Trimble EMPOWER EM940 — 450 & 900 MHz UHF Radio Module

The Trimble EMPOWER EM940 is a dual-mode radio receiver module designed to provide maximum flexibility for receiving GNSS RTK corrections from a wide range of base radio systems. Supporting both 450 MHz (410–473 MHz) and 900 MHz spread spectrum (902–928 MHz) frequency bands, the EM940 ensures compatibility with regional radio standards and diverse base configurations.

Fully integrated into the Trimble EMPOWER platform, the EM940 is supported by current Trimble devices with EMPOWER slots and works seamlessly with Trimble Access™, Trimble Siteworks, Spectra Geospatial® Origin, and Trimble Empower™ Hub. Built to withstand demanding field conditions, it carries an IP68 rating and meets MIL-STD-810H environmental testing standards.

Key Features

• Dual-mode support: UHF (410–473 MHz) and 900 MHz FHSS (902–928 MHz)

• Flexible channel bandwidth (25 kHz / 12.5 kHz) and 6.25 kHz step (UHF)

• Frequency Hopping Spread Spectrum (900 MHz)

• Compatible with EMPOWER-enabled Trimble controllers

• Rugged IP68-rated housing with MIL-STD-810H testing

• Supplied with UHF and 900 MHz antennas

Ideal For

GNSS surveyors and construction professionals who require flexible, regionally compatible radio correction reception for RTK workflows using Trimble EMPOWER-enabled controllers and rover receivers.