RadioMaster Nomad Dual 1-watt Gemini Xrossband ExpressLRS Module

Gemini Xrossband is RadioMaster's implementation of simultaneous dual-band transmission. It uses the module's twin 1W Semtech LR1121 transceivers to broadcast identical control packets on both 2.4GHz and 868/900MHz frequencies at the same time. This provides inherent signal redundancy, dramatically improving reliability and resistance to interference in challenging RF environments compared to single-band or switching dual-band systems.

The Nomad module accepts a wide input voltage range of 6V to 16.8V DC via its integrated XT30 power port. This makes it compatible with most transmitter battery configurations, from 2S LiPo (7.4V) up to 4S Li-ion (16.8V). Ensure your transmitter's battery bay or external port can supply sufficient current to support the dual 1W transceivers during peak transmission.

Yes, the RadioMaster Nomad is fully compatible with all ExpressLRS receivers, both single-band (2.4GHz or 900MHz) and dual-band models. When using Gemini mode, it will communicate with the receiver on both frequencies simultaneously if the receiver supports dual-band, otherwise, it will use the receiver's native single band. Binding and setup follow standard ExpressLRS procedures.

K-Modes (like DK500 and K1000) are next-generation FSK modulation protocols with built-in Forward Error Correction (FEC) planned for future ExpressLRS firmware releases (v3.5+). They are designed for extremely high packet rates—up to 1000Hz on the sub-GHz band—while maintaining stability. These modes aim to provide the lowest possible latency and highest data throughput for racing and other latency-sensitive applications.