UHF Narrow Band FM Low cost Multi Channel RF Modules : LMT2/LMR2

The LMT2 transmitter LMR2 receiver offer a low power, reliable data link in an industry standard pin out and foot print. This makes the LMT2/LMR2 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 300 220-3 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)
SAW front end filter
Data rates up to 5 kbps for standard module
Usable range over 1km
Fully screened. Low profile
Feature-rich interface (RSSI, analogue and digital baseband)
Re-programmable via RS232 interface
Low power requirements

Applications

Handheld terminals
EPOS equipment, barcode scanners
Data loggers
Industrial telemetry and telecommand
In-building environmental monitoring and control
High-end security and fire alarms
DGPS systems
Vehicle data up/download
Heavy vehicle/machinery controls

Technical Summary

Operating frequency: 433.875-434.650MHz (EU band)
458.525 - 459.1MHz (UK band)
Other custom UHF bands
32 channels
Transmit power: +10dBm (10mW) / +20dBm (100mW)
Supply range: 3.1 - 15V (TX @ 10mW and RX), 4.1 - 15V (TX @ 100mW)
Current consumption: 34mA @ 10mW, 90mA @ 100mW (transmit) and 20mA
receive)Data bit rate: 5kbps max. (standard module)
Receiver sensitivity: -118dBm (for 12 dB SINAD)
Serial configuration by inverted RS232 at 3V CMOS level