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The DBR4 receiver is the perfect partner for the RadioMaster Nomad module. The DBR4 is an advanced dual-frequency, dual-channel Gemini receiver that provides seamless compatibility with the Nomad module. Designed for ultimate performance, the DBR4 features two dual-frequency sections that can simultaneously receive both 2.4 GHz and 900 MHz signals. This innovative design allows for simultaneous processing of two data streams, providing exceptional immunity to interference. With the DBR4, you can be sure that your signal will remain strong and reliable, giving you the confidence to push your limits and explore new possibilities. Enhance your RC experience with the unmatched connectivity and performance of the DBR4 receiver.<\/p>\n
Features:<\/strong><\/p>\n \u2022 Telemetry RF power: max. 2 \u00d7 100 mW; Specification:<\/strong><\/p>\n \u2022 Item: DBR4 Gemini Xrossband ExpressLRS receiver; New packet transmission frequencies:<\/strong><\/p>\n \u2022 Sub-GHz 250Hz (-111 dBm): \u2022 Sub-GHz 200Hz Full (-111 dBm): \u2022 Dual frequency X150Hz (-112 dBm): \u2022 Dual frequency X100Hz Full (-112 dBm): New K modes:<\/strong><\/p>\n \u2022 DK500 (will be available with ExpressLRS V3.5):<\/em> \u2022 K1000 Full SubGHz (will be available with ExpressLRS V3.5):<\/em> Package:<\/strong><\/p>\n 1\u00d7 DBR4 Gemini Xrossband ExpressLRS receiver; Designed for ultimate performance, the DBR4 features two dual frequency sections that can receive both 2.4 GHz and 900 MHz signals simultaneously.<\/p>\n
\n\u2022 Experience an unparalleled experience with the dual-frequency ELRS Gemini Xrossband;
\n\u2022 ExpressLRS Gemini 2.4 GHz;
\n\u2022 ExpressLRS Gemini 868\/900 MHz;
\n\u2022 4 separate antennas for optimal placement;
\n\u2022 Mounting holes: 20 \u00d7 20 mm;
\n\u2022 Supports Xrossband GemX system.<\/p>\n
\u2022 Type: ISM_2.4, FCC_915;
\u2022 Controller (MCU): ESP32;
\u2022 RF chip: Semtech LR1121 \u00d7 2;
\u2022 Telemetry RF power: Max. 100 mW;
\u2022 Antennas: 2 \u00d7 2.4 GHz, 2 \u00d7 900 MHz;
\u2022 Frequency range: 2.404 \u2013 2.479 GHz \/ 903.5 \u2013 926.9 MHz;
\u2022 Maximum reception refresh rate: 500 Hz (1000 Hz \u2013 coming soon with ExpressLRS V3.4);
\u2022 Minimum receiver refresh rate: 50 Hz;
\u2022 Operating voltage: DC 4.5 \u2013 8.4 V;
\u2022 Weight: Without antennas \u2013 2.70 g \/ With antennas \u2013 5.30 g;
\u2022 Dimensions: 27.20 \u00d7 27.20 mm;
\u2022 Software version: ExpressLRS v3.3.2 (pre-installed);
\u2022 Interface: CRSF.<\/p>\n![\"\"](\"https:\/\/1dronas.lt\/wp-content\/uploads\/2025\/04\/DBR4_-pc_08_600x600-min.jpg\")
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Faster Transmission: Achieve higher packet refresh rates with improved Sub-GHz performance.<\/p>\n
Optimized for Mavlink users: twice the data rate of the existing 900 MHz SX1276 device, specially adapted for the Mavlink protocol - for stronger connections and less interference.<\/p>\n
Gemini Mode: Simultaneous transmission of Sub-GHz and 2.4GHz signals ensures highly reliable communication and reduced interference with a 150Hz packet transmission frequency.<\/p>\n
Advanced Gemini Mode: Same dual-frequency benefits with 100Hz packet rate and full 16-channel resolution for reliable communication even in challenging conditions.<\/p>\n
Designed from the ground up for speed and RC reliability enthusiasts. K-modes are a next-generation FSK modulation with built-in packet recovery (Forward Error Correction). Similar to the FLRC D500, the DK500 sends repeated packets to reduce the chance of losing connection during intense racing. When used with the Gemini transmitter and receiver, it provides unmatched RC reliability.<\/p>\n
Yes, you read that right \u2013 1000Hz in the 868\/900 MHz frequency range! This mode is designed for maximum data transfer rates with MAVLink, but during testing it proved effective even in long-range conditions.<\/p>\n![\"\"](\"https:\/\/1dronas.lt\/wp-content\/uploads\/2025\/04\/Nomad-HP0157_04-min.jpg\")
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\n2\u00d7 2.4 GHz wired antennas;
\n2\u00d7 900 MHz wire antennas;
\n1\u00d7 CRSF connection cable;
\n4\u00d7 4 mm red anti-vibration shock absorbers;
\n4\u00d7 3 mm black anti-vibration shock absorbers;
\n1\u00d7 Instruction card.<\/p>\n![\"\"](\"https:\/\/1dronas.lt\/wp-content\/uploads\/2025\/04\/DBR4_-pc_09-min.jpeg\")
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