Designers, Manufacturers, and Distributors of RF Components

  • NTX2B-434.650-10


    UHF Narrow Band FM Transmitter

    Leading RF module designer and manufacturer Radiometrix Ltd, has launched a new range of highly flexible, frequency programmable, RF power adjustable radios. The new NTX2B Transmitter offers industry-leading true Narrow Band FM performance and is available on user/factory programmable custom frequencies between 425MHz and 470MHz. Superseding the popular NTX2, the new transmitter offers greater stability and improved performance due to VCTCXO reference. The NTX2B provides users with the ability to dynamically re-program the module via microcontroller UART to other channel frequencies in the band or store new frequency/power settings on EEPROM.


    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)
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