VHF Narrow Band FM Multi channel Transceiver


The TR1M narrow band multi channel transceiver module is intended as a general purpose VHF data communication unit. It is available on any frequency between 135 and 175MHz.

Download Product Spec



  • Conforms to EN 300 220-3 and EN 301 489-3
  • Any 3MHz band module from 135MHz to 175MHz available as factory tuned custom variant
  • High performance double superhet, 128 channel PLL Synthesizer with TCXO
  • Data rates up to 5 kbps for standard module
  • Usable range over 1km (with 100mW variant)
  • Fully screened
  • Feature-rich interface (RSSI, automatic noise squelch, analogue and digital baseband)
  • Incorporates a 1200baud dumb modem
  • User configurable via RS232 interface
  • Low power requirements


  • 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

  • Size: 59 x 38 x 12mm
  • Custom variants from 135MHz to 175MHz on any 3MHz band (Available on the UK 173.2MHz –
  • 173.325MHz 10mW band)
  • 128 serial select or 8 parallel select channels
  • Transmit power: +20dBm (100mW) nominal
  • Supply range: 4.5V – 16V
  • Current consumption: 110mA transmit (@100mW), 27mA receive
  • Data bit rate: 5kbps max. (standard module)
  • Receiver sensitivity: -118dBm (for 12 dB SINAD)

Downloads & Datasheets

  1. Full Specs PDF