LMT2_14 Datasheet, PDF (1/11 Pages) Radiometrix Ltd – UHF Narrow Band FM Low Cost multi channel

Hartcran House, 231 Kenton Lane, Harrow, Middlesex, HA3 8RP, England
Tel: [phone], Fax: [phone], www.radiometrix.com
LMT2 / LMR2
Issue 1, 21 January 2013
UHF Narrow Band FM Low Cost multi channel
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.
Features
Figure 1: LMT2 transmitter and LMR2 receiver
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
Evaluation platforms: NBEK + LM Series carrier
Radiometrix Ltd
LMT2/LMR2 Data Sheet
page 1