If you would like to connect your Graupner radio system to a third-party product such as flight controllers, power extenders or any device that uses a compatible protocol to communicate with RC receivers.
The benefits are that it simplifies the installation and interfacing between the receiver and device with a single wire that takes care of all the data transfer.
When the receiver is set to provide such digital output, it will use one of the servo channels on the receiver to communicate with the device. That channel cannot be used for anything but data communication with the device.
The output signal is by default at channel 6 for all GR-12 receivers and channel 8 for all other receivers. This cannot be changed.
OUTPUT TYPES – SUMO/SUMD/SUMD3/SBUS
Changing the output type is done over the settings and data view menu and navigating to the last receiver menu screen. Changes can be made on the CH OUT TYPE.
Please note that it is important that you set the same communication protocol on the device you plan to connect.
SUMO – PPM analog sum signal. The 2-digit display after the SUMO field represents the number of channels to be transmitted. Regardless of the physical channels you have on the receiver you can transmit up to 16 channels.
SUMD – Digital sum signal is comparable to SUMO but only as digital with a 10ms cycle. The parameters after SUMD show the fail save settings.
- FS: In case of loss of reception, the values configured in the receiver failsafe are used
- HD: In case of loss of reception, the last signal is repeated
- OF: In the event of loss of reception, the output signal is switched OFF effectively transferring the failsafe settings to the connected device.
The 2-digit display after the failsafe fields represents the number of channels to be transmitted. Regardless of the physical channels you have on the receiver you can transmit up to 16 channels.
SUMD3 – Same as SUMD but allowing the use of all 32 channels and 64 digital switch channels on the mz-32 radio system.
SBUS – Digital sum signal compatible with the Futaba protocol.