A: You can distinguish T8FB(OTG) or T8FB(BT) from the label. Please check below pictures:

A: Their firmware and Parameter Adjustment APP are different.

If it is T8FB BT version, you can download the firmware and Parameter Adjustment APP from the below link:

 https://www.radiolink.com.cn/t8fb_bt_firmwares 

https://www.radiolink.com.cn/t8fb_bt_app 

If it is T8FB OTG, you can download the firmware and Parameter Adjustment APP from the below link:

https://www.radiolink.com/t8fb_firmwares 

https://www.radiolink.com/t8fb_app 

A: For the Parameter Setting Software on computer, please click the below link to download it:

https://www.radiolink.com.cn/t8fb_bt_app  

If it is Chinese web page, please click English on the upper right corner to change the Chinese web page to English. (Note: Do not use software to translate the Chinese web page to English.) Then you can download the Parameter Setting Software in English.

A: If T8FB keeps beeping when connecting to the mobile phone APP, you need to press any one of the below trimmer buttons to confirm the connection. After pressing the trimmer button, the beeping sound stops and the connection succeeds.

If T8FB beeps after the connection succeeds, you need to check whether alarm is caused by transmitter voltage alarm, model voltage alarm or RSSI alarm. You can set the value to be lower if the value is high.

Please note: Default low battery alarm voltage of T8FB will be automatically set according to the battery used. For 2S lipo battery, it is 7.3V. For 3S lipo battery, it is 11V. For 4 AA batteries with 1.5V, the default low battery alarm voltage is 5V. But the working voltage of T8FB is 4.8V-18V. So we do not recommend users to use 4 AA battery. Because the fully voltage is 6V and it will go off alarm when it is 5V. We recommend users to use 2/3/4S lipo battery, which will be more durable when using on T8FB.

A: Please follow this tutorial:

https://www.youtube.com/watch?v=qJsKnGO4xks

A: You can use wireless trainer cable or trainer cable.

Here is a tutorial to show how to set the trainer function of T8FB with a trainer cable:

https://www.youtube.com/watch?v=gvVRsbHsXxs 

Here is a tutorial to show how to set the trainer function of T8FB with a wireless trainer cable:

https://www.youtube.com/watch?v=mVzSuCRguLw 

A: The transmit mode of T8FB/T8S is on by default and currently can't be turned off.

A: The firmware upgrade of T8FB can only be done via computer.

Please click below link to check the tutorial video

 https://www.youtube.com/watch?v=E2oQ65nYBGs

All necessary files can be downloaded via

 https://www.radiolink.com.cn/t8fb_bt_firmwares 

A: Yes. Here is the tutorial:

https://www.youtube.com/watch?v=hp4g-NTMqMg

A: Please follow the below tutorial:

https://www.youtube.com/watch?v=hp4g-NTMqMg (start from 3:25)

A: Yes for those with the USB port. (There were T8FB of version that don't have the USB port cannot work with simulator.)

Please click below link to the tutorial video on how to use a simulator with T8FB. You need a dongle to connect T8FB to the computer.

https://www.youtube.com/watch?v=yu5YS8K029U 

Here is the definition of the simulator port of T8FB:

If you don’t have a dongle, you can use R16F/R12F receiver which supports built-in simulator function. That is to say, you only need a Type-C cable to use the simulator function. Here is a related tutorial:

https://www.youtube.com/watch?v=HY1jgQSSJVc 

The version without USB port is recommended to change into new version, learn more about trade in activity, please click below link:

https://www.radiolink.com/newsinfo/844239.html 

A: T8FB transmitter is JST(2PIN) battery connector, it adapted for 4*AA(package include battery tray), 2s-4s LiPo, Li-ion, NiMh, and more.

Here is a related tutorial:

https://www.youtube.com/watch?v=Y99IP21feZE 

A: No. T8FB can only work as Trainee/Secondary transmitter.

A: If the transmitter is powered on already and have clicked the "CONNECT" on the APP, but the APP cannot find the transmitter, please check:

(1) if the "Location permission" of your mobile have turned on

(2) turn on the location of the APP by these steps:

  ① choose "Notifications" in "Settings"

  ② click "T8S&T8FB" in "Notifications" and then click "

  ③ choose "Permissions" in APP info, and then click "Location" in "T8S&T8FB" permissions

  ④ choose "Allow only while in use", if the APP is default "Allow only while in use", please change to "Deny" first and then change back to "Allow only while in use"

After the steps above, if still can't connect to the APP, please download the version V603.Here is the download link of the APP:

https://www.radiolink.com.cn/t8fb_bt_app

A: T8FB parameter setup APP is compatible only with ANDROID mobiles or tablets with firmware version V4.0 or above.

A: Sorry, we don't have a list, because there is a tremendous amount. T8FB transmitter can work with most 2.4GHz models. The come-with receiver R8EF supports SBUS/PWM/PPM signal, could operate with most Racing drone, RC plane, fixed-wing, multirotor, RC car, RC boat, RC robot in the market.

If you can't make sure could contact us and we will figure out can it works well with T8FB or not.

A: No, this USB port is only used for the firmware update, not for battery charging.

A: Parameters can be set via APP with mobiles and tablets

https://youtu.be/e6CXVk0i7bE

or software with computer

A: Connect and open the parameter setup APP or software, the data displayed is factory default. Do not change any data and click UPDATE to input the default data into T8FB then factory reset is done.

A: Please follow the tutorial:

https://www.youtube.com/watch?v=4hVgI8mSr3o 

A: Please follow the tutorial:

https://www.youtube.com/watch?v=SzS1kc6ShrE 

A: Please follow the tutorial:

https://www.youtube.com/watch?v=MHh6qlrhjG4 

A: Please follow the tutorial:

https://www.youtube.com/watch?v=thRhOOp6ecs

A: Please follow the tutorial:

https://www.youtube.com/watch?v=1rbuXg8nEBo

A: Please follow the tutorial:

https://www.youtube.com/watch?v=Je8nZ21ZaKo

A: Please follow the tutorial:

https://www.youtube.com/watch?v=wqtwMD0-B1o

A: Please follow the tutorial:

https://www.youtube.com/watch?v=JWSui-1Mb6k 

A: Please follow the tutorial:

https://www.youtube.com/watch?v=D2cwvloIMDM

A: Please follow this tutorial:

https://www.youtube.com/watch?v=yn2tnRJeeLA

A: Please follow this tutorial:

https://www.youtube.com/watch?v=q4uSzHBQFKI

A: Please follow this tutorial:

https://www.youtube.com/watch?v=nquuvM3hmtw 

A: The default servo range of T8FB is 96. If the servo range exceeds the red line when calibrating in RadioLink Mission Planner of flight controller (Mini Pix &Turbo Pix), connect T8FB to the parameter setup APP or software and click BASIC MENU and slightly decrease the servo range value.

A: When there are multiple parameter setup apps running at the back stage, extra data will be read as the servo range displays are not encrypted. Thus, turn off all the running apps, reconnect T8FB to mobile with the USB cable and OTG cable. Click ALLOW to open the APP when the notice pops out asking for open permission.

A: Set ELEVON in advance menu. And set MIX to ACT.

A: NO.

A: Yes. You can control the two receivers at the same time.

A: Yes. Channels 1 to 4 can be set for different servo travel range both individually and at the same time.

When setting one channel for different servo travel range, click “WRITE” after setting D/R value for the corresponding channel. When setting 4 channels for different servo travel range at the same time, click “WRITE” after setting D/R value for each channel. For example: after setting D/R value of channel 1, click “WRITE” to save the settings, and then switch the channel to “CH2”. Set D/R value of channel 2, and then click “WRITE” to save the settings. Repeat this step for channel 3 and channel 4.

A: Yes. You can set ELEVON in the Parameter Setup APP:

Note: Do not set ELEVON when the aircraft is equipped with a flight controller, because the mixing in the transmitter will conflict with the mixing in the flight controller. Please refer to the manual of the to flight controller view the setting method.

A: 1st, please check if the firmware version of T8FB is V2.0.1 or above.

2nd, make sure the USB and the OTG cables work (Note The USB cable should be capable of data transmission instead of charging only.)

3rd, make sure the USB and the OTG cable connect correctly as below

4th, turn on the OTG and the USB function in mobile SETTINGS accordingly

(Note As both functions could be in different menus from mobiles of various brands. Please google the specific way to turn on functions depending the actual mobile model.)

A: The USB port of T8FB is for upgrading the firmware and for copying the data to the computer. It cannot be used on the computer as a controller.

Do not use the USB port as a charging port, or it will damage the transmitter.

A:

1. When the data read by the user differs from the reference data we provide, please check whether the EPA setting of each channel in the transmitter is the same. If the EPA setting for each channel is different, the read signal range will be different.

2. If the SBUS data cannot be read, please check whether the devices used are working properly and whether there is any problem with the connecting cable.

3. Our products support standard SBUS signals compatible with various flight controllers. Please refer to the chart below for detailed information.