The official instructions for binding the X8R receiver to the Taranis are quite confusing and cryptic. Therefore, I try to give step by step instructions about how to bind them in the different available modes as well as some background information. The whole process is split into a preparation phase, mode selection and a binding procedure.
The preparation steps of both, the X8R receiver (rx) and the Taranis (tx) are independent and do not follow an exact order. Just make sure everything is prepared as follows:
- Power off the rx
- Remove all servo cables
- Insert the jumpers, all the way in, according the the table below. If you have no jumpers, just shortcut the neighbouring pins somehow. A simple piece of metal, a screw or a screwdriver will do.
- Prepare your RC model so that you can power the rx through a servo cable (attach a battery).
- Power on the Taranis
- select the model you want to bind it to (press MENU)
- go to the edit menu of select model (press PAGE)
- select the mode (D16) and the number of channels you want to use
- Place the rx and tx approximately 1m (3 feet) apart. Closer might give transmission errors.
Select the mode
There are 5 different transmission modes available, all have different properties as you can see in the table below. First of all there are the two fundamentally different ‘signal’ modes D8 and D16. The names are a bit misleading. D8 refers to the older D series transmitters with up to 8 channels and telemetry, but without ModelMatch and Failsafe. These features are only available with D16, which offers a maximum of 16 channels. There is no reason for using D8, except you are using an older radio (tx) which does not support D16. Otherwise, D16 its the way to go, even if you transmit just a handful of channels.
The X8R offers four configurations for D16. The number looks a bit excessive at first, but it basically allows every possible combination the following two features.
- Telemetry can be disabled, which is useful if you are using two X8R transmitters together on the same model. One of the two would the be set to either Mode 2(D16) or Mode 3(D16) as only one X8R can transmit telemetry back to the Tx.
- You can select which of the 16 channels are output on the eight physical PWM servo connectors. These are either CH1 – CH8 or CH9-CH16 .
|Mode||Telemetry||Failsafe and |
|Channel Output||Jumper(s)||F/S Button|
|Mode 1 (D8)||Yes||No||CH1 - CH8||1: CH7&CH8||do not press|
|Mode 2 (D16)||No||Yes||CH1 - CH8||1: CH3&CH4||press before power|
|Mode 3 (D16)||No||Yes||CH9 -CH16||1: CH1&CH2||press before power|
|Mode 4 (D16)||Yes||Yes||CH9 -CH16||1: CH1&CH2|
|press before power|
|Mode 5 (D16)||Yes||Yes||CH1 - CH8||none||press before power|
For my Discvery Pro I use Mode 4, where the S.BUS is used for the NAZA (CH1-CH8) and the dedicated PWM outs CH9-CH11 for controlling the gimbal and video switch.
After everything is setup execute these steps
1) Press [bind] in the Taranis menu
2) press and hold down the F/S button on the X8R (skip for Mode1)
3) power-on the X8R by plugging in a single servo cable from the powered model, e.g. the S.BUS cable
4) wait for the Taranis to beep. (~1second) and your RX is blinking red. This confirms a successful bind.
5) power off the rx
6) remove the jumpers, they are only needed for binding
Done! Next time you power up the receiver it will be controlled by the Taranis. The binding is really quick, so when following the instructions above you probably never see steady lights on the X8R, only the flashing red one, which is fine. If you choose to power the receiver before pressing [bind] on the Taranis you will see a steady green and red light at first, while the X8R is waiting for you to initiate the bind on the Taranis. A successful bind is always indicated with the flashing red light.