1. Overview
    Gremsy’s gimbal is compatible with:
  2. Connecting the receiver 
    • To connect a PPM receiver or an S.Bus receiver, plug the ground (Black), power (Red), signal (usually white - orange in the diagram below) wires to the PPM or SBUS pins on the Gimbal.
    • The following S.Bus receivers have been tested and are known to work: Frsky X8R, Fr XSR, Futaba R20008SB, Futaba R6008SB
  3. Radio System that support PPM or S.Bus directly

    This section list radio systems that support PPM or S.Bus directly

        -    FrSky Taranis X9D and Taranis Q X7 RC Transmitters



  4. RX Protocol 
    1. S.BUS (Serial BUS): S.BUS is an inverted UART communication signal - By Frsky, 
      • Futaba Main advantage of SBUS
        • Support up to 18 channels using just one signal cable.
        • S.BUS faster than PPM and PWM
        • Different Error Handing
        • Smoother, better resolution RC input
      • FrSky X receivers

        • FrSky X receivers are compatible with the Frsky Taranis and XJT transmitter modules. They support S.Bus and bidirectional S.port telemetry
      • Spektrum DSM, DSM2, and DSM-X Satellite – Digital System Multiplexer
        • DSM was created by Spektrum, with the main features of DSM2 is that is very robust against noise and interference and other transmitting on the same frequency.
        • DSMX was based on and improved from DSM2.
        • DSM2 is still a popular technology. If you are away from sources of radio interference (such as: Wifi, microwaves, and wireless security cameras).A spektrum Satellite is an additional antenna and receiver circuit that usually gets connected to the “main” receiver to improve link reliability by providing diversity reception.
    2. PPM – Pulse Position Modulation 
      • PPM is also an analogue signal, but instead of using a separate wire for each channel.
      • Other variations of PPM include CPPM, and PPM-Sum.
            
        • Main advantage of PPM
              Only one signal wire is needed for several channel (typically 8 channels max)
  5. FrSky Transmitter Module and S.Bus/PPM
    1. FrSky Transmitter Module
      • The Frsky XJT module is a 2.4GHz frequency hopping “ACCST” transmitter that features Smart Port telemetry. It can operate in 8 channel, 16 channel, and long range 12 channel mode.
      • The XJT is compatible with the Frsky X series such as the popular X8R and XSR
    2. FrSky Receivers Module

      The X8R and XSR receivers have S.Bus and CPPM outputs, and also feature Smart Port telemetry.


  6. Futaba Transmitter Compatible with Futaba S.Bus Receiver

    This list of supported receivers for the Gimbal (H3, H7. H16, T1, T3, H3, T45) is given blow:

    1. Futaba R70008SB S.Bus2 Receiver 
      • Features
        • Bi-directional communication with a FASSTest Futaba transmitter using the S.bus2 port.
        • 2.4GHz FASSTest 8+ Channel High-Voltage Receiver for the 18MZ Radio System.
        •  External voltage Port: 0 - 70V DC
    2. Futaba R6303SB S.Bus Receiver
      • Feature
        • Futaba R6303SB 3-18 Channel FASST 2.4GHz
        • S.Bus system output and three conventional system channel outputs allows usage with conventional servos as well as S.Bus system compatible servos and gyros
    3. FrSky FASST compatible S.BUS compatible TFR8 SB 8ch 2.4Ghz Receiver
      • Feature
        • Compatible with  FASST 2.4 GHz (7CH mode/Multi Mode)
        • SB port is compatible with Futaba S.Bus servors and FrSky servo D12MH
        • RSSI output
    4. Further note on S.Bus
      • FASSTest 18CH mode (R7008SB Receiver) generates S.Bus frames every 15ms. It allows 16 channels, plus two digital (on/off).
      • FASSTest 12CH mode generates frames every 6.3ms. It allows 10 channels, plus two digital (on/off), and it only allows Rx and Ext bat voltages for telemetry
  7. Spektrum Satellite Receivers.

    Currently, satellites only work with the Spektrum DX7 and DX8 transmitters.