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)

Please Note Disclaimer:

Lemos International does not assume any responsibility for errors nor any liability arising from the application or use of any sub-assemblies purchased through Lemos International, including fitness for any particular application.

The purchaser must satisfy all relevant FCC and Radio Regulations which applies to their finished product in the country of intended use. These modules transmit and/or receive radio signals and may not function as intended if interference is present.

Downloads & Datasheets

  1. Full Specs PDF


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