Radiometrix
Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England
Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233
Issue 2, 01 November 2007
LMT2/LMR2
UHF Narrow Band FM Low Cost multi channel radio modules
The LMT2 transmitter and LMR2
receiver modules offer a multi channel,
low power, and reliable data link. 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.
Figure 1: LMT2 transmitter and LMR2 receiver
Features
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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)
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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
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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
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Operating frequency: 433.875-434.650MHz (EU band)
458.525 - 459.1MHz (UK band)
Other custom UHF bands
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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
Radiometrix Ltd
LMT2/LMR2 Data Sheet
page 1
RADIOMETRIX [ RADIOMETRIX LTD ]
