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The FPX3-869-20 high-data-rate transceiver from Radiometrix is suited for industrial telecommand tasks, machine control, fast, long-range data modems and robotic/mechatronic control functions.

This versatile radio module makes use of the pan-European high-power 869.4-869.65MHz allocation to offer half-watt RF power output in a 67 x 30 x 12mm footprint.

Combined with its sensitive (-115dBm) high-specification (80dB blocking) receiver circuits, this adds up to an adaptable data link device that is capable of achieving a range of over 3km.

The basic 20kb/s module operates on one of two user-selectable channels (869.475, 869.565MHz) and features very fast (under 3msec) rx-to-tx switching time.

Future releases will include wider (64kb/s, one-channel) and narrower-band (5kb/s, eight-channel) versions, while the FPX3 also shares a basic pin-out with a range of VHF and UHF modules in the SHX and USX ranges.

An adaptable user interface is provided, giving complete control over the module operation via a simple serial port, as well as additional functions such as analogue baseband I/O and an RSSI signal.

Only a single 5V supply is needed, the module drawing 50mA in receive and under 450mA (for 26dBm output) on transmit.

The FPX3 transceiver is ideally suited for applications where other frequency bands are too congested, or low transmit power limits yield insufficient range or reliability.

All FPX3 versions comply with ETSI EN 300 220-3 and EN 301 489-3, for unlicensed operation throughout Europe.

Pioneers of Low Power Radio – Since 1985

Based in the UK, Radiometrix is recognised as the leading global developer of ISM Band/ SRD FM low power radio modules.

We design and manufacture high-quality and cost-effective VHF and UHF radio modules that cater for the wireless needs of OEMs worldwide. Available on all major frequencies (151, 169, 173, 433, 458, 868 & 914 MHz), we offer a wide variety of modules to suit a diverse range of licence-exempt and licenced applications. The off-the-shelf modules can be customised to meet specific requirements.

Product portfolio

  • 12.5kHz, 25kHz Narrow Band & Wide Band FM
  • Transmitters, Receivers, Transceivers & RF Modems
  • Single-channel and Multi-Channel operation
  • 151, 169, 173, 433, 458, 868 & 914 MHz
  • UHF & VHF ISM bands
  • FCC Part 90 Compliant, FCC Part 15 compliant
  • Class 1 performance
  • Encoders & Decoders for RF remote control
  • Radio Packet Modems
  • Radio Packet Controllers
  • Evaluation Kits
  • Accessories – Antennas & Connectors


    Why Radiometrix?

    • Products designed and manufactured to the highest standards
    • Superior RF Performance, low power requirements
    • Radiometrix products are designed and verified to fully comply with FCC/ETSI or regional radio standards.RoHS Compliant
    • RoHS Compliant radio modules (lead-free)
    • Comprehensive portfolio of products
    • We test every single module


    • In-house technical support prior to, during and after sales
    • Custom design – in-house R&D and design
    • Long term availability of our products
    • Highly competitive volume pricing – contact Sales for quotations
    • Reduced time-to-market
    • Flexibility – we will do our very best to find a solution that meets your requirements

    Expertise – Low Power Radio is what we do

    • Over 25 years experience specialising in low power radio
    • Reputation for technical excellence
    • Team of leading RF industry engineers 

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