High Power Narrow Band Category 1 Radio Modem


Frequency:458MHz (UK), 866MHz (India), 869MHz (EU)

The LNM2H radio modem module offers a 500mW RF output 19200 data link with 3.3V TTL UART interface. It meet meets the ETSI Category 1 high performance receiver specification to be used where the operation of a SRD may have inherent safety of human life implications


  • Standard 458MHz (UK), 866MHz (India), 869MHz (EU)
  • Available from 160MHz to 915MHz
  • 12.5kHz / 25kHz channel spacing Narrow Band FM Multichannel
  • Data rates up to 19200kbps
  • ETSI EN 300 220-1 Category 1 High performance level receiver
  • Point-to-Point, Point-to-Multipoint
  • Store and Forward Repeater Mode with Dual Addressing to extend operating range
  • Whitening of the data by XORing with a 9-bit pseudo-random (PN9) sequence
  • 2-byte CRC checksum
  • Digital Received Signal Strength Indicator (RSSI)
  • Range Test Mode


  • Safety-critical wireless applications such as social alarms and healthcare monitoring
  • High-end security and fire alarms
  • Lone Worker Alarms
  • Industrial/Commercial Telemetry and Telecommand or Non-specific SRD usage
  • In-building environmental monitoring and control

Technical Summary

  • Size: 47 x 34.5 x 7mm
  • Operating frequencies: CH0:458.525, CH1:458.550,…CH15:458.900MHz
  • Supply range: 5V DC
  • Current consumption: 280mA TX
  • Current consumption: 40mA RX
  • RF baud rate: 300, 600, 1200, 2400, 4800, 9600, 19200bps (default).
  • User baud rate: 300, 600, 1200, 2400, 4800, 9600 (default), 19200, 38400bps.
  • Flow control: RTS/CTS, None (default)
  • Modulation: 2-level GFSK [Binary], 4-level GFSK [Quaternary] (default)
  • Transmit power: +27dBm (500mW) on 458MHz or +26dBm (400mW) on 869MHz
  • 32MHz TCXO Reference with ±2.0ppm frequency stability over -30˚C +85˚C
  • SAW front end filter