cannot be made, and the parameters that have been set will be retained.

Follow the steps below to set:

1. Tap Trim setting to enter the trim setting interface.
2. Click the option box on the right of Trim mode, and select the appropriate trim mode according to the description above.
3. Tap Trim rate and click + or − to adjust the trim rate value to the desired point. Then, click the back arrow to return to the previous interface.

Set the trim step value. You can set it for all conditions or for the current condition. It only supports one-time storage.

Backup and call setting for the TR1 trim button

Set the backup value for the TR1 trim button. Setup:

1. Tap TR1 to enter the setting interface, the previously set backup value is displayed in the Backup trim area.
2. Toggle the TR1 on the transmitter to a desired value.
3. Click Rebuild to set it to the backup value.
4. Click Call to call the backup value. Then click the back arrow to return to the previous interface.

Step value setting for the TR1 trim button

Set the step value for the TR1 trim button. Setup:

1. Tap TR1 to enter the setting interface.
2. Click Step Value, click + or − to adjust the value to the appropriate value. Then click the back arrow to return to the previous interface.

Trim adjustment setting for the TR1 trim button

Set the trim adjustment for the TR1 trim button.

1. Tap TR1 to enter the setting interface.
2. Click Trim adjustment and click Yes to adjust the condition. Then click the back arrow to return to the previous interface.

Note: When 'for all conditions' is activated, trim values in all conditions will call the current trim value, so please operate with caution.

For other settings, please refer to the relevant settings of TR1.

To enable or disable the transmit function, you have the option to do so. If you do not need the transmit function — for example, if the transmitter is working as a USB simulator — you can disable it through this function.

Setup: Click the check box next to Transmit. "√" means the function is activated.

Note: For safety, the RF function cannot be disabled if the receiver is connected to the transmitter.

Set whether to enable the transmit function at startup. If not checked, the system will enter the selection interface for enabling the transmit function after power-up; if checked, the system will bypass the selection and directly enable the transmit function at startup.

By default, the transmit function is set to be enabled at startup.

Setup: Click the check box next to RF set to be on by default. "√" means the function is activated.

Three RF modes: Built-in RF, External RF, Internal and external RF.

• Built-in RF: Default to this option. The transmitter powers the built-in RF module. Please note, if you have not selected an external RF module, you do not need to change the RF working status.
• External RF: If you wish to switch to an external RF module, you can select this feature option. It supports the Flysky FRM303 RF module and also RF modules that are compatible with PPM, CRSF, or CRSF2 protocols. After installation, the transmitter can power the external RF module, or you can also use a separate power supply to power the external RF module.
• Internal and external RF: Internal and external RF modules work simultaneously. Compatible with RF modules with PPM or CRSF protocols. After installation, the transmitter can power both internal and external RF modules simultaneously.

Setup:

1. Click RF working status to enter the setting interface.
2. Tap the appropriate RF, and the icon to the right of the selected item changes to a check mark.
3. Click the back arrow to return to the previous interface. The selected item is displayed after the RF working status.

Note: If the RF working status is set to "External RF", the default option is FRM303; if the RF working status is set to "Internal and external RF", the default option is PPM.

When the RF working status is set to External RF, the RF settings interface will include two additional options: External RF type and FRM303 RF setting. When set to Internal and External RF, the interface will include one additional option: External RF type.

Used to select an appropriate RF type as per the communication protocol of the receiver bound with the transmitter. This item is displayed under RF mode: External RF or RF mode: Internal and external RF.

FRM303 adopts the AFHDS 3 protocol and is compatible with classic edition and enhanced edition receivers; PPM for RF modules that use the PPM protocol, CRSF for RF modules that use the CRSF protocol, and CRSF2 for the Black Sheep RF module, which is compatible with the CRSF2 protocol.

Setup:

1. Click External RF type to enter the setting interface.
2. Tap the appropriate external RF type, and click Yes on the pop-up interface to finish. Then click the back arrow to return to the previous interface.

Note: When the external RF type is set to CRSF2 and successfully connected to the receiver, it is possible to obtain RSSI parameters and the current connected flight control parameters, which include flight control voltage, current, and battery capacity. The telemetry data can be set for alarms through Model Alarm > Custom alarm.

When the FRM303 RF module is used, you can utilize this function to set the RF type to FRM303. After setting, the RF buzzer alarm can be enabled or disabled in the FRM303 RF settings interface. Once the buzzer is enabled, the alarm will sound in cases of low signal or low voltage, as well as when the temperature is too high or too low. Additionally, three power versions are supported: the non-adjustable version, the 25mW to 1W version, and the 25mW to 2W version.

When using the FRM303 RF module, you must first establish a connection with the transmitter through the FGPZ03 adapter. Then, at the FRM303 RF module end, set the input signal to a 1.5M UART signal (closed-source protocol). The setup method is as follows:

1. To enter the input signal setup state, power on the FRM303 RF module while pushing and holding the FRM303 five-way button upward for more than 3 seconds but less than 9 seconds. At this point, the LED will be on in blue.
2. Push the Up key upwards or push the Down button downwards to switch the input signal. When the LED operates in a three-flash-one-off mode repeatedly, this indicates the correct input signal.
3. Press and hold the Center key for 3 seconds to save the settings.
4. Push the Left key leftwards to exit the signal setup state.

The FRM303 LED flashes slowly in blue, it means a matching signal has been received.

Note: Refer to the FRM303 manual for more information.

Buzzer alarm

To enable or disable the buzzer alarm, the alarm function triggers under the following conditions: when the temperature of the RF module is too high, when the external power supply voltage is too low, or when the signal is low.

Setup:

1. Tap FRM303 RF settings to enter the settings interface.
2. Tap Buzzer alarm. "√" means the function is activated. Click the back arrow to return.

Power regulation

The power adjustment interface varies depending on the different adjustable versions. Note that the power supply mode of the FRM303 RF module also affects the actual output power. That is, if the power setting exceeds the limit range, the maximum power within the limit range will be output. When the power is switched to a value other than 25mW, a popup prompt window will appear.

Setup:

1. Tap Power Regulation to enter the settings interface.
2. Tap an appropriate power item. Click the back arrow to return.

Note: When the External RF type is set to FRM303, the RF temperature and external RF voltage can be obtained. The obtained data can be set to alarm via Model alarm > Custom alarm.

If the RF type is set to PPM, the RF settings interface will display PPM setup options for configuring PPM signal-related parameters.

• Signal polarity: Defaults to positive, meaning a high voltage level is considered an effective signal. If some devices recognize a low voltage level as an effective signal, the signal polarity can be set to negative, meaning a low voltage level is considered an effective signal.
• Number of channels: Used to set the number of channels included in a PPM signal. By default, a PPM signal includes 8 channels, but the number of channels can be adjusted according to specific circumstances.
• Period: Refers to the time it takes to transmit a PPM signal. The standard period for an 8-channel PPM signal is 20ms. When using fewer channels, a shorter period can be set to reduce the time required to transmit the signal and thus decrease latency. However, adjusting the period can only shorten the duration of the idle time and does not shorten the duration of the effective signal. Therefore, reducing the period will not decrease the number of signal channels. If the number of channels increases such that the effective signal transmission time exceeds the period, the system will handle the signal with the minimum idle method, and the interface setting value will not change accordingly.
• Starting level: Used to identify the start index time of the PPM signal, with a default of 400us. Appropriate values can be set based on actual conditions, with a setting range of 100us to 700us.

Setup:

1. Tap Signal polarity to set the signal polarity, "√" means the signal is positive.
2. Tap Number of channels. Then click + / − to set an appropriate number of channels.
3. Click Period. Then click + / − to set an appropriate period value.
4. Tap Starting level and click + / − to set an appropriate value. Then click the back arrow to return to the previous interface.

This function is displayed when the transmitter firmware is the adjustable power version and the RF working status is set to Built-in RF or Internal and external RF.

This function is used to set the internal RF transmission power. It can be set to 25mW (14dBm), 100mW (20dBm), 250mW (24dBm) or 500mW (27dBm).

Setup:

1. Tap Built-in RF power to enter the settings interface.
2. Tap an appropriate power item. Then click the back arrow to return to the previous interface.

This function is used to put the transmitter into the binding state in order to bind with the receiver. Refer to 5.2 Binding for details.

Note: When the RF working status is set to External RF and PPM, CRSF, or CRSF2 is selected, this function item is not shown.

This function is used to adjust the transmitter to the bind state in order to bind with the receiver. Refer to 5.2 Binding for detailed bind operations.

Set the signal type output by the receiver connectors. The left side of this interface displays the configurable connectors, while the right side displays the available protocol options. Only the enhanced edition of the receiver supports outputting i-BUS2 protocol signals through the connector.

For the enhanced edition receiver: When not connected to a receiver, it defaults to showing 4 configurable Newport connectors; after connecting the receiver, it displays the Newport connectors supported by that receiver. The protocol types that can be set for Newport connectors include PWM, PPM, S.BUS, S.BUS-IN, i-BUS-IN, i-BUS-OUT, i-BUS2, or i-BUS2-IN. When set to i-BUS2-IN or S.BUS-IN, signal redundancy functionality can be achieved.

For the classic edition receiver: When not connected to a receiver, it defaults to showing i-BUS/Servo and CH1; after connecting the receiver, it displays the connectors that can be set for this receiver.

• Tap to select the Newport: NPA, NPB, NPC or NPD.
• The selectable output protocols include PWM, PPM, S.BUS-IN, S.BUS, i-BUS-OUT, i-BUS2, and i-BUS2-IN. Among them: i-BUS-IN connects to i-BUS sensors. i-BUS-OUT connects to an i-BUS serial bus receiver or other devices that recognize the i-BUS signal. i-BUS2-IN / S.BUS-IN are used to achieve signal redundancy functionality. i-BUS2 connects to i-BUS2 sensors or other devices that recognize the i-BUS2 signal.

Setup:

1. Tap Custom port protocol to enter the setting interface.
2. Tap the Newport you want to set, e.g. NPA. Then click the appropriate protocol.
3. Click the back arrow to return to the previous interface.

Note: Neither classic edition receivers nor enhanced edition receivers support the i-BUS-IN setting when connected to the transmitter in one-way mode. More notes are as below:

For enhanced edition receivers:

• For double receivers, you can set the type of output signals for the interfaces of the primary and secondary receivers separately. However, the secondary receiver does not support external sensors. Therefore, the interface protocol cannot be set to i-BUS-IN.
• The signal types that can be selected only once among all Newports: PPM, S.BUS, i-BUS-IN and i-BUS-OUT. If NPA is set as i-BUS-OUT, NPB, NPC and NPD can no longer be set to i-BUS-OUT.
• If i-BUS is selected for any Newport, i-BUS2 cannot be selected for any other Newport; if i-BUS2 is selected for any Newport, i-BUS cannot be selected for any other Newport. For i-BUS2 and PWM options, Newports can select them repeatedly.
• Two receivers / multi-receiver: The interface protocols for the primary and secondary receivers can be set separately. Please note that in multi-receiver mode, the interface protocol for the secondary receiver must be set before binding and cannot be changed after binding is completed.
• Once any Newport interface is set to i-BUS2-IN, other interfaces cannot be set to S.BUS-IN, and vice versa.

For classic edition receivers:

• For CH1, you can select PPM or PWM only. If the receiver does not support PPM signal output, the setting is invalid.
• For receivers with a SENS connector, i-BUS/Servo does not support i-BUS-IN.

Signal redundancy feature (i-BUS2-IN/S.BUS-IN)

When the Newport connector protocol of the receiver is set to i-BUS2-IN or S.BUS-IN, the receiver will have signal redundancy functionality. This allows the receiver to receive signals input through the i-BUS2-IN or S.BUS-IN protocol connectors, and after performing redundancy judgment, it can select to use these signals to control the device. This feature ensures that the controlled device can be operated by the signal with the lowest delay, the best signal quality, or the one that is not out-of-control.

Notes:

1. Enhanced edition receivers compatible with redundancy functionality include: car model receivers FGr4B, FGr8B, FGr12B, and FGr4D; and aerial model receivers FTr8B, FTr12B, Tr8B, and TMr. These receivers will have signal redundancy functionality after updating to firmware version V1.0.22 or later (refer to 7.10.12 About Receiver for receiver version information). Some receivers, like the FTr8B, can be updated through the firmware packaged with the transmitter; whereas others, such as the TMr, require firmware updates to be completed using FlySky Assistant (only versions 3.0 and later are supported, and firmware can be obtained from the official website www.flysky-cn.com).
2. Both receiver firmware versions that implement redundancy through i-BUS2-IN must be V1.0.22 or later; for redundancy implemented through S.BUS-IN, the firmware version of the receiver with redundancy capabilities must be V1.0.22 or later, while the other receiver can simply output S.BUS signals.
3. If the receiver does not support redundancy functionality, the related settings will be ineffective, and the Newport connector output will remain at default.

A receiver with redundancy functionality is denoted as RX1, and the other receiver as RX2. When RX1's Newport connector protocol is set to i-BUS2-IN and RX2's Newport connector protocol is set to i-BUS2, and these two Newport connectors are connected using a double-female Dupont jumper cable, with a maximum length of 1 meter, RX1 can receive the signals output from RX2's Newport connector.

• When RX1 and RX2 are bound with the same transmitter, signal redundancy judgment can perform packet-level redundancy. The redundancy judgment always outputs the most recent control signals, ensuring that device control uses the signal with the lowest latency.
• When RX1 and RX2 are bound with different transmitters, if RX1 fails to receive control signals and it is judged that RX2 has not lost control, RX2's signals will be used to output to the controlled device.

When RX1 (S.BUS-IN) is connected to RX2 (S.BUS), that is, after RX1's Newport connector protocol is set to S.BUS-IN, it can receive signals output from RX2's Newport connector set to the S.BUS protocol. In this case, the receiver does not have packet-level redundancy judgment.

If RX1 and RX2 are in a two-way communication state, and RX2 supports external sensors, these parameters can be viewed in the transmitter's Sensor interface, such as "RSSI-RX2".

When both RX1 and RX2 are judged to be in an out-of-control state, the system will output the corresponding Failsafe value according to RX1's Failsafe settings.

Application scenario for the signal redundancy functionality. The steps to set up signal redundancy features with RX1 and RX2 bound to a single transmitter are as follows:

1. Refer to the diagram to connect RX1 and RX2: Use a double-female header Dupont cable to connect RX1's NPD connector with RX2's NPA connector. Connect the controlled device to the connector of RX1.
2. Bind RX1 and RX2 separately: Enter the RX setting > Bind setting menu. Select Enhanced, then check the three options "Two way", "Mul RX", and "S-Tele". Bind RX2 as the primary receiver to the transmitter. Bind RX1 as the secondary receiver to the transmitter.
3. Set the Newport connector protocols for RX1 and RX2: Select RX setting > Custom port protocol > Set primary receiver port protocol > NPA, click on i-BUS2, and then click the back arrow to return. Select Secondary receiver port protocol > NPD, click on i-BUS2-IN and then click the back arrow to return.
4. View the related information in the Sensor functionality: Enter the Sensor function interface and scroll up and down to view the related information. If the interface displays information such as 'RX Voltage - RX1', it indicates that the setup is complete, and the signal redundancy feature can be activated.

Note: Before using Mul RX mode (which supports signal redundancy), the secondary receiver's Newport interface protocol and start channel must be configured in advance. Binding should only be performed after completing the configuration to ensure proper functionality.

For failsafe, the PL18 Ultra transmitter provides the following settings:

• To set the failsafe judgment time. The system supports setting the failsafe judgment time, and the default judgment time varies with different RC models.
• You can enable/disable the function of Startup reminder model failsafe is not set.
• Set to disable the signal output of i-BUS-out and PPM protocol connectors in case of out-of-control, i.e., no output at i-BUS-out & PPM connectors in case of out-of-control.
• You can set failsafe values channel by channel, there are four modes that can be set: 1) Not set (No output), 2) No output (the settings are only for some special models or specific flight control board detection ports), 3) Hold, and 4) Fixed value.
• To set all channels: With this function, you can set the output value for all channels that have been set to a fixed value in case of out-of-control.
• The failsafe function can be tested. The model can simulate an out-of-control, after which the transmitter will shut down RF output, and the model will enter a failsafe state, with all channels outputting according to the failsafe settings.

Setting recommendations:

1. Considering that the aircraft/glider can glide down without power, users can set the throttle to the lowest value or low idle speed, and the rest of the channels to smooth flight (or hovering).
2. The helicopter throttle is set to the lowest value, and the rest of the channels are set to smooth flight.
3. For multicopter settings, please refer to the relevant manual.
4. If the device connected to the receiver has requirements on the failsafe state setting, it can be set as required.

Note: The above suggestions are for reference only. The specific settings are subject to the actual flight conditions.

• Failsafe judgment time: entry for the failsafe time interface.
• Startup reminder model failsafe is not set: tap to enable or disable.
• Set i-BUS-out & PPM to no output: tap to enable or disable.
• Failsafe test icon.
• Channel list: tap to enter the setting interface of the corresponding channel.
• Set all channels: set the output value of all channels that have been set to a fixed value in case of out-of-control.

Failsafe test function

Used to simulate an out-of-control scenario; when the model goes out-of-control, the transmitter will shut down the RF transmission, causing the model to enter an out-of-control state. At this time, all channels will output signals according to their failsafe settings.

1. Tap the failsafe test icon, a popup window will appear. Press and hold for over 1 second, then the system will disable RF. After that, the receiver will output channel values according to the failsafe settings.
2. Release the icon, the RF will be enabled, and the connection will be restored.

Failsafe judgment time

Used to set the failsafe judgment time, the setting range is from 250ms to 1000ms. The default judgment time varies with different RC models. For airplanes, gliders, helicopters and multicopters, the default failsafe judgment time is 700ms, while for cars, ships, and robots, it is 300ms.

1. Tap Failsafe judgment time to enter the setting interface.
2. Click +/− to set the appropriate value, then click the back arrow to return.

Startup reminder model failsafe is not set

Used to check or uncheck the Startup reminder model failsafe is not set option. Note: If the "Startup reminder failsafe is not set" (System > General) function is enabled and all channels are in Not Set (No Output) status, a pop-up window will prompt that failsafe has not been set when the transmitter is turned on.

Setup: Tap the box to the right of the function; when it is not ticked (√), it indicates that the function is disabled.

Setting i-BUS-out & PPM to no output

This function is for i-BUS and PPM signals. After enabling Set i-BUS-out & PPM to no output, regardless of the setting of the failsafe, these two types of failsafe signals will always be set to no output. If the function is disabled, after losing control, you can set each channel individually: either to a fixed value or to retain the last output value. By default, this function is enabled.

Setup: If the check box to the right of the option is not ticked, it indicates that the function is disabled. After losing control, the failsafe value is output by channel: either a fixed value or maintaining the last output value.

Note: If Set i-BUS-OUT & PPM signal to no output is not selected and a channel is set to no output, the last value is output in case of out-of-control.

Setting a channel

This function allows you to set the output signal states for channels 1 to 18 individually. The available modes are:

• Not set (No output): This indicates that the failsafe of this channel has not been set.
• No output: This means that there is no output in case of out-of-control.
• Hold: This means the last channel value is kept in case of out-of-control.
• Fixed value: This means that you can set the failsafe output value by moving the control, then the value set will be output in case of out-of-control.

1. Tap to select the channel you desire to set and enter the next level interface.
2. Tap to select the desired function option. If the fixed value is selected, turn the stick (switch, knob or LSW) to the desired position and hold it, then click the back arrow to return to finish the settings.

Setting all fixed value channels

Used to set the output values of all channels that have been set to a fixed value in case of out-of-control.

1. Tap Set all channels, a prompt menu will pop up.
2. Move all controls corresponding to channels with fixed values and hold them if needed.
3. Tap Yes to finish.

Note: For the channels controlled by a control, please refer to the Func. assign section for details.

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 consider the servo's performance capabilities when making these settings.

The interface of this function may differ depending on bind modes. For enhanced edition receivers, the PWM frequency for each channel can be set separately, with the options including Analog servo (50 Hz), Digital servo (333 Hz), SR (833 Hz), SFR (1000 Hz) and Custom. If a classic edition receiver is bound, all channels are set together and cannot be set to SR (833 Hz) and SFR (1000 Hz).

PWM frequency – enhanced edition receiver

Set the PWM frequency after the transmitter is bound to enhanced edition receivers.

Setting a channel: Set the PWM frequency for each channel.

1. Tap a channel you desire to enter the setting interface.
2. Tap the appropriate item according to the actual servo. Then click the back arrow to return.
3. For Custom, click + / − to set an appropriate frequency value.
4. For Synchronized with RF, click the check box at the right. "√" means the function is activated, the PWM output will be synchronized with the timing of the (RF) radio signal reception.

Set all channels: Set the PWM frequency for all channels. Refer to the descriptions of Setting a channel for the setup.

PWM frequency – classic edition receiver

Set the PWM frequency after the transmitter is bound to classic edition receivers. For the setting of the PWM frequency, please refer to Setting a channel.

Description of the duration of the PWM effective pulse width

The relevant information provided below includes details such as the duration of the effective PWM pulse width corresponding to different PWM frequencies.

Notes:

1. If the Midpoint offset in the RX setting is set to Offset 1520, then the transmitter will output the channel value with an offset of 20us.
2. Although the channel range can be set from −150% to 150%, SR (833Hz) only supports the range of −130% to 130%. Namely, when the transmitter channel output is greater than 130% or less than −130%, the receiver will still output 130% or −130%.

There may be a voltage difference between the voltage detected by the receiver and the actual voltage of the battery. Use this function to set a calibration coefficient for the receiver to make the voltage displayed on the interface equal to the battery voltage, namely, the sum of the detection voltage and the calibration coefficient is equal to the voltage displayed on the interface.

The BVD voltage detection range is from 0 to 70V.

Notes:

1. This function is applicable to enhanced version receivers with BVD function, which must be in two-way communication with the transmitter.
2. Pay attention to correctly connecting the BVD cable and the anode and cathode of the battery as shown in the diagram.

Setup:

1. Make sure the transmitter and receiver are bound; connect the BVD harness to the receiver's BVD interface. Make sure the positive and negative terminals are connected to the positive and negative poles of the battery.
2. Tap BVD Voltage Calibration to enter the calibration screen.
3. Click + / − to tune to the measured voltage of the battery.
4. Click Calibrate to calculate the calibration factor by the current value and the sensor measured value, and the result will be sent to the receiver to calibrate the BVD detection function.

Notes:

1. This function calibrates the BVD voltage of the primary receiver. To calibrate the secondary receiver (double receivers), you have to calibrate the BVD voltage of this secondary receiver-to-be before you bind it to the transmitter.
2. Make sure the battery is properly connected during calibration. To ensure accurate calibration, the Current Value, in calibration, needs to be set to the battery's measured voltage value. Recalibrate if necessary.

Note: This function is not available for all receivers. For classic receivers, it is only available for the FGr4 and FTr10 receivers.

Set the receiver to function as a PWM converter to achieve PWM channel expansion. Once the setting is successful, the receiver will operate as a PWM converter, with the connector outputting PWM signals.

For the classic edition receiver:

• If set as a PWM converter through the i-BUS to PWM setting, its SENS connector should be connected to the receiver's i-BUS-OUT connector.
• If set as a PWM converter through the i-BUS2 to PWM setting, its SENS connector should be connected to the receiver's i-BUS2 connector.

For the enhanced edition receiver:

• If set as a PWM converter through the i-BUS to PWM setting, its NPA connector should be connected to the receiver's i-BUS-OUT connector.
• If set as a PWM converter through the i-BUS2 to PWM setting, its NPA connector should be connected to the receiver's i-BUS2 connector.

A receiver that has been set as a PWM converter can be switched back to a receiver by re-binding with the transmitter. Once the binding with the transmitter is successful, it can be used as a receiver normally.

• i-BUS to PWM / i-BUS2 to PWM: to configure it as a PWM converter with the i-BUS or the i-BUS2 protocol.
• Start channel: select the starting channel item. For example, setting it to 5 means that the transmitter's CH5 is output by the PWM converter (receiver) CH1.
• Servo freq: to set the PWM frequency for the PWM converter channels.
• Config: tap to enter the configuration interface.

Setup:

1. Enter the interface of Config RX as a PWM converter.
2. Tap Start channel or Servo freq, then click + / − to set an appropriate value. Then click Config, the configuring interface comes along.
3. Put the receiver into bind mode; after the LED status of the receiver changes from fast flash to slow flash, it indicates the configuration is finished. Then click the back arrow to return.

If you want to set the receiver as an i-BUS2 PWM converter, there are no settings such as Starting Channel. The i-BUS2 PWM converter, once set, can be configured through the i-BUS2 PWM Converter Settings menu.

Preview and set up the i-BUS2 devices detected by the transmitter (in the two-way binding state between the transmitter and the enhanced edition receiver), allowing you to view the names, connection connectors, and numbering information of each i-BUS2 device. Additionally, you can make different settings based on the connected i-BUS2 devices.

For example, when the transmitter detects an i-BUS2 HUB device, this settings interface will be accessed, and at this time, you can set the i-BUS2 HUB device to be used as a PWM converter (with the same functionality as when the receiver is set as a PWM converter). When an i-BUS2 RPM sensor is detected, you can set the number of propellers for the sensor; for details, see the corresponding description.

Notes:

1. i-BUS2 devices are only compatible with the AFHDS 3 enhanced edition receivers. The connection diagram is illustrated using the FS-iBS01 sensor as an example; the connection method for other i-BUS2 devices is the same.
2. The abbreviations for the Newports are NPA, NPB, NPC and NPD; the enhanced edition receiver supports up to 4 Newports.
3. i-BUS2 devices must be connected to the receiver's Newport connector, and the Newport connector protocol must be set to i-BUS2 through RX Setup > Custom port protocol.
4. For instructions on connecting i-BUS2 devices, please refer to the appropriate manual or documentation.

Setup: Tap i-BUS2 device to view the related information.

Interface description:

• The interface displays the i-BUS2 devices recognized by the transmitter. (i-BUS2 devices need to be correctly connected to the receiver connector that has been set to the i-BUS2 protocol.)
• The i-BUS2 HUB (FS-iBH07) signal only supports two levels of expansion (the connected device connector name is OUT). When the receiver has only one connector set as i-BUS2 protocol, the i-BUS2 HUB output port connected to this connector can be connected to an i-BUS2 HUB again. This HUB connector can still output an i-BUS2 signal and can be connected to the i-BUS2 device. For example, "- OUT1: HUB" indicates that the HUB is connected to connector 1 of the first-level HUB; "- -OUT7: RPM" indicates that the RPM sensor is connected to connector 7 of the second-level HUB. When the receiver has two or more connectors set to the i-BUS2 protocol, the signal has already been expanded by the receiver once. In this case, the i-BUS2 HUB output connected to the connector cannot be used to connect another HUB for expansion, but it can be used to connect other i-BUS2 devices. For example, "- -OUT1: HUB" indicates that the HUB is connected to connector 1 of the first-level HUB. "- -OUT4: RPM" indicates that the RPM sensor is connected to connector 4 of the first-level HUB.

Setting the i-BUS2 HUB as a PWM converter

When the transmitter detects an i-BUS2 HUB device, it is possible to set the i-BUS2 HUB device to be used as a PWM converter (with the same functionality as when the receiver is set as a PWM converter). Note: Currently, only the FS-iBH07 is supported.

1. Tap Config as converter to enter the settings interface.
2. Tap Config, in the pop-up interface click Yes, then tap OK to complete the setup, and the interface will automatically return to the i-BUS2 device settings interface.

Notes:

1. This feature item is only available when such i-BUS2 devices are connected.
2. The i-BUS2 HUB device connects to any of the NPA–NPD connectors (custom port protocol set to i-BUS2) of the enhanced edition receiver and establishes a connection with the transmitter.
3. If the i-BUS2 device connector is already connected to other devices, after being configured as a PWM converter, the i-BUS2 HUB will disconnect from the devices previously connected to it.

i-BUS2 PWM converter setting

Set up the i-BUS2 PWM converter's related functions, allowing you to configure the PWM converter as an i-BUS2 expander, set the PWM frequency for the converter connector, and define the channels for output on the converter connector.

• Set as i-BUS2 HUB: to set the converter as an i-BUS2 HUB.
• Keep up with Channel PWM Frequency: to set the PWM frequency for the PWM converter channel.
• OUT channels: enter the output channel settings interface.

Setting as i-BUS2 HUB: To set the PWM converter back to the i-BUS2 HUB.

1. Tap Converter settings to enter the setting interface.
2. Tap Set as i-BUS2 HUB, so as to set the PWM converter back to the i-BUS2 HUB.

Note: If the converter is configured by a receiver, the setting will prompt a failure. The receiver does not support being used as a HUB.

Synchronous channel PWM frequency settings: To set the output PWM signal frequency of the converter connector. Setup: Tap Keep up with the channel PWM frequency, a pop-up process prompt interface appears, and once completed, the interface displays a completion message.

Setting output channel: Configure the output channels for the converter's various connectors.

1. Tap the channel you want to set, and enter the settings interface.
2. Tap an appropriate item. Then click the back arrow to return.

i-BUS2 GPS sensor setting

This function is applicable to the GPS module of the i-BUS2 protocol. Through this function, you can set the standard time zone, perform gyroscope level calibration, and view the GPS parameter display interface to get relevant information.

Note: Refer to the FS-iBG01 GPS sensor manual for correct sensor connection.

GPS display: To display the information returned by the GPS sensor. Setup: Tap GPS settings to enter, then you can view the related information. Click the back arrow to return.

1. Indicates whether positioning is successful: blue signifies successful positioning, while gray indicates a failure in positioning.
2. Displays the number of satellites reported back by GPS. Note: When the number of displayed satellites is beyond 10, GPS positioning accuracy is high; otherwise, there is a risk of positioning errors.
3. Azimuth angle: The direction of the model relative to the zero point. The green dot moves on the dial according to the direction, indicating the current model's bearing from the starting point. The center of the bearing angle represents the starting position, and the power-on location is the default starting point.
4. Displays latitude and longitude, distance, altitude, elevation, and speed information. The top shows the latitude and longitude of the position when the distance is zeroed, and the bottom shows the real-time latitude and longitude of the RC model's position. Speed is the model's relative velocity to the ground, altitude is the model's height relative to the ground, and distance is the distance from the model's current position to the starting point.
5. Displays the assigned switch controls; zeroing switch assignment entry.
6. Zero set: Click to set the distance value and altitude value to zero, which sets the current location as the reference point for measuring distance and height.
7. Heading angle: Indicates the real-time heading angle of the model in motion.
8. Attitude angle: The vertical movement of the center represents the model's pitch angle, while the rotation of the outer ring represents the model's roll angle.
9. Displays the date and time, with the date shown in the format of year/month/day and the time displayed in a 24-hour format.

UTC selecting: To set UTC.

1. Tap UTC select to enter the setting interface.
2. Tap an appropriate time zone. Then click the back arrow to return.

Gyroscope calibration: Calibrate the gyroscope. Before calibration, please connect the GPS sensor to the device correctly and make sure the device is placed horizontally.

1. Tap Gyro calibration to enter.
2. Tap Calibration. The system will calibrate automatically.
3. When calibration succeeds or fails, the system displays a pop-up screen indicating the success or failure of calibration. Click OK on the prompt screen to return to the previous screen.

Note: This function was updated in version 2.2.18.

i-BUS2 RPM sensor setup

When the transmitter detects the i-BUS2 RPM sensor, the device list will display 'RPM' along with the connected Newport connector. At this time, you can set the number of propellers of the i-BUS2 RPM sensor. Note: Refer to the FS-iBS01 RPM sensor manual for correct sensor connection.

1. Tap Number of Propellers to enter the setting interface.
2. Click + / − to set an appropriate number of propellers. Then click the back arrow to return.

Note: The number of propellers can be set from 1 to 12.

i-BUS2 current and voltage sensor setup

Used for resetting and calibrating current and voltage sensor-related information.

• Power on recovery data: check the box to automatically clear recorded data after powering on; if not checked, the data will not be cleared, including maximum and minimum voltage, maximum current, average current, battery consumption capacity, and operating time.
• Reset all data: clear all data, including maximum and minimum voltage, maximum current, average current, battery consumption capacity, and operating time.
• Reset limit value: clear limit value data, including maximum and minimum voltage, maximum current.
• Voltage cal: entry for the voltage calibration.

Note: Please refer to the voltage value measured by a multimeter for calibration.

1. Tap Reset and calib. to enter the function interface.
2. If you want to prevent recorded data from being automatically cleared after powering on: tap the box to the right of the function; if it is not checked, the data will not be cleared.
3. If you want to reset all data: tap Reset to the right of Reset all data, and then click Yes in the pop-up interface to complete.
4. If you want to reset extreme value data: tap Reset to the right of Reset limit value data, and then click Yes in the pop-up interface to complete.
5. Voltage calibration: Note that before calibration, connect the sensor's detection line correctly to the device to be tested. Click on Voltage cal to enter the calibration interface; click +/− to adjust to the actual measured voltage of the battery; click Calibration, the system prompts that the calibration is successful, click OK to complete.

i-BUS2 hydraulic sensor setup

When the transmitter detects the i-BUS2 hydraulic sensor, the device list will display 'Hydraulic Sensor' along with the connected Newport connector. Used for resetting and calibrating hydraulic sensor-related information.

Notes:

1. Refer to the FS-iBP01 hydraulic sensor manual for correct sensor connection.
2. Refer to the hydraulic value detected by the pressure gauge for calibration.
3. The hydraulic sensor must detect a hydraulic value greater than 0.5 MPa to perform the calibration function.

1. Tap Hydraulic Cal to enter the function interface.
2. Calibrate the hydraulic value: Use + / − to adjust to the hydraulic value measured by the pressure gauge; click Calibration, the system will prompt that the calibration is successful, then click OK to complete.
3. If you need to reset the hydraulic value: Click the reset icon on the bottom right of the interface, and then click Yes in the pop-up interface to complete.

Note: This function was added in version 3.0.25.

This function is used to set the external device that supports the i-BUS protocol, and it currently enables compatibility with serial bus receivers and voltage sensors.

Serial bus receiver FS-CEV04 setting

After the setting is completed, the FS-CEV04 can convert the i-BUS signal to a PWM signal and output the PWM signal.

Setup:

1. Make sure the transmitter and the receiver are bound.
2. Connect the FS-CEV04 to the SERVO port of the receiver.
3. Connect a servo to one of the C1–C4 ports of the FS-CEV04.
4. At the transmitter side, navigate to the i-BUS setup function, which is located within the RX settings. Select the channel you want to assign. If you click on the wrong channel, click Cancel to undo your selection. The system will display a pop-up window, "Press the corresponding key on the serial bus receiver to assign".
5. Press the corresponding button. Once the channel assignment is successful, a pop-up window will appear. If the assignment is successful, the channel number and interface number will be displayed.
6. Repeat these steps to set up additional channels. If the i-BUS receiver module is overloaded, please power it separately to prevent damage to the wiring due to excessive current.

i-BUS FS-CVT01 voltage sensor calibrating

A calibration factor can be set to correct the voltage values reported by the i-BUS voltage sensor FS-CVT01. This calibration factor is stored in the transmitter and should be re-calibrated whenever the battery type is changed.

Refer to the following schematic diagram to connect the i-BUS voltage sensor.

Notes:

1. For the enhanced edition receiver, before connecting the sensor to the receiver, you need to set the output signal type for NPA (Newport A) to i-BUS-IN via the function: Basic > RX setting > Custom port protocol.
2. The system only supports one Newport connector set to i-BUS-IN; at the same time, the other Newports cannot be set to i-BUS2.

Setup:

1. Insert the positive and negative wire pins into the plugs of the detected battery respectively. The red wire is the positive pole. Make sure that the positive and negative poles are connected correctly.
2. Tap i-BUS calibration FS-CTV01.
3. According to the voltage value of the actual device, click + / − to set the appropriate voltage value.
4. Click Calibrate and click Exit once calibration is completed.

Through this function, you can select a channel to output the signal strength value of the receiver. Once the function is enabled, the selected channel does not perform the output of the transmitter's corresponding channel function; instead, it will output the receiver's signal strength value. This function is necessary for users who operate traversers with FPV glasses. We recommend selecting CH14 or any auxiliary channel for this purpose. You can make corresponding adaptations in the flight control settings to view the signal strength information on your FPV glasses.

Setup:

1. Tap Select output channel to enter the setting interface.
2. Tap an appropriate channel. And it will automatically return.

Note: The function is disabled by default.

This is designed for some servos with a midpoint value identified as 1520. Usually, the transmitter assigns the channel midpoint value of 1500 to the receiver. After the selection of offset, the transmitter will output the channel value to the servo by superimposing 20. When you use standard S.BUS protocol devices such as the Vbar gyroscope flight control, this function can be set to Offset to achieve the midpoint offset for all channels.

Setup:

1. Tap Midpoint offset.
2. Tap an appropriate function item. And click the back arrow to return.

To update the firmware of the receiver. The PL18 Ultra transmitter packs the firmware of FTr8B, FTr12B etc. The packed firmware varies with different firmware versions. If the receiver is not compatible with the transmitter or an unexpected error occurs, then it is necessary to upgrade the receiver's firmware. This can also be done via FlyskyAssistant. Please note that this function is applicable for FlyskyAssistant firmware versions 3.0 and later.

Setup:

1. The transmitter and the receiver have bound normally.
2. Tap Receiver Update to enter and select the receiver you want to update.
3. Click Update, then click OK in the pop-up window to put the receiver into updating mode.
4. After the updating is completed, it will automatically return to the previous interface.

Note: If the receiver firmware is the latest version, the system will display a prompt reminder and there is no need to update.

To put the receiver into forced updating mode first, then follow the steps above to update. The methods of entering forced mode vary with the models; refer to the manual of the receiver for details. Take the FTr8B receiver as an example to show how to put it into forced updating mode.

• Press and hold the Bind key on the receiver for over ten seconds while powering on the receiver, then release the Bind key after the receiver LED works in a flash-three-one-off state repeatedly.
• Power on the receiver first, then press and hold the BIND button for more than 10 seconds; the LED of the receiver will be in a state of three-flash-one-off, then release the BIND button.

To view the information of the receiver connected.

Setup: Tap About Receiver and view the information.

Note: If double receivers are connected to the transmitter, the information of the primary receiver is displayed.

This list displays information for all connected sensors, including their type, number, and real-time readings.

Note: The following sensors can have their function parameters set through this feature: altitude sensors FS-CAT01 (i-BUS), FS-iBA01 (i-BUS2), and the barometric altitude sensor built into the INr6-HS receiver; speed sensors FS-CPD01 (i-BUS), FS-CPD02 (i-BUS), and FS-iBS01 (i-BUS2).

(1) Display sensor ID

• The ID number 0 represents the transmitter.
• The ID number 1 represents the receiver or the primary receiver (two receivers connected), and its related information, such as signal strength, RSSI, Noise, or SNR.
• The ID number 2 represents the secondary receiver, and its related information, such as signal strength, RSSI, Noise, or SNR.
• For i-BUS2 devices, the numbering is automatically assigned by the firmware after the device is connected. If the number of connected devices or the custom interface protocol settings for the i-BUS2 interfaces change, the device numbering may be reassigned. Note that the i-BUS2 GPS sensor's number is fixed at 1 and will not be reassigned due to the aforementioned changes. For i-BUS devices, the numbering starts from 3 and increments, allowing for a maximum of 15 i-BUS type sensors to be connected.

(2) Display sensor type

• TX Voltage: To display the voltage of the transmitter's battery.
• RX Voltage: To display the power supply voltage of the receiver.
• Signal strength: To display the signal strength between the transmitter and the receiver. It is calculated by using SNR. The signal strength will be displayed as a value between 0 and 100. When the value drops below 60, shorten the control range promptly to avoid out-of-control. In the same environment, the farther the distance, the smaller the value. If the signal strength is less than or equal to the set threshold, the system will trigger a low signal alarm as configured.
• RSSI: To indicate the power of the signal received by the receiver. 0 to −40dBm: Indicates that the distance between transmitter and receiver is close and the communication quality is best. −40dBm to −85dBm: The communication quality is good. Less than −85dBm: Indicates that there is an obstacle between the transmitter and receiver or the distance is far. Please shorten the control distance to avoid losing control.
• SNR: The signal-to-noise ratio refers to the decibel difference between the signal and the noise received by the receiver. The signal-to-noise ratio equals the data of RSSI minus the data of Noise, which is a decisive parameter in the overall quality of the signal. If the SNR drops below 11, reduce the range quickly to prevent loss of control.
• Noise: Noise is generated due to interference from other nearby transmitters such as Wi-Fi. In places where there are too many transmitters, excessive noise will affect the radio-controlled distance.

Note: The suffix '-RX1' in the 'Type' column indicates information related to the redundant function receiver (RX1), which is transmitted back to the transmitter by the other receiver (RX2) that works in conjunction with RX1 to achieve redundancy. The suffix '-RX2' indicates information related to the other receiver (RX2), which is transmitted back to the transmitter by the redundant function receiver (RX1).

(3) Display the data returned by a sensor

This list displays data in real-time. When a sensor connects to the receiver, the list updates to include the new sensor's type and details. Conversely, when a sensor disconnects, the list removes the type and data associated with that sensor.

Notes: For the FS-CTM01 temperature sensor (i-BUS): Attach the FS-CTM01 to an appropriate location (e.g., motor, battery casing) using double-sided sponge tape, ensuring it is in close contact with the surface of the object being tested. Connect it to the receiver's SENS connector or Newport (i-BUS-IN). You can then view related information through the Sensor function. For the FS-iBT01 temperature sensor (i-BUS2): Please refer to its manual for correct sensor connection. After connecting the sensor correctly, you can view related information through the Sensor function.

This feature is used to set parameters related to barometric altitude sensors and rotational speed sensors (RPM).

• Altitude sensors can be calibrated to set a zero altitude and support the use of a height zeroing switch for calibration.
• Rotational speed sensors can monitor the motor's RPM and speed.

Height sensor setup

Set the parameters for the altitude sensor. For the FS-iBA01, please refer to the manual for installation before setting up. For the FS-CAT01, follow the steps provided below for installation.

Installation steps:

1. Securely attach the FS-CAT01 sensor using double-sided soft tape.
2. Connect the FS-CAT01 sensor to the Newport connector of the FTr8B receiver.
3. Go to (Basic) > RX setting > Custom port protocol to set the Newport connector connected to the sensor as i-BUS-IN.
4. Go to (Basic) > Sensor. If the sensor displays Height data, then installation is complete. If not, repeat the above steps.

• Please choose: displays the sensor and its current value; the sensor entry is shown here. After selecting the sensor, the relevant sensor information is displayed, such as name, serial number, real-time values, etc.
• Zero Altitude: displays the altitude value during zero calibration.
• Hg zero: sets the current sensor altitude to the height zero point.
• --: displays the assigned zeroing switch and is the switch assignment entry.

Setup:

1. Tap Choose sensor to enter the next level interface; tap the appropriate sensor, then click the back arrow to return.
2. Tap Hg zero to set the current sensor's elevation as the zero point for height.
3. Click on -- to enter the switch assignment interface; tap the interface switch and select the on or off position, then click the back arrow to return.

Note: The altitude sensor measures changes in air pressure to map them as changes in elevation. Changes in airflow can cause some errors in the monitoring.

RPM sensor setup

Set the parameters for the RPM sensor. For the FS-iBS01, please refer to the manual for installation before setting up; for the FS-CPD01 and FS-CPD02, follow the steps below for installation.

FS-CPD01: magnetic induction speed module

1. Place the sensor next to the magnet, which is fixed to the spinning part of a model such as the gear of a helicopter. Note: Make sure that the sensor is within 2mm of the magnet and the north pole or south pole of the magnet is parallel to the sensor.
2. Connect the FS-CPD01 sensor to the Newport connector of the FTr8B receiver.
3. Go to (Basic) > RX setting > Custom port protocol to set the Newport connector connected to the sensor as i-BUS-IN.
4. Go to (Basic) > Sensor. Try rotating the gear; if the RPM value changes, it indicates successful installation; otherwise, please reconnect according to the steps mentioned above.

Note: RPM means the sensor is testing the speed of the motor. 0rpm is the speed measurement value.

FS-CPD02: optical induction speed module

1. Securely attach the sensor and the reflective sticker to the axial rotation position. Note: Keep the reflective sticker flat and perpendicular to the sensor, and keep the proper distance between the sensor and the sticker.
2. Connect the FS-CPD02 sensor to the Newport connector of the FTr8B receiver.
3. Go to (Basic) > RX setting > Custom port protocol to set the Newport connector connected to the sensor as i-BUS-IN.
4. Go to (Basic) > Sensor. Try rotating the propeller; if the RPM value changes, it indicates successful installation; otherwise, please reconnect according to the steps mentioned above.

Please note when you set the gear ratio: if you want to detect the propellers, the gear ratio is the ratio of 1 to the number of propellers. Note: The number of propellers for the FS-iBS01 (i-BUS2) sensor can be set through RX Setting > i-BUS2 Device settings feature.

• Please choose: displays the sensor and its current value; the sensor entry is shown here. After selecting the sensor, the relevant information is displayed: Correct RPM, Travel speed, and Mileage.
• Motor pole pairs: shows and configures the number of motor pole pairs.

Setup:

1. Tap Please choose to enter the next level interface; tap the appropriate sensor, then click the back arrow to return.
2. Tap the function box to the right of Motor pole pairs, and click +/− to set the number of magnetic pole pairs.
3. Tap the function box to the right of Gear ratio, and click +/− to set the appropriate gear ratio.
4. Tap the function box to the right of Wheel CR, and click +/− to set the appropriate wheel circumference.
5. Click on -- to enter the switch assignment interface; tap the interface switch and select the on or off position, then click the back arrow to return.

Notes:

1. The system calculates speed based on the wheel circumference and the monitored rotational speed, and then combines this with time to calculate the distance traveled. Therefore, the settings for gear ratio and circumference will affect both speed and distance.
2. The gear ratio is the ratio of the number of teeth on the gear that is actually being monitored to the number of teeth on the gear that is targeted for monitoring.
3. When it is inconvenient to install a sensor on the device with the desired rotational speed, you can try testing the rotational speed of the transmission parts and setting an appropriate gear ratio to monitor the speed of this device. For example, by monitoring the rotational speed of the propeller blades to monitor the speed of the shaft.
4. For wheeled vehicle models, you can set the wheel circumference and combine it with the rotational speed value of the wheel to determine the vehicle's travel speed.

Note: This function was updated in version 3.0.25.

Used to display and set data recording information.

You can define 4 recording objects, which can be set as "sensor data", "output channels", or "stick or knob". After recording is enabled, it can record the value changes of the recording objects over a period of time.

• Record Object: entry for the recording object settings interface.
• The horizontal axis displays the recording time, and the vertical axis shows the value range of the recorded objects. Different colored curves represent different recording objects. Note: If the recording does not fill a full page, the latest recording position is displayed as a vertical line.
• Page counter: displays the total number of pages of recorded data and the current page number. Note: When the data recording exceeds one page, after turning off the recording function, you can swipe left or right to view different pages.
• Record toggle: enables the recording function switch — on or off. Entry for the Record start/stop switch, which shows the status of the switch; you can start or stop the data record function.
• Record reset button: tap to clear all recording data. Displays the assigned record reset switch; entry to the record reset switch assignment interface.
• Zoom in and zoom out icons: tapping them adjusts the length of the time axis displayed on one page; 1x indicates that the entire duration of the recording is displayed on one page, while 10x indicates that 1/10 of the duration is displayed on one page.
• The list displays the set recording objects; tapping can toggle whether this curve is displayed in the coordinate system, with a "√" indicating that the recording object is shown.

Setup:

1. Tap Data Record to enter.
2. To enable/disable the data recording feature, click the toggle, or assign a record start/stop switch to enable/disable the data recording feature: Tap the switch icon to enter the switch assignment interface. Then tap Record start/stop switch to enter, and tap the interface switch and select the on or off position. Simply toggle the corresponding physical control to make the selection. Click the back arrow to return.
3. Setting the record reset switch: Tap the switch icon to enter the switch assignment interface. Then tap Record reset switch to enter, and tap the interface switch and select the on or off position. Click the back arrow to return.
4. Tap Record Object to enter the setting interface. To set the length of time, click the box to the right of the length. You can set the duration to 3 minutes (50Hz) or 30 minutes (5Hz). Tap the box to the right of the curve you want to set to enter the settings interface, and click the recording object you need according to your actual requirements. If the recording object is set to a sensor, you can set its value range: click the 'Value Range' area to the right of the curve to enter the next level interface; you can set the minimum and maximum values, and click +/− to set the appropriate numbers. Then click the back arrow to return.

Note: To record the Correct RPM and Travel speed of an RPM sensor, you must first select the sensor through Calculate sensor.

Note: This function was updated in version 3.0.25.

Timer 1 and Timer 2 have the same function. Only one timer setting method is introduced below.

1. Tap to select the timer.
2. Displays the current time. Click repeatedly to toggle the start/stop timer.
3. Tap to select the timing method.
4. Tap to select the reminder mode.
5. Tap the box next to M (minute) or S (second). +/− will appear. Then click +/− to set the appropriate time.
6. Tap Reset to reset the time during the timing process.

Setup:

1. Tap Timer 1.
2. Tap Up to switch the timer type.
3. Tap the function box next to M or S, + or − will appear. Then, click + / − to adjust the value to the desired point.
4. Tap Sound to scroll through the reminder mode.
5. Click the switch icon and set the switches for Start switch, Stop switch or Reset switch. You can start, stop or reset the timer by the switches. Then click the back arrow to return to the previous interface.

Notes:

1. The timer start/stop switch is an action switch. If no stop switch is assigned, the start switch will act as the timer stop switch from its start to end. If two timers need to start at the same time and stop at different times, you can assign different stop switches to them. You can also switch the start/stop by clicking the display timer area of the interface. This function is very useful for electric glider competitions.
2. When Timer 1 or Timer 2 is set to remind, the system will send out a reminder when it reaches exactly on the minute. It will also send out a countdown reminder 30 seconds before the end of that time period.

Turn on the timer by setting the throttle trigger value, and then calculate the operating time of the throttle after the trigger value is reached.

Setup:

1. Tap Engine timer.
2. Click + / − to set an appropriate trigger value. If the throttle exceeds the set value and this function is activated, the timer will start.
3. Tap Reset to reset the accumulated time if needed.
4. Tap the toggle to enable the function. Then click the back arrow to return.

Note: You need to activate this function manually, as it is disabled by default.

To calculate the total working time of the model; it is disabled by default.

Setup:

1. Tap Model timer.
2. Click the toggle to enable this function, then click it again to disable it.
3. Tap Reset, and then click Yes on the pop-up interface to reset the accumulated time. Then click the back arrow to return.

You can set up alarm functions for throttle and switch position, as well as the specific locations for the alarms.

• Throttle alarm: for RF enabling, it is used to set the safety judgment and alarm for the throttle main control (J3) position. The default is down-position safety. Always safe: No alarm action. Mid safe: If the J3 position is not at the mid position, execute an alarm. Down safe: If the J3 position is not at the down position, execute an alarm.
• Switch alarm: sets the safety judgment and alarm for the switch position when RF is enabled. Default is Custom.

Setup:

1. Tap Throttle alarm. You can switch between Always safe, Mid safe, and Down safe.
2. Tap Switch alarm. You can switch between Custom and Always safe. After selecting Custom, click on Switch alarm settings to enter the next level interface. Click on the appropriate switch. Then click the back arrow to return.

Notes:

• The throttle alarm function only detects whether the J3 control's position is at the lowest position.
• If J3 is not assigned as a throttle control or is used in a special mode, please consider whether to select the alarm based on its actual use.

You can set the alarm voltage, battery type, low voltage alarm value, ultra-low voltage alarm threshold, and alarm sensitivity. Once set, if the battery voltage of the related device drops below the specified alarm voltage, the transmitter will trigger a voice alarm, providing 'Low Voltage' or 'Ultra-Low Voltage' voice prompts to warn the user.

• Alarm voltage: setting entry.
• Alarm switch: displays the assigned switch; entry for assigning the alarm enable switch. The toggle is used to enable or disable the feature.
• Battery Type: setting entry.
• Low voltage / Ultra-low voltage: tap to select the value to set.
• Alarm sensitivity: the alarm is triggered after the battery voltage remains below the set alarm voltage for a duration defined in the settings.

Setup:

1. Tap Alarm voltage to enter the next level interface. Set the appropriate function item based on the actual device, then click the back arrow to return.
2. Tap Battery Type to enter the next level interface. Choose the suitable battery type based on the actual device's voltage type, and then click the back arrow to return.
3. Tap the Low voltage or Ultra-low voltage alarm function item. Set the appropriate voltage alarm value based on the actual device's voltage by clicking +/−.
4. Set the Alarm Sensitivity. Tap +/− to set the appropriate threshold value. The threshold value is displayed in the function box to the right of 'Alarm sensitivity'.
5. To disable the alarm function, tap the toggle to disable the alarm. Alternatively, assign a switch to control the alarm: Tap the box to the right of 'Alarm switch' to enter the switch settings interface. Tap the interface switch and select the on or off position, and then click the back arrow to return.

Notes:

1. For enabling and disabling the sound function, please refer to 14.1.3 Sound.
2. If selecting BVD voltage, the receiver must have a BVD connector and use the BVD detection line to measure the BVD voltage.
3. If two receivers are bound, the receiver voltage alarm setting is for the voltage of the primary receiver.

Note: This function was updated in version 3.0.25.

This function is used to configure the alarm feature for signal strength during two-way communication between the transmitter and receiver. It allows you to set the alarm object, alarm type, and alarm switch. Additionally, you can specify the alarm signal strength threshold, enable or disable repeated alarms, and set the time interval for repeated alarms.

• Alarm object: setting entry.
• Alarm type: alarm sound setting entry and alarm vibration type setting entry.
• Alarm switch: the toggle is used to enable or disable the feature; displays the assigned switch, entry for assigning the alarm enable switch.
• Range: maximum signal strength limit for alarm enable.
• Repeated: set whether to repeat alarms and the interval time for repetition.
• Reset icon: tap to restore to default settings.

Setup:

1. Tap Alarm object to enter the next level interface. Click the appropriate function item according to the actual situation, and then click the back arrow to return.
2. To set the alarm type, tap the corresponding box to the right of 'Alarm Type' to enter the sound or vibration settings interface. Tap the appropriate sound or vibration function item, and then click the back arrow to return.
3. Set the alarm signal strength threshold. Tap +/− to set the appropriate threshold value. The threshold value is displayed in the function box to the right of 'Range'.
4. Set whether to repeat alarms and the interval time for repetition. Tap the function box to the right of 'Repeated'. Tap to toggle whether to repeat and how often to repeat.
5. To disable the alarm function, tap the toggle to disable the alarm. Alternatively, assign a switch to control the alarm: Tap the box to the right of 'Alarm switch' to enter the switch settings interface. Tap the interface switch and select the on or off position, and then click the back arrow to return.

If the receiver's signal strength drops below the set threshold, the transmitter's LED will flash and trigger a low signal alarm as configured.

Notes:

1. If the alarm sound (System > General > Sound > Alarm sound) and vibration (General > Vibration) are turned off, the alarm sound and vibration set here will not trigger any notifications.
2. Enabling the Set as race mode function will automatically deactivate the assigned alarm activation switch, necessitating manual reconfiguration.

Used to set up the alarm function for telemetry loss when the transmitter and receiver communicate in two-way mode. It allows you to set the alarm object, alarm type, and alarm switch. Additionally, you can specify the alarm sensitivity threshold.

Setup:

1. Tap Alarm object to enter the next level interface. Click the appropriate function item according to the actual situation, and then click the back arrow to return.
2. To set the alarm type, tap the corresponding box to the right of 'Alarm Type' to enter the sound or vibration settings interface. Tap the appropriate sound or vibration function item, and then click the back arrow to return.
3. Set the alarm sensitivity. Tap +/− to set the appropriate threshold value. The threshold value is displayed in the function box to the right of 'Alarm sensitivity'.
4. To disable the alarm function, tap the toggle to disable the alarm. Alternatively, assign a switch to control the alarm: Tap the box to the right of 'Alarm switch' to enter the switch settings interface. Tap the interface switch and select the on or off position, and then click the back arrow to return.

After setting the alarm function, when the receiver's telemetry loss time exceeds the set duration, the transmitter's LED will flash and trigger a telemetry loss alarm as configured.

Notes:

1. If the alarm sound (System > General > Sound > Alarm sound) and vibration (General > Vibration) are turned off, the alarm sound and vibration set here will not trigger any notifications.
2. Enabling the Set as race mode function will automatically deactivate the assigned alarm activation switch, necessitating manual reconfiguration.

You can customize alarm targets and their parameters. For example, you can set an alarm to trigger when 'Sensor Data', 'Output Channel', or 'Stick or Knob' is within a specific range. The system supports setting up to 5 groups of custom alarms.

• Alarm object: setting entry.
• Alarm type: sound or vibration setting entry.
• Alarm switch: the toggle is used to enable or disable the feature; displays the assigned switch, entry for assigning the alarm enable switch.
• Alarm method: to set the alarm method.
• Range: to set the range.
• Repeated: set whether to repeat alarms and the interval time for repetition.

Setup:

1. Tap Custom alarm1 to enter the next level interface.
2. Tap Alarm object to enter the next level interface. Tap Sensor Data, Output Channel, or Stick or Knob to enter the next level interface, and select the appropriate function item.
3. To set the alarm type, tap the corresponding box to the right of 'Alarm Type' to enter the sound or vibration settings interface. Tap the appropriate sound or vibration function item, and then click the back arrow to return.
4. To set the alarm method: Tap the function box to the right of 'Alarm method' to switch between alarm methods: one triggers an alarm within a set value range (i.e., when [a ≤ x ≤ b]); the other triggers an alarm outside the set value range (i.e., when [x ≤ a, x ≥ b]).
5. Tap the function box to the right of 'Range'. Tap +/− to set the appropriate alarm value.
6. Tap the function box to the right of 'Repeated'. Tap to toggle whether to repeat and how often to repeat.
7. To enable/disable the alarm function, tap the toggle to turn it on; or assign a switch to turn it on/off. Tap the box to the right of 'Alarm Switch' to enter the switch settings interface. Tap the interface switch and select the on or off position, and then click the back arrow to return.

Note: If the alarm sound (System > General > Sound > Alarm sound) and vibration (General > Vibration) are turned off, the alarm sound and vibration set here will not trigger any notifications.

Note: This function was updated in version 3.0.25.

When the transmitter is set to Student, it only supports the functions of Student Mode. At this time, you can match the transmitter in Trainer Mode by setting the student control switches, configuring the PPM output of the Trainer Jack, and binding the wireless trainer unit functions, thereby realizing the application of trainer functions.

Trainer mode: To switch between Trainer mode and Student mode. Setup: Click Trainer Mode repeatedly to switch between Trainer or Student.

Student control: Toggle the switch for whether the student accepts control. This switch is usually effective only when Trainer control is set to off in trainer mode. Setup: Click Student control to enter the switch assignment menu and set the appropriate button. Refer to chapter 16 in this manual.

Note: Under normal circumstances, make sure that the student control switch is enabled. In this case, the student signal can be sent to the trainer transmitter. Usually, the switch can be set to "--" and normally ON. Please refer to chapter 16 for the switch setting. When the trainer uses the student mode to remotely assist the student to practice, the control authority can only be switched through this switch if the control authority needs to be switched. For details of application scenarios, see the later section.

PPM output setting: Set the type of PPM signal output from the Trainer Jack, including settings for signal polarity, channel number, period, and start level. Refer to 7.9.6 PPM setup for the description of the setup.

Binding with FS-WTM01: If two transmitters are connected using a wireless trainer unit, the student mode transmitter will establish a connection with the trainer mode transmitter through the Binding with WTM01 feature.

1. Tap Binding with WTM01 to put the transmitter into binding mode.
2. Power on the wireless trainer unit and it will enter binding mode. The LED of the wireless trainer unit is solid on after the binding is successful.

Notes:

1. After switching models, it is necessary to re-bind the wireless trainer unit; the receiver that was bound under the previous model will also need to be re-bound the next time it is used.
2. When binding, ensure that the operating mode of the wireless trainer unit is matched. For specific details, refer to the user manual.

When the trainer mode is set to Trainer, it indicates that the transmitter only supports the functions of the trainer mode. At this point, by adjusting the trainer control switch and input channels, etc., the transmitter can be matched with the student mode transmitter to implement the application of trainer functions.

Trainer mode: Switching between trainer mode and student mode. By default, it is set to student mode. Setup: Click Trainer Mode to switch between Trainer and Student.

Trainer control: The trainer control switch must be OFF before the external signals can be used to control the model. Setup: Tap Trainer control to enter the switch assignment menu and set the appropriate button. Refer to chapter 16 in this manual.

Note: Under normal circumstances, the trainer uses the trainer mode to teach remotely. If you want to use the student mode to teach remotely, the trainer mode control switch must be OFF.

Setting the input channel: Assign the channel signals from the student transmitter to correspond to the functions of controlling the model.

1. Tap input CH1–CH18 channels to enter the corresponding setting screen.
2. Tap Control object to enter the control object setting screen. Tap Stick or Knob to enter the control object setting screen and select the appropriate stick or knob. Tap Basic Function to enter the setting screen, and select the appropriate function item; this item is only available for aircraft models. Tap Output Channel to enter the setting screen and select the appropriate function item.
3. Tap Mix mode to enter the setting screen. Select Not mixed or Mixed. Not mixed means the model is fully controlled by the student transmitter; Mixed means the signals from both the student transmitter and the trainer transmitter are combined before outputting. Note that the transmitter not involved in control should ensure that the controls are in the neutral position.

• Stick or Knob: the channel signals output from the student transmitter will be processed by all the functions corresponding to the stick/knob on the trainer transmitter.
• Basic function: the signals output from the student transmitter will be processed by the basic function of the trainer transmitter.
• Output Channel: the signals output from the student transmitter will be processed by the output channels of the trainer transmitter.

Notes:

1. If the control object is set to a stick/knob, the external input signal will be treated as the stick/knob value and applied in the function that executes control channel changes. For example, when Stick or knob is assigned to J3, if J3 is assigned to the throttle in the function assignment of the trainer mode transmitter, or if other functions are also assigned to J3 as a control, the student mode transmitter can then control the corresponding function.
2. If the control object is assigned to a function, the external input can be used as the primary control value for the function.
3. If the control object is assigned to a channel, the external input signal is used as the channel value, and in this case, the mixing control and trim of the trainer mode transmitter will be ineffective.

About FS-WTM01: Used to view the information of the wireless trainer unit which is connected with the transmitter. Setup: Click About WTM01 to view the information.

Instructions for trainer-assisted training usage:

1. This transmitter supports the assignment of switches to control whether the student's radio control signals are sent to the trainer mode transmitter when set to student mode. Additionally, the trainer mode transmitter can automatically switch to trainer control based on anomalies in the student's radio control signals (such as signal loss).
2. Based on this principle, when conducting trainer-assisted training, the student should set their transmitter to trainer mode and assign the channels corresponding to the trainer control signals, while keeping the trainer control switch in the normally closed position; the trainer should set their transmitter to student mode and assign a switch to control the student's signals.
3. During use, the trainer can toggle the switch to disable the student's control authority, allowing the student to focus on practicing with the RC model while the trainer observes from the side. When the trainer determines that the student needs assistance, they can take over control by switching the switch.

To rename the condition selected.

Setup:

1. Tap Rename to enter the editing interface.
2. Tap the characters that you want to use; the system supports up to ten characters. Then click the back arrow or Enter to return.

To set a switch to switch among the conditions.

Setup: Tap Set switch to enter the switch setting interface. Tap the related switch and the status. Then click the back arrow to return.

Notes:

1. Condition 1 is the default condition and does not support switch settings; that is, the serial number of the default condition is 1.
2. After the transmitter is turned on, the system will automatically judge whether the switch for condition 8 is on or off. If it is on, it will operate in condition 8. If it is not on, the system will judge whether the switch of condition 7 is on or off. If it is on, it will operate in condition 7. The system continues this process in sequence.

To create a new condition.

Setup: Tap New/Copy and a pop-up screen will appear. Click Yes to complete. Then click the back arrow to return.

To delete a condition selected.

Setup:

1. Tap a condition you want to delete.
2. Click Delete and a pop-up screen will appear. Click Yes to complete. Then click the back arrow to return to the previous interface.

Note: If there is but one group of condition, you cannot delete it, namely there is no Delete function item.

Changes the order of the conditions so as to change the priority. The condition corresponding to serial number 5 has the highest priority, and number 4 is the next highest priority. The system works in this way according to this sequence.

Setup:

1. Tap to select a condition.
2. Click << to move the condition selected forward. Click >> to move the condition selected backward.

Set the curve type.

1. Enter the rate setting interface. Tap 'EXP2' repeatedly to toggle among the selections.
2. Tap [SYMM] to switch between Line and SYMM.

Set the related Rate, EXP and Offset after a line type has been set. Take the Rate setting as an example.

1. Enter the setting interface.
2. Set the rate value: Tap Rate A. Click + or − to set an appropriate rate value.

For the setting of EXP and Offset, refer to the setting of Rate.

Set the related settings of Master and Slave.

Master selection: Set the related settings of Master. Master can be set as either a control or a function.

1. Tap the function box next to Master to enter.
2. If you want to set Master to a control, tap 'Stick, Knob, TEL' to enter. Then tap the desired control or knob you want to set. After that, click the back arrow to return.
3. If you want to set Master to a function, tap Func. (function) to enter. Then tap the desired function you want to set. Then click the back arrow to go back to the previous interface.

For Slave, you can only set it to a function; for the function setting of Slave, please refer to the descriptions of Master above.

Master trim: Set the related trim settings of Master. Setup: Tap the function box below Master Trim. You can repeatedly click to toggle between Off or On.

Note: When the trim is set to On, Master trim changes will also affect Slave. When it is set to Off, Master trim changes will not affect Slave.

Master Link/Slave Link: The link can be set for Master and Slave, when Master is set to a specific function. The Link is to set whether the master function will affect the slave function when it is affected by other mixes. Slave Link is to achieve the result of this group of mixers used as a source of link for other mixes to select this group of slave functions as its master.

Setup: Tap the function box below Master Link. You can repeatedly click to toggle among NOR (normal), REV (reverse) or OFF.

Note: NOR (normal) refers to a forward call, and REV (reverse) refers to a reverse call. When Master Link is set to OFF, other function mixing volume will not affect Slave.

Take the link setting between Mix1 and Mix2 as an example:

Note: When Master is set as a control, the Link and Trim functions are disabled, that is, the Link and Trim items will not appear.

Set the delay time for the current condition from triggering to taking effect for Open delay or Close delay of the Mix. If the Mix delay needs to be set for other conditions, switch to other conditions prior to settings.

Setup:

1. Tap Open delay or Close delay.
2. Click + or − to set the appropriate value. Then click the back arrow to return to the previous interface.

Set the mix rate for the channel for the current condition. If configuring other conditions, first switch to the target condition before applying new settings.

1. Point: click to set the line type: [Point], [EXP1], or [EXP2].
2. Add / Delete: add or delete points. The green highlighted point is the currently selected point. Maximum points supported: up to 11 points. You cannot add a new point in the following situations: there are already 11 points; the currently selected point is the last point, or a point already exists 5% to the right of the currently selected point. Minimum points supported: at least 3 points are required. You cannot delete a point in the following situations: there are only 3 points remaining; the currently selected point is either the first or the last point.
3. << / >>: switch points. The number indicates the sequence number of the currently selected point.
4. Pos: displays the current X-axis coordinate value (computed source data).
5. Rate: displays the current Y-axis coordinate value (channel output value).

The function takes Multi-Point as an example, with the curve type set to [EXP1] or [EXP2]. For the function configuration, please refer to section 8.3.2 (Ratio/Exponent/Offset Settings) of the manual.

Setup:

1. To add points (default is 3 points): Tap [Add] to add a new point. Tap [Pos], then tap [+]/[−] to set the position value (X-axis coordinate of the point). Tap [Rate], then tap [+]/[−] to set the ratio value (Y-axis coordinate of the point). Refer to the first three steps to continue adding points.
2. To delete points: First, tap << / >> to select the point to be deleted. The selected point will be highlighted in green. Then tap [Delete] to remove the selected point.
3. Tap the return icon to go back.

If the models are the multi-aileron, multi-elevator or multi-flap structure, you can set the mix through the aileron, flap and elevator mix functions when the mixes are required for aileron, elevator and flap.

Note: This function was updated in version 2.2.18.

This feature can reduce the output speed of some main functions (such as aileron, throttle, rudder, spoiler, etc.). The easing times for start (In speed) and recovery (Out speed) can be set separately, achieving variations in the duration of the easing by having different speeds for start and recovery.

After setting the delay for the master function, all channel outputs associated with this function will be eased. If the Pro. Mixes use this main function as the master, the slave in the same group will also be eased. For example, if you set the aileron function delay time to 2 seconds, the corresponding slave outputs for the aileron functions such as Aileron to Elevator, Aileron to Rudder and other mix functions will also change gradually.

1. In speed: tap to select; the shorter the time, the faster the speed.
2. Out speed: tap to select; the shorter the time, the faster the speed.
3. Type: tap to toggle between Line and Sym. (symmetry). Sym. means the neutral (ratio 0%) is the reference point. Line means the low end (ratio: smallest value) is the reference point.

Note: Recovery refers to the value change from far from the reference point to close to the reference point, which is output by Out speed. Start refers to the value change from close to the reference point to far from the reference point, which is output by In speed.

Setup:

1. Tap the item you want to set to enter.
2. Tap the function box next to In speed, then click + or − to set the time.
3. Tap the function box next to Out speed, then tap + or − to set the time.
4. Tap the function box next to Type. You can repeatedly click to toggle between the items. Then, click the back arrow to return to the previous interface.

This can reduce the output speed of channels (such as CH1, CH2, etc.). The easing for start and recovery can be set separately, that is, the easing time can be changed by different start and recovery speeds.

You can use this function if you want to simulate the movement of a real aircraft or make up the mechanical virtual position of the servo. After setting the easing time, all the volumes output from this channel execute the easing.

Setup:

1. Tap the item you want to set to enter.
2. Tap In speed, then click + or − to set the appropriate time.
3. Tap Out speed, then click + or − to set the appropriate time.
4. Tap the function box next to Type. You can repeatedly click to toggle between the items. Then, click the back arrow to return to the previous interface.

This can reduce the output speed of channels which is changed by condition switching.

You can use this function for some special flights which need a smooth transition. For example, when changing the model from NOR mode (Normal Mode) to 3D mode (Aerobatic Mode) the aircraft attitude must be switched by a smooth transition.

Setup:

1. Tap the item you want to set to enter.
2. Tap In speed, then click + or − to set the appropriate time.
3. Tap Out speed, then click + or − to set the appropriate time.
4. Tap the function box next to Type, then click the back arrow to return to the previous interface.

The left and right ailerons of the aircraft or glider can be adjusted independently. Differential aileron adjustment can be achieved by setting different high and low rate values for each aileron.

Take the setting of Low as an example. Setup:

1. Tap the item corresponding to Low you want to set.
2. Click + or − to set the appropriate value. Then click the back arrow to return to the previous interface.

For the setting of High, refer to the setting of Low.

Set the elevator with the aileron function to improve the model's roll performance. Only aircraft with two-elevator tails support this function. You can set the high and low rate values of the two elevators to move with the aileron function.

Take the setting of Low as an example. Setup:

1. Tap the item corresponding to Low you want to set.
2. Click + or − to set the appropriate value. Then click the back arrow to return to the previous interface.

For the setting of High, refer to the setting of Low.

This mixing function is used to set the linkage between the camber flap and the aileron, allowing the flap to operate in conjunction with the aileron and thereby enhancing the maneuvering characteristics around the longitudinal axis.

Note: This function is only available for models with 2 or 4 flaps.

Take the setting of Low as an example. Setup:

1. Tap the item corresponding to Low you want to set.
2. Click + or − to set the appropriate value. Then click the back arrow to return to the previous interface.

For the setting of High, refer to the setting of Low.

This mixing function is used to set the linkage between the brake flap and the aileron so that the flap can work together with the aileron, thus improving the maneuvering characteristics around the longitudinal axis.

Note: This function is only available with 4 flaps.

Take the setting of Low as an example. Setup:

1. Tap the item corresponding to Low you want to set.
2. Click + or − to set the appropriate value. Then click the back arrow to return to the previous interface.

For the setting of High, refer to the setting of Low.

Usually, more lift is needed on ailerons when turning or rolling. This function allows you to set the compensation rate for the elevator during aileron movement. As a result, the elevator will undergo a compensatory trim according to the set rate during aileron movement, thereby preventing the aircraft from nosing down.

Note: If the model structure is a tailless (flying wing) aircraft, the aileron can be used as an elevator. This setting will affect all elevator surfaces, and even the aileron surfaces in case of a tailless aircraft.

Take the setting of Low as an example. Setup:

1. Tap the item corresponding to Low you want to set.
2. Click + or − to set the appropriate value.
3. Set a switch to enable this function. Tap the box next to Start switch to enter the switch assigning interface, and configure a switch to enable. Then click the back arrow to return to the previous interface.

Note: For settings of the switch, refer to the descriptions in chapter 16.

For the setting of High, refer to the setting of Low.

This mix function is used to set the linkage between the rudder and the aileron. This function can be set to achieve more coordinated and flexible steering and roll through the compensatory trim of the rudder during the aileron movement.

Note: When there are two rudders, rudder 1 and 2 will both be affected.

Take the setting of Low as an example. Setup:

1. Tap the item corresponding to Low you want to set.
2. Click + or − to set the appropriate value.
3. Set a switch to enable this function. Tap the box next to Start switch to enter the switch assigning interface, and configure a switch to enable. Then click the back arrow to return to the previous interface.

Note: For settings of the switch, refer to the descriptions in chapter 16.

For the setting of High, refer to the setting of Low.

This function is used to set the high and low end rates and offset of flaps separately; for a model with multiple flaps, the upward and downward travel and neutral position of each flap can be adjusted independently.

The number of flap function items in the interface is related to the Wing set in Model, as shown in the diagram with an example of 4 flaps.

Take the setting of Low as an example. Setup:

1. Tap the item corresponding to Low you want to set.
2. Click + or − to set the appropriate value. Then click the back arrow to return to the previous interface.

For the setting of High and Offset, refer to the setting of Low.

This mixing function is used to set the high and low rates for the brake flap to the airfoil flap. It is used to independently adjust the up and down travel of multiple flap servos.

Note: This function is only available for models with 4 flaps.

Take the setting of Low as an example. Setup:

1. Tap the item corresponding to Low you want to set.
2. Click + or − to set the appropriate value.
3. Set a switch to enable this function. Tap the box next to Start switch to enter the switch assigning interface, and configure a switch to enable. Then click the back arrow to return to the previous interface.

Note: For settings of the switch, refer to the descriptions in chapter 16.

For the setting of High, refer to the setting of Low.

This mixing function is used to establish the linkage between the airfoil flap and the elevator. It allows you to set a compensatory trim for the elevator to prevent the aircraft from diving when the airfoil flap is used for deceleration.

Note: For models with normal tail / V tail / Ailvator (double elevator) tails, the function item is only Elevator/Elevator 2. For those having ailerons but without tail (there is no elevator function item; the number of aileron function items is subject to the actual number of ailerons), set the aileron as the elevator, so as to use the Airfoil to Elevator function.

Take the setting of Low as an example. Setup:

1. Tap the item corresponding to Low you want to set.
2. Click + or − to set the appropriate value. Then click the back arrow to return to the previous interface.

For the setting of High, refer to the setting of Low.

This mixing function is used to set the linkage between the brake flap and elevator. You can set a compensatory trim for the elevator to prevent the aircraft from diving when using the brake flap for deceleration.

Note: This function is only available for models with 4 flaps.

Take the setting of Low as an example. Setup:

1. Tap the item corresponding to Low you want to set.
2. Click + or − to set the appropriate value. Then click the back arrow to return to the previous interface.

For the setting of High and Offset, refer to the setting of Low.

Set the parameters related to the brake speed function. You can set the time to complete the action when the brake is enabled and disabled. The longer the time, the slower the speed.

Take the setting of Offset 1 brake as an example. Setup:

1. Tap Offset 1 brake.
2. Click + or − to set the appropriate value. Then click the back arrow to return to the previous interface.

For the setting of Offset 2 brake and Stop braking, refer to the setting of Offset 1 brake.

Set the offsets of AILE, Flap, Spoiler and Elevator for the current condition. To set in another condition, you need to switch the condition first.

Take the setting of Offset 1 brake of AILE as an example. Setup:

1. Tap the function box corresponding to AILE.
2. Click + or − to set the appropriate value. Then click the back arrow to return to the previous interface.

For the setting of the offset value of other functions, refer to the description above.

This mixing function is used to adjust the rise and fall rates of the left and right elevators separately.

Take the setting of Low as an example. Setup:

1. Tap the function box corresponding to Low you want to set.
2. Click + or − to set the appropriate value. Then click the back arrow to return to the previous interface.

For the setting of High, refer to the description above.

This mixing function is used to set the linkage between the elevator and aileron. For models with an elevator, the elevator can be linked to the aileron to move in the same direction, thereby increasing lift. For models without a tail, the ALE2 (aileron 2) master control can be used to link the aileron to move in the same direction, achieving the rise and fall function.

Note: This function item is not available for single-aileron models. For multi-aileron models, the number of aileron function items is subject to the actual number of ailerons.

Take the setting of Low as an example. Setup:

1. Tap the function box corresponding to Low you want to set.
2. Click + or − to set the appropriate value. Then click the back arrow to return to the previous interface.

For the setting of High, refer to the setting of Low.

This mixing function is used to set the linkage between the elevator and airfoil flap. When this function is enabled, the elevator or ALE2 (aileron 2) master control of the model will affect the airfoil flap proportionally, thus increasing the lift of the model.

Note: For tail-less aircraft, aileron 2 is used instead of the elevator.

Take the setting of Low as an example. Setup:

1. Tap the function box corresponding to Low you want to set.
2. Click + or − to set the appropriate value.
3. Set a switch to enable this function. Tap the box next to Start switch to enter the switch assigning interface, and configure a switch to enable. Then click the back arrow to return to the previous interface.

Note: For settings of the switch, refer to the descriptions in chapter 16.

For the setting of High, refer to the setting of Low.

This mixing function is used to set the linkage between the elevator and brake flap. When this function is enabled, the elevator/aileron 2 master control of the aircraft model affects the brake flaps at the set rate, thus increasing the lift of the aircraft model.

Note: This function is only available for models with 4 flaps. For tail-less aircraft, aileron 2 is used instead of the elevator.

Take the setting of Low as an example. Setup:

1. Tap the function box corresponding to Low you want to set.
2. Click + or − to set the appropriate value.
3. Set a switch to enable this function. Tap the box next to Start switch to enter the switch assigning interface, and configure a switch to enable. Then click the back arrow to return to the previous interface.

Note: For settings of the switch, refer to the descriptions in chapter 16.

For the setting of High, refer to the setting of Low.

This function is applicable to models with winglets, and is used to adjust the winglet rudder angle. The winglets are used to solve the wingtip vortex problem, thus reducing the induced drag and improving efficiency. The winglets are usually symmetrically erected vertically at both wingtips or extended outward at a certain angle.

Winglets increase the effective aspect ratio without significantly increasing the wing load and weight. Although the induced drag can be effectively reduced by extending the wing, this will also increase the parasitic drag and wing load strength at the same time, resulting in an insignificant gain. The winglets can effectively increase the aspect ratio without increasing the wingspan.

Note: This function is available for models with Tailless-2RUD.

Take the setting of Low as an example. Setup:

1. Tap the function box corresponding to Low you want to set.
2. Click + or − to set the appropriate value. Then click the back arrow to return.

For the setting of High, refer to the description above.

This mixing function is used to set the linkage between the rudder and the aileron. It is used to adjust the rate at which all control surfaces affecting the airfoil change according to the airfoil. You can adjust with the two sides (Up/Down), and meanwhile you can correct the effect of these control surfaces on the direction of flight.

Take the setting of Low as an example. Setup:

1. Tap the function box corresponding to Low you want to set.
2. Click + or − to set the appropriate value.
3. Set a switch to enable this function. Tap the box next to Start switch to enter the switch assigning interface, and configure a switch to enable. Then click the back arrow to return to the previous interface.

Note: For settings of the switch, refer to the descriptions in chapter 16.

For the setting of High, refer to the description above.

This mixing function is used to set the linkage between the rudder and elevator. This function is used when it is necessary to realize the linkage between the elevator and rudder, correcting the offset in the pitching direction when the aerobatic model aircraft is turning and flying laterally. For tailless aircraft, AILE2 (aileron 2) is used to replace the elevator to achieve the elevation function.

Take the setting of Low as an example. Setup:

1. Tap the function box corresponding to Low you want to set.
2. Tap + or − to set the appropriate value.
3. Set a switch to enable this function. Tap the box next to Start switch to enter the switch assigning interface, and configure a switch to enable. Then click the back arrow to return to the previous interface.

Note: For settings of the switch, refer to the descriptions in chapter 16.

For the setting of High, refer to the description above.

You can choose the language from English and Chinese.

1. Tap Language to enter.
2. Tap an appropriate language. Then click the back arrow to return.

Choose the units to use for length and temperature. For Length, you can select between the metric and imperial systems, with the default being Metric. For temperature, you can choose between Celsius and Fahrenheit, with the default being Celsius.

Setup: Tap Units to enter and click an appropriate item. Then click the back arrow to return.

Turn on or off the System sound, the Alarm sound, or the ON/OFF sound.

1. Tap Sound to enter.
2. Tap an appropriate item you want to set. "√" appears and indicates the sound is turned on.
3. Click +/− to change the volume of the sound. Then click the back arrow to return.

Set whether the vibration function is enabled and the level of the vibration intensity.

1. Tap Vibration to enter.
2. Tap an appropriate item you want to set. Then click the back arrow to return.

Note: The vibration status and the intensity of the vibration will be displayed synchronously on the General interface.

Set to check or uncheck the Startup reminder failsafe is not set.

Setup: Tap the box to the right of the function; when it is not ticked, it indicates that the function is disabled.

Note: If the function is turned off, the 'Startup reminder model failsafe is not set' function is unchecked and all channels are in Not Set (No Output) status, a pop-up window will not prompt that failsafe has not been set when the transmitter is turned on.

When Power on auto search receiver is checked and the RF is turned on, you can make settings to automatically switch to the model corresponding to the currently powered-on receiver. This is the same as the Searching for the receiver function in Model Select.

Setup: Tap Power on auto search receiver, a "√" will appear, indicating that the feature is turned on.

Reset the transmitter to its factory default state; all data, including model data and system settings, will be reset.

1. Tap Factory reset and click Yes on the pop-up screen to enter the Wizard screen.
2. Follow the wizard to finish setting these functions, then the transmitter will reset to its factory default mode. After completing the Stick Mode, ST Cal, and Update RF functions in sequence, you can simply click Start using.

Update the transmitter's firmware. In case of updating the firmware of the transmitter, use this function to put the transmitter into updating mode first, then upgrade the transmitter's firmware.

1. Download the latest firmware, then open it.
2. Connect the PC and the PL18 Ultra transmitter via the USB Type-C cable.
3. Tap TX firmware update via (System) > General; a pop-up screen will appear. After that, click Yes to put the transmitter into updating mode.
4. On the PC side, click Update to start.
5. The transmitter will power on again when the updating process is completed. Then remove the USB cable and close the firmware.

Notes:

1. The firmware of the transmitter can also be updated by FlyskyAssistant. In such a case, make sure the transmitter is connected to the PC only.
2. If more than one firmware is opened at the same time, only one firmware can be recognized by the transmitter.

To view system information, including product model, firmware version, firmware release date, and hardware version, etc. The internal RF firmware can be updated via Update on this interface.

Setup: Tap About PL18 Ultra to view.

If the RF firmware version is mismatched due to reasons such as disassembly for repair, you can use this feature to update it. Click Update, and the system will pop up a prompt window. Then click Yes, and the transmitter will enter the RF module firmware update interface. After the update is complete, the system will automatically exit the update interface.

Adjust the brightness of the screen's backlight. Auto-brightness: once the Auto-brightness function is enabled, the ambient light brightness will affect the screen backlight brightness. Brightness: this indicates the current screen brightness level and allows for brightness adjustment.

1. Tap Backlight brightness to enter.
2. Tap +/− to set the appropriate value, and long press +/− to quickly adjust the screen brightness (brightness setting range: 1%–100%).
3. After checking Auto-brightness, a "√" will appear, and the ambient light will affect the screen brightness. If not checked, ambient light will not affect the screen brightness. Then click the back arrow to return.

Note: The backlight brightness affects the battery's endurance time; the higher the brightness, the shorter the standby time of the transmitter.

Change how long the screen takes to dim when not in use. The default is 30 seconds. If the display exceeds the set time, it will enter the backlight dimming state. You can set an appropriate time as desired.

1. Tap Backlight dims to enter.
2. Tap an appropriate item. Then click the back arrow to return.

Note: The longer the backlight dims time, the shorter the battery's endurance will be, and correspondingly, the shorter the transmitter's standby time will be.

Adjust the screen brightness to darken it based on the original brightness level; or turn off the backlight. Note: The backlight dims state depends on this function.

1. Tap Dimming brightness to enter.
2. Tap an appropriate item. Then click the back arrow to return.

Set whether to enable the idle alarm function and set the alarm time.

1. Tap Standby timeout to enter.
2. Tap an appropriate item. If you do not want to set an alarm time, click None. Then click the back arrow to return.

Note: If the transmitter is in dormancy mode, there will be no idle alarm.

You can set whether to enable or disable the dormancy function, as well as the duration time for dormancy. The transmitter will automatically enter dormancy mode when the following conditions are met:

1. The RF working status is set to Built-in RF;
2. "Two-way" is checked in the Bind setting interface;
3. The transmitter is not connected to a receiver;
4. No clicks on the transmitter display screen or operation of controls are made within the set "Dormancy" time;
5. The transmitter is not in the 'Online' state.

1. Tap Dormancy to enter.
2. Tap an appropriate item. If you do not want to set it, click None. Then click the back arrow to return.

Note: If the transmitter remains idle for the set dormancy time duration, the transmitter will display a pop-up warning that it is about to enter dormancy mode. After three beeps and an audio prompt saying "Enter dormancy", it will then enter dormancy mode.

Note: This function was updated in version 2.2.18.

If the function does not require switch control, it can be set to '--' with the state being set to either Open or Close. At this time, the function will be disabled or enabled. During the execution of the trainer function, the switch state of the student's transmitter can be adjusted through this feature.

1. Enter the switch assignment interface.
2. Click Open to toggle between Open or Close.
3. Click -- to cancel the switch if a control on the transmitter is assigned.

Note: Action switches do not support the setting of Normal ON or Normal OFF. On such a switch assignment interface, you can tap -- only to disable the switch assignment function; switches such as altitude zeroing in sensors, timer start/stop switches, etc.

For two-position and three-position switches, you can set any position to Open or Close.

1. Enter the switch assignment interface.
2. Tap the control name in the interface to select the switch, for example, SWD.
3. Tap Open or Close of any position to set the appropriate on or off status of this position.

Notes:

1. Except for SWH, all switches that start with 'SW' are position switches. SWH is a spring-return switch. It is recommended to set other position switches as either the ON or OFF switch for functions.
2. The switch assignment operations for the Timer and Sensor are the same as above. However, this switch function is an 'Action Switch'. That is, the action of switching from the 'OFF' position to the 'ON' position is a valid action, and this function operates as a one-time switch.

For continuous controls such as a stick or knob, the ON or OFF position can be set more flexibly according to different setting types.

1. The bar displays the switch state: green indicates ON, red indicates OFF, and yellow indicates HYS (hysteretic).
2. Line. / Symm.: tap repeatedly to toggle between Line. (linear) and Symm. (symmetric).
3. Hys. / Box: tap repeatedly to toggle between Hys. (hysteresis) and Box.
4. The triangle marks the present position of the control.
5. OFF: displays the position value of OFF. Tap to set the present position of the control to OFF.
6. ON: displays the position value of ON. Tap to set the present position of the control to ON.
7. Post. / Nega.: tap to switch between Post. (positive) and Nega. (negative) directions.

Linear/Symmetric mode

Line. means setting the ON or OFF position separately for the whole control travel. Symmetric means setting the ON or OFF position symmetrically for the upper part or the lower part with the neutral point as the reference. You can switch the ON or OFF position by Posit. (positive) or Reve. (reverse).

1. Enter the switch assignment interface.
2. Tap the control name in the interface to select the switch, for example, VRD.
3. Switch the type mode by tapping Line.
4. Turn the VRD to a suitable position, and tap the green function box to the right of "ON" to set this position to ON.
5. Turn the VRD to another suitable position, and tap the green function box to the right of "OFF" to set this position to OFF.
6. Click Posit. to reverse the switch status.

Hysteresis/Box mode

Hys. means setting the border for ON or OFF only. You can set the hysteresis interval (yellow) for the border. When the control position is in the hysteresis interval, the previous state is kept. Box has no hysteresis interval. You can set 2 border values for the on/off area. When the switch is outside this area, the switch state is opposite to the state inside this area. You can switch the ON or OFF position by 'Posit.' or 'Reve.'.

1. Enter the switch assignment interface.
2. Tap the control name in the interface to select the switch, for example, VRD.
3. Switch the type mode by tapping 'HYS.'.
4. Turn the VRD to a suitable position, and tap the green function box to the right of "ON" to set this position to ON.
5. Turn the VRD to another suitable position, and tap the green function box to the right of "OFF" to set this position to OFF.
6. Click 'Posit.' to reverse the switch status.

Note: If the mode is set to 'Box', the interface will display 'Up'/'DW'. The area between 'Up' and 'DW' is in the off state, while all other areas are in the on state.

Provides an interface for selecting logic switches. Users can preview the corresponding component switches and logical relations of logic switches, and by clicking the preview box, they can enter the logical switch settings interface to reset the logical switches.

1. Enter the switch assignment interface.
2. Click LSW and a pop-up screen will appear. Click the logic switch you want to set, then tap the preview area to enter the setting interface. Then you can set a new logic switch.

Note: The on/off of a logic switch enables or disables a function.

Provides an interface for selecting telemetry switches, with the ability to preview telemetry switch control values in real time, and the option to tap the preview box to enter the telemetry switch settings interface to reset the telemetry switches.

1. Enter the switch assignment interface.
2. Click TEL and a pop-up screen will appear. Click the telemetry switch you want to set, then tap the preview area to enter the setting interface. Then you can set a new telemetry switch.