500mW NBFM Multi-channel UHF Transceiver

500mW NBFM Multi-channel 458MHz Transceiver

Frequency:458.5-459.1MHz (UK); 420MHz to 480MHz on any 4MHz band

The SFX2 transceiver module offers a 500mW RF power output in the UK 458MHz band. This makes the SFX2 ideally suited to those low power applications where existing multi-channel narrow band devices like TR2M have insufficient range.


  • Conforms to EN 300 220-3 and EN 301 489-3
  • High performance double superhet, 255 channel PLL Synthesizer with TCXO
  • Data rates up to 5 kbps for standard module
  • Fast TX switching time (5ms typ.)
  • Usable range over 5km (@ 500mW)
  • Fully screened
  • Feature-rich interface (RSSI, automatic noise squelch, analogue and digital baseband)
  • User configurable via RS232 interface


  • Handheld terminals
  • Heavy vehicle/machine remote controls
  • EPOS equipment, barcode scanners
  • Data loggers
  • Industrial telemetry and telecommand
  • In-building environmental monitoring and control
  • High-end security and fire alarms
  • Vehicle data up/download


Technical Summary

  • Operating frequency: 458.5-459.1MHz UK (23 channels) as standard
  • Other UHF frequencies available on request
  • Up to 255 channels (8 parallel selected).
  • Transmit power: +27dBm nominal (adjustable 100 - 500mW)
  • Supply range: 6V - 9V (100% duty cycle), 6V – 15V (10% duty cycle)
  • Current consumption: 350mA transmit, 35mA receive
  • Data bit rate: 5kbps max. (standard module)
  • Receiver sensitivity: -118dBm (for 12 dB SINAD)
  • Size: 59 x 39 x 15mm

Evaluation platforms: NBEK + xx2M Series carrier