LMT0

27MHz HF Narrow Band FM multi channel Transmitter

Frequency:26 - 28MHz

The LMT0 transmitter and LMR0 receiver modules offer a 10kHz channel spacing multi channel, low power, and reliable HF data link. This makes the LMT0/LMR0 pair ideally suited to those low power applications where existing wideband modules have insufficient range, or where low cost multi-channel operation is needed without compromising on RF specification or regulatory requirement

Features

  • Conforms to EN 300 220-2 and EN 301 489-3
  • High performance double superhet. PLL synthesizer with TCXO
  • quasi-dc (peak sampling) data recovery circuit (for enhanced performance on unbalanced datastreams)
  • Data rates up to 4 kbps for standard module
  • Usable range over 1km
  • Fully screened. Low profile
  • Feature-rich interface (RSSI, analogue and digital baseband)
  • Re-programmable via UART interface
  • Low power requirements

Applications

  • Radio Control (R/C) Radio Service under FCC Part 95 subpart C
  • Controlling the movement of the model, in the air, on land or over or under the water surface
  • Non-specific Short Range Devices (SRD) - Telemetry, Telecommand, Alarms and Data in general

Technical Summary

  • Operating frequencies: 10mW 26.957-27.283MHz Non-specific Short Range Devices (SRD); 100mW 26.995, 27.045, 27.095, 27.145, 27.195 MHz Model Control; Any 0.5MHz wide sub-band in 26-28MHz
  • Transmit power: +10dBm (10mW) nominal @ 4.1V (factory adjustable 1 - 25mW)
  • Receiver sensitivity: -115dBm (for 12 dB SINAD)
  • Supply range: 4.1V – 15V Transmitter; 3.1V – 15V Receiver
  • Current consumption: 40mA @ 10mW Transmit; 20mA Receive
  • Data bit rate: 4kbps max.