LMR1 - Radiometrix

LMR1 VHF Narrow Band FM Low Cost multi channel radio modules

– LMT1 Pin Name 1a Vcc 2a 0V 3a TXE 4a TXD 5a No pin Function 3.1 – 15V power supply (10mW) 4.1V – 15V power supply (100mW) Ground Transmit Enable (active low) DC coupled input for 3V CMOS logic. Rin=47kΩ Not present in LMT1 1b P0/PGM 2b P1 3b P2 4b P3 5b No pin Parallel Channel select LSB Serial frequency programming / configuration1 Parallel Channel se.

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 telecom.