Radiomaster XR3 Nano Multi-Frequency ExpressLRS Receiver User Manual

1. 서론

The Radiomaster XR3 Nano Multi-Frequency ExpressLRS Receiver is a compact and versatile receiver designed for remote control applications, offering robust signal stability and extended range. It supports both 2.4GHz and Sub-G 900MHz frequency bands, making it suitable for various setups. This manual provides essential information for the proper installation, operation, and maintenance of your XR3 receiver.

Image 1.1: Radiomaster XR3 Nano Multi-Frequency ExpressLRS Receiver with connected dual-band antennas.

2. 안전 정보

Please refer to this instruction manual before use. Improper handling or installation may lead to equipment damage or personal injury. Ensure all connections are correct and secure before powering on the device. This product is recommended for users aged 18 years and up.

3. 특징

• 안테나 다양성: Utilizes two antennas for improved signal stability and extended range, featuring a Skyworks RFX2401C for enhanced receiver performance and telemetry.
• 다중 주파수 지원: Operates on both 2.4GHz and Sub-G 900MHz bands.
• 고성능 MCU: Equipped with an ESP32C3 microcontroller.
• Advanced Transceiver: Features a Semtech LR1121 transceiver.
• 추가 연결: Includes an additional UART port and secondary port for advanced functionality.
• 간편한 납땜: Designed with castled pads for convenient soldering.
• 통합 WiFi: Built-in WiFi for effortless configuration and firmware updates via an intuitive WebUI.
• 컴팩트한 디자인: Ultra-compact dimensions (22mm x 15mm x 4mm) and lightweight (1.3g without antennas).

이미지 3.1: 이상view of the XR3 receiver highlighting its multi-frequency, antenna diversity, LR1121, and ExpressLRS features.

4. 패키지 내용

패키지에 모든 품목이 들어 있는지 확인하세요.

• 1 * XR3 나노 다중 주파수 안테나 다이버시티 ExpressLRS 수신기
• 2 * T Antenna (Either 2.4GHz, 900Mhz, or Dual-band, depending on selected package)
• 1 * CRSF 와이어
• 3 * 열수축 튜브
• 1 * 매뉴얼 카드

5. 설정

5.1 물리적 연결

Connect the XR3 receiver to your flight controller or other compatible device using the provided CRSF wire. Ensure correct polarity and pin assignments for 5V, TX (Transmit), and RX (Receive).

• 5V : Power input (DC 4.5-8.4V)
• TX : Telemetry data output from receiver
• RX : Control data input to receiver

이미지 5.1: 클로즈업 view of the XR3 receiver board, indicating the 5V, TX, and RX pads for connection.

5.2 안테나 설치

Carefully connect the two T-antennas to the IPEX-1 connectors on the receiver board. Ensure they are securely attached. Position the antennas to maximize signal reception, typically at a 90-degree angle to each other for optimal diversity.

5.3 Binding (Pairing)

The XR3 receiver uses the ExpressLRS protocol for binding. Follow these general steps:

1. Power on your receiver three times, cycling power quickly. The LED on the receiver should flash rapidly, indicating it is in bind mode.
2. On your ExpressLRS compatible transmitter, initiate the binding process. Refer to your transmitter's manual for specific instructions.
3. 연결이 완료되면 수신기의 LED가 계속 켜져 있어 연결이 성공적으로 이루어졌음을 나타냅니다.

Alternatively, the XR3 features a bind button. Press and hold the bind button while powering on the receiver to enter bind mode. The receiver also supports binding via WiFi.

이미지 5.2: 위에서 아래로 view of the XR3 receiver board, showing the location of the bind button.

5.4 펌웨어 업데이트

The XR3 receiver supports firmware updates via its built-in WiFi. Connect to the receiver's WiFi network using a PC or mobile device and access the WebUI to manage settings and update firmware. Ensure you are using the correct firmware target: "RadioMaster XR3 2.4/900 Diversity RX".

6. 운영

6.1 주파수 선택

The XR3 receiver is capable of operating on either 2.4GHz or Sub-G 900MHz frequencies. The type of antenna included with your package determines the primary operating frequency. If you have a dual-band antenna, the receiver can switch between 2.4GHz and 900MHz without requiring an antenna change. Ensure your transmitter is configured to match the receiver's operating frequency.

Image 6.1: The XR3 receiver supports various antenna types for 2.4GHz, Sub-G 900MHz, or Dual-Band operation.

6.2 ExpressLRS Functionality

Once bound, the XR3 receiver will communicate with your ExpressLRS transmitter, providing control and telemetry data. The antenna diversity feature automatically selects the best signal from the two antennas, enhancing link quality and range, especially in challenging RF environments. The telemetry power output is 100mW.

Image 6.2: The XR3 receiver incorporates a Low-Noise amplifier to boost sensitivity and a Power amplifier for extended telemetry range.

7. 유지관리

The XR3 receiver is designed for durability, but proper care can extend its lifespan:

• 수신기를 깨끗하고 먼지, 흙, 습기가 없는 상태로 유지하세요.
• 수신기를 극한 온도나 직사광선에 장시간 노출시키지 마십시오.
• Ensure antenna connections are secure but do not overtighten.
• Regularly check for any visible damage to the board or antennas.

8. 문제 해결

If you encounter issues with your XR3 receiver, consider the following:

• No Bind: Ensure the receiver is in bind mode (rapidly flashing LED) and your transmitter is attempting to bind on the correct ExpressLRS firmware version and frequency. Check power connections.
• 신호/수신 범위 불량: Verify antenna connections and positioning. Ensure no obstructions are blocking the signal path. Check for local RF interference. Confirm the correct frequency band (2.4GHz or 900MHz) is selected on both receiver and transmitter.
• No Telemetry: Check the TX/RX wiring between the receiver and flight controller. Ensure CRSF protocol is correctly configured in your flight controller and transmitter.
• 수신기 전원이 켜지지 않음: 전원 공급량 확인tage (DC 4.5-8.4V) and polarity. Inspect for any short circuits or damaged components.

9. 사양

Image 9.1: LR1121 Receiver Frequency Chart, showing compatibility across different XR models.

Image 9.2: ExpressLRS Dual-band Mode Compatibility Chart, detailing modulation modes and frequency bands for various modules.

10. 보증 및 지원

보증 정보 및 기술 지원에 대해서는 공식 Radiomaster 웹사이트를 참조하십시오. web사이트를 방문하거나 공인 대리점에 문의하세요. 보증 청구를 위해 구매 증빙 자료를 보관하세요.