Frequency Programmable 25kHz NBFM VHF Transceiver

Frequency:144 - 146MHz

The narrow band AiM1 transceiver offers a low power, reliable data link in a Radiometrix transceiver standard pin out and footprint. The AiM1 is a frequency programmable, narrowband design, suitable for licensed and unlicensed VHF allocations and 2M amateur band applications.



  • Conforms to EN 300 220-3 and EN 301 489-3 (10mW version only)
  • Standard frequency 144.390MHz
  • Other frequencies from 120MHz to 175MHz: see BiM1B
  • Data rates up to 5kbps for standard module
  • Usable range over 1km
  • Low power requirements
  • 25kHz Channel spacing
  • Feature-rich interface (true analogue and/or digital baseband)




  • Amateur radio
  • APRS systems
  • Packet operation
  • FM simplex telephony
  • Repeater monitoring


Technical Summary

  • Fully integrated sigma-delta PLL synthesizer based design
  • High stability TCXO reference
  • Data bit rate: 5kbps max.
  • Transmit power: +13dBm (20mW)
  • Image rejection: >70dB
  • Receiver sensitivity: -120dBm (for 12dB SINAD)
  • RSSI output with >50dBm range
  • Supply: 3.3V - 15V @ 30mA transmit, 18mA receive
  • Dimensions: 33 x 23 x 9mm
Evaluation platforms: NBEK + BiM / SMX carrier