Radiomaster RP4TD ExpressLRS 2.4GHz True Diversity Receiver

Featuring dual-channel 2.4GHz radio communication, the RP4TD features high signal sensitivity, better signal-to-noise ratio, and overall performance. The reliable DCDC power supply circuit ensures lower operating temperature even during long-term use. In addition, the dual TCXO ensures exceptional frequency stability, making the RP4TD a leader in its class.

The RP4TD has built-in WiFi, so you can wirelessly update software and configure the receiver via the integrated WebUI using a computer or mobile phone.

Suitable for use in drones and fixed-wing models, this receiver can be installed almost anywhere a serial receiver is needed!

Features:

• Compatible with Gemini mode;
• Reliable DCDC power supply circuit;
• Top-class SNR and RSSI performance;
• Optimized PCB design for better heat dissipation;
• Updated antenna with greater durability and better performance;
• UART contacts for additional applications;
• Dual TCXO (temperature-controlled crystal oscillator);
• 2× 100mW RF telemetry power output;
• Compatible with all 2.4GHz ExpressLRS modules and transmitters with integrated 2.4GHz ExpressLRS.

Specification:

• Item: RP4TD ExpressLRS 2.4GHz dual antenna receiver;
• Type: ISM;
• Microcontroller (MCU): ESP32;
• RF chip: SX1281 × 2;
• Antenna: 65mm 2.4GHz T-type antenna × 2;
• Frequency range: 2.4GHz;
• Maximum refresh rate: 500Hz / F1000Hz;
• Telemetry RF power: Max. 2× 100mW;
• Operating voltage: DC 4.5-12.0V;
• Weight: 1.4g (without antenna);
• Dimensions: 23.7 × 16.3 × 4.0 mm;
• Software version: ExpressLRS V3.3.0 (pre-installed);
• Firmware target: RadioMaster RP4TD 2400 RX;
• Interface: CRSF;
• Additional interface: UART.

Dual TCXO (Temperature Compensated Crystal Oscillator)

The TCXO provides high stability and accuracy in frequency control by compensating for temperature fluctuations. This allows you to maintain consistent and reliable signal reception even under extreme temperature conditions.

In addition, the TCXO reduces frequency drift over time, ensuring long-term frequency stability and protecting against signal degradation. Testing has shown that dual TCXOs provide even greater benefits in a real dual-antenna receiver system.

RP4TD is now mLRS compatible!

The mLRS project offers high-performance long-range radio communication based on open source 2.4 GHz, 915/868 MHz and 433 MHz/70 cm LoRa technology. It provides bidirectional serial communication along with full remote control functionality.

The "m" in the project name stands for "Mavlink" because this system will have features that optimize Mavlink systems. However, mLRS will always also support transparent serial communication, so it can be used more widely and will not be limited to Mavlink systems.

The letters “LR” in the project name stand for “long range”, but this should not be understood as an absolute range, such as 100 km. Instead, it refers to the best possible communication range under certain conditions. The laws of physics dictate that the higher the data rate, the shorter the communication range. mLRS is not intended to compete with systems that achieve long range by drastically reducing the data rate. Instead, mLRS aims to provide a long operating range combined with a relatively high data rate.

Package:

1× RP4TD ExpressLRS 2.4GHz dual-antenna receiver;
1× CRSF cable;
3× Thermo tube;
2× 65mm 2.4GHz T-type antenna (installed in the receiver);
1× User manual.