NBFM Multi-channel 500mW UHF Transmitter

NBFM Multi-channel 500mW UHF Transmitter

Frequency:458.525 - 459.1MHz (UK)

The HMT2 transmitter module offers a 500mW RF output in the UK 458MHz. This unit is ideally suited to applications where existing lower powered transmitters provide insufficient range. The HMT2 transmitter is a multi-channel, narrowband design, suitable for licensed and unlicensed UHF allocations.


  • Conforms to EN 300 220-3 and EN 301 489-3
  • PLL Synthesized transmitter with TCXO
  • Data rates up to 5 kbps for standard module
  • Usable range over 5km
  • Fully screened
  • User configurable via RS232 interface
  • Low power requirements


  • Handheld terminals
  • On-site paging system (e.g. Nurse call pagers)
  • Heavy vehicle/machine remote controls
  • Data loggers
  • Industrial telemetry and telecommand
  • High-end security and fire alarms
  • Vehicle data up/download


Technical Summary

  • Operating frequency: 458.525 - 459.1MHz (standard)
  • 16 parallel / 32 serial select channels
  • Transmit power: +27dBm (500mW) nominal
  • Supply range: +5V regulated
  • Current consumption: 350mA transmit, <5mA standby
  • Data bit rate: 5kbps max. (standard module)
  • Size: 66 x 23 x 9 mm