FrSky TW GR6 Dual Active 2.4GHz Receiver with Variometer Instruction Manual

1. Introduction

The FrSky TW GR6 is a high-performance dual active 2.4GHz receiver designed for advanced RC applications, including gliders and FPV. It utilizes the innovative TW protocol, which simultaneously operates on two 2.4GHz frequency bands for enhanced signal resilience and extended range, surpassing traditional active-standby redundancy systems. This receiver integrates a high-precision variometer for accurate altitude and vertical speed data, crucial for glider pilots. It offers versatile connectivity with 6 PWM outputs, an SBUS output, and FBUS/S.Port telemetry capabilities, including an inverted S.Port for direct flight controller connection. The TW GR6 also supports a 4ms race mode for ultra-low latency, ensuring reliable control in competitive environments.

Key Features:

• Simultaneous working dual 2.4G TW mode for enhanced signal reliability.
• Integrated high-precision variometer sensor for accurate altitude and vertical speed.
• Black-Box function for data logging.
• 4ms race mode with telemetry for ultra-low latency control.
• Long control range (actual range varies based on RF Power settings).
• Over-The-Air (OTA) firmware update capability.
• 6 PWM channel ports for standard servo connections.
• SBUS Out (supports 16CH / 24CH mode).
• FBUS / S.Port for comprehensive telemetry.
• Inverted S.Port for simplified flight controller integration.
• Antenna connector: IPEX4.
• Compatibility: TWIN series Radio & RF module in TW mode.

2. Product Overview

The FrSky TW GR6 receiver is compact and designed for easy integration into various RC models. Below are detailed views of the receiver's components and connection points.

Figure 2.1: Top View. This image displays the top side of the FrSky TW GR6 receiver, highlighting the labeled PWM output pins (1-6), SBUS output, FBUS/S.Port, and the LED indicator. The TW GR6 model designation is clearly visible.

Figure 2.2: Bottom View. This image shows the underside of the receiver, revealing the internal components through its translucent casing. This view provides insight into the compact design and component layout.

Figure 2.3: Side View. This perspective illustrates the side of the receiver, focusing on the pin headers for connections and the antenna wire extending from the unit. The compact form factor is evident.

Figure 2.4: Angled View with Antennas. An angled view of the receiver, clearly showing both 2.4GHz antennas extending from the unit. This highlights the dual antenna setup for the TW protocol.

3. Setup and Binding

3.1. Initial Connection

Before binding, ensure all necessary connections are made correctly.

1. Power Supply: Connect the receiver to a suitable power source (typically 3.5-10V) via one of the PWM channels or the FBUS/S.Port. Observe polarity.
2. Antenna Placement: Ensure both 2.4GHz antennas are mounted at 90-degree angles to each other and away from conductive materials or carbon fiber structures for optimal signal reception.
3. Servo/ESC Connections: Connect your servos or Electronic Speed Controllers (ESCs) to the appropriate PWM output channels (1-6) as required by your model.
4. SBUS/FBUS/S.Port: If using SBUS for multiple channels or FBUS/S.Port for telemetry and control, connect the respective port to your flight controller or other compatible device.

3.2. Binding Procedure

The TW GR6 receiver must be bound to a FrSky TWIN series radio or RF module operating in TW mode.

1. Enter Binding Mode on Radio: Power on your FrSky TWIN series radio transmitter and navigate to the RF system settings. Select the TW mode and initiate the binding process.
2. Power on Receiver in Binding Mode: While holding the F/S button on the TW GR6 receiver, connect the power supply. Release the F/S button after the receiver's LED begins to flash rapidly, indicating it is in binding mode.
3. Confirm Binding: The LED on the receiver will change its state (e.g., solid green) once binding is successful. Refer to your radio's manual for specific LED indications.
4. Range Check: After successful binding, perform a range check according to your radio's instructions to ensure reliable communication.
5. Over-The-Air (OTA) Updates: The TW GR6 supports OTA firmware updates. Consult your radio's manual and the FrSky website for instructions on performing OTA updates.

4. Operating Instructions

4.1. PWM and SBUS Output

The TW GR6 provides 6 standard PWM output channels for direct connection to servos or ESCs. For systems requiring more channels or simplified wiring, the SBUS output supports up to 16 or 24 channels, depending on the radio's configuration. Connect SBUS to compatible flight controllers or SBUS-to-PWM decoders.

4.2. FBUS / S.Port Telemetry

The FBUS/S.Port allows for bidirectional communication, enabling telemetry data transmission back to your radio. When configured for FBUS in the ETHOS system, a single wire can manage both control signals and telemetry with compatible FBUS devices. The inverted S.Port provides flexibility for connecting to flight controllers that require an inverted signal.

4.3. Variometer Functionality

The built-in high-precision variometer provides real-time altitude and vertical speed (climb/sink rate) information. This data is transmitted via telemetry to your radio, offering audible and visual feedback essential for glider pilots to identify thermals and manage flight profiles. Calibration may be required for optimal accuracy; refer to your radio's manual for variometer calibration procedures.

4.4. Race Mode

For competitive racing, the TW GR6 supports a 4ms race mode, significantly reducing latency between your radio input and the model's response. This mode, combined with the TW protocol's dual 2.4G resilience, provides a fast, stable, and reliable signal critical for high-speed maneuvers and avoiding signal loss in challenging race environments.

5. Maintenance and Firmware Updates

5.1. General Care

• Keep the receiver clean and free from dust, dirt, and moisture.
• Avoid exposing the receiver to extreme temperatures or direct sunlight for prolonged periods.
• Regularly inspect antenna wires for damage and ensure secure connections.
• Ensure proper ventilation if installed in an enclosed space.

5.2. Firmware Updates (OTA)

The TW GR6 receiver supports Over-The-Air (OTA) firmware updates directly from your compatible FrSky TWIN series radio. This allows for convenient updates without needing physical connection to a computer. Always refer to the latest firmware update instructions provided on the official FrSky website or through your radio's ETHOS system for the most current procedure.

6. Troubleshooting

• Receiver Not Binding:
  • Ensure your radio is a TWIN series model and is set to TW mode.
  • Verify the F/S button is pressed correctly during power-up.
  • Check power supply to the receiver.
  • Ensure the radio and receiver firmware are compatible.
• No Signal/Intermittent Signal:
  • Check antenna placement and ensure they are not obstructed or damaged.
  • Perform a range check.
  • Verify the receiver is securely bound to the transmitter.
  • Avoid operating near strong RF interference sources.
• Telemetry Not Working:
  • Ensure FBUS/S.Port is correctly connected and configured in your radio's settings (e.g., ETHOS system).
  • Check for proper wiring and polarity.
  • Verify that the connected telemetry sensors or flight controller are compatible and correctly configured.
• Variometer Inaccuracies:
  • Ensure the receiver is not exposed to direct airflow or pressure changes from propellers/fans.
  • Perform a variometer calibration if available in your radio's settings.
  • Check for any physical obstructions near the variometer sensor port (if accessible).

7. Specifications

8. Warranty and Support

FrSky products are manufactured to high quality standards. This product is covered by a limited warranty against manufacturing defects. Please refer to the official FrSky website for detailed warranty terms and conditions, as well as information on how to obtain technical support.

For further assistance, visit the official FrSky store or support page: FrSky Official Store