UHF Narrow Band FM Transmitter

Available for licence-exempt operation in the 433MHz (EU) and 458MHz (UK) bands, the NTX2B module combine effective screening with internal filtering to minimise spurious radiation and susceptibility thereby ensuring EMC compliance.


The standard NTX2B version is a 10mW 25kHz Narrow bandTransmitter with data rates up to 10kbps and is available on 434.075MHz, 434.650MHz European SRD
frequencies and 25mW on 458.700MHz for the UK. The NTX2B is also available with 12.5kHz or 20kHz channel spacing for licensed US FCC Part 90 or legacy
European Telemetry/Telecommand bands. The NTX2B features an internal LDO voltage regulator which enables the transmitter to be operated down to 2.9V
and up to 15V voltage supply at a nominal current consumption of 18mA and less than 3uA in power-down mode, which can be enabled within 5ms. NTX2B
can transmit both digital and 3V pk-pk analogue signals. Offering greater range than wideband modules, the transmitter can be paired with the new NRX2B
receiver for a usable range of over 500m, ideal for performance critical low-power wireless applications including security, sensor networks, industrial/commercial
telemetry and remote control.


  • Conforms to ETSI EN 300 220-3 (radio) and EN 301 489-3 (EMC)
  • NTX2/NRX2 equivalent standard frequencies – 434.075MHz, 434.650MHz and 458.700MHz
  • Factory programmable custom frequency (425 – 480MHz). No crystal lead-times
  • Custom frequencies available in 433MHz (EU) and 458MHz (UK) band
  • Data rates up to 10kbps
  • Usable range over 500m (with matching LMR2)
  • 12.5kHz / 20kHz / 25kHz Channel spacing (factory set)
  • Feature-rich interface (true analogue and/or digital baseband)
  • Longer range compared to Wide Band FM modules


  • Sensor nodes
  • Radio model control
  • EPOS and inventory tracking
  • Remote industrial process monitoring
  • Telemetry, telecommand and telecontrol
  • In-building environmental monitoring and control
  • Security and fire alarms
  • Wireless door entry systems
  • Vehicle/machinery controls

Technical Summary

  • Transmitter – NTX2B
  • Fully integrated sigma-delta PLL synthesizer based design
  • High stability TCXO reference
  • Supply 2.9V – 15V @ 18mA (internal 3.0V LDO voltage regulator)
  • Data bit rate: 10kbps max.
  • Transmit power: +10dBm (10mW)
  • Dimensions 43 x 15 x 5mm (fully screened)

Downloads & Datasheets

  1. Full Specs PDF




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