LMR0 Datasheet, PDF (1/10 Pages) Radiometrix Ltd – 27MHz HF Narrow Band FM multi channel radio modules

Hartcran House, 231 Kenton Lane, Harrow, Middlesex, HA3 8RP, England
Tel: [phone], Fax: [phone], www.radiometrix.com
LMT0/LMR0
Issue 4, 5 August 2014
27MHz HF Narrow Band FM multi channel radio modules
The LMT0 transmitter and LMR0 receiver
modules offer a 10kHz channel spacing
multi channel, low power, and reliable HF
data link. This makes the LMT0/LMR0 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: LMT0 transmitter and LMR0 receiver
 Conforms to EN 300 220-2 and EN 301 489-3
 High performance double superhet. PLL synthesizer with TCXO
 6 channels (standard). Up to 16 parallel select or 32 serial select channels
 quasi-dc (peak sampling) data recovery circuit (for enhanced performance on unbalanced
datastreams)
 Data rates up to 4 kbps for standard module
 Usable range over 1km
 Fully screened. Low profile
 Feature-rich interface (RSSI, analogue and digital baseband)
 Re-programmable via UART interface
 Low power requirements
Applications
 Radio Control (R/C) Radio Service under FCC Part 95 subpart C
 Radio model control
 Telemetry and telecommand
 Wireless door entry systems
 Simple On/Off switching
 In-building environmental monitoring and control
 Security and fire alarms
 Vehicle/machinery controls
Technical Summary
 Frequencies:
10mW 26.957-27.283MHz Non-specific Short Range Devices (SRD)
100mW 26.995, 27.045, 27.095, 27.145, 27.195, 27.255MHz Remote control
 Transmit power:
 Receiver sensitivity:
 Supply range:

 Current consumption:
Any 0.5MHz wide sub-band in 26-28MHz
+10dBm (10mW) @ 4.1V; +20dBm (100mW) version also available
-115dBm (for 12 dB SINAD)
4.1V – 15V Transmitter
3.1V – 15V Receiver
40mA @ 10mW Transmit; 100mA @ 100mW Transmit
 Data bit rate:
20mA Receive
4kbps max.
Evaluation platforms: NBEK + LM Series carrier
Radiometrix Ltd
LMT0/LMR0 Data Sheet
page 1