LMT1 Datasheet, PDF (1/10 Pages) Radiometrix Ltd – VHF Narrow Band FM Low Cost multi channel radio modules

NEW
Radiometrix
Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England
Issue 1, 06 March 2008
Tel: [phone], Fax: [phone]
LMT1/LMR1
VHF Narrow Band FM Low Cost multi channel radio modules
The LMT1 transmitter and LMR1
receiver modules offer a multi channel,
low power, and reliable VHF data link.
This makes the LMT1/LMR1 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: LMT1 transmitter and LMR1 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)
• 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: 173.200 - 173.325MHz (UK band)
150.825 - 152.450MHz (Australian Band)
• Other VHF frequencies available
• 4 UK allocation channels (32 maximum)
• Transmit power: +10dBm (10mW) nominal @ 3.1V (Adjustable 1 - 25mW)
+20dBm (100mW) nominal @ 4.1V (Adjustable 25 - 100mW)
• Supply range: 3.1 – 15V (@10mW) transmitter and receiver
• 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
LMT1/LMR1 Data Sheet
page 1