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PDF LMR2 Data sheet ( Hoja de datos )
| Número de pieza | LMR2 | |
| Descripción | UHF Narrow Band FM Low Cost multi channel radio modules | |
| Fabricantes | Radiometrix | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LMR2 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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NEW Radiometrix
Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England
Issue 2, 01 November 2007 Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233
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
• 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
Radiometrix Ltd
LMT2/LMR2 Data Sheet
page 1
Free Datasheet http://www.datasheet4u.com/
1 page  
Figure 5: LMR2 footpint (top view)
Pin description – LMR2
Pin Name
1a Vcc
2a 0V
3a RXE
4a RXD
5a AF out
Function
3.1 – 15V power supply
Ground
Receiver Enable (active high)
Data out (open collector, no pullup)
700mV p-p audio. DC coupled, approx 0.8v bias.`
1b P0/PGM
2b P1
3b P2
4b P3
5b RSSI
Parallel Channel select LSB
Serial frequency programming / configuration1
Parallel Channel select
Parallel Channel select
Parallel Channel select MSB
DC level between 0.5v and 2.2v. 60dB dynamic range
NOTES:
1. Serial programming is by an inverted, cmos logic level, 2400 baud RS232 datastream applied to
the P0 pin.
2. Channel select inputs have pullups (50kΩ) to 3v internal rail. Do not exceed 3v logic levels on
this port.
3. Channel select inputs are active low
4. All pins are on an 0.1" grid
5. Data recovery circuit used for RXD is not a simple 'average and compare' type. It is a peak
sampling quasi-DC coupled design, allowing a greater than usual flexibility in data format.
6. Unit will operate (with marginally reduced specifications) from a 3.0v rail. This must be well
regulated and without noise or ripple, as in this state the unit's internal regulator no longer
operates, and provides no supply rejection.
Radiometrix Ltd
LMT2/LMR2 Data Sheet
page 5
Free Datasheet http://www.datasheet4u.com/
5 Page 
Radiometrix Ltd
Hartcran House
231 Kenton Lane
Harrow, Middlesex
HA3 8RP
ENGLAND
Tel: +44 (0) 20 8909 9595
Fax: +44 (0) 20 8909 2233
www.radiometrix.com
Copyright notice
This product data sheet is the original work and copyrighted property of Radiometrix Ltd. Reproduction in whole or
in part must give clear acknowledgement to the copyright owner.
Limitation of liability
The information furnished by Radiometrix Ltd is believed to be accurate and reliable. Radiometrix Ltd reserves the
right to make changes or improvements in the design, specification or manufacture of its subassembly products
without notice. Radiometrix Ltd does not assume any liability arising from the application or use of any product or
circuit described herein, nor for any infringements of patents or other rights of third parties which may result from
the use of its products. This data sheet neither states nor implies warranty of any kind, including fitness for any
particular application. These radio devices may be subject to radio interference and may not function as intended if
interference is present. We do NOT recommend their use for life critical applications.
The Intrastat commodity code for all our modules is: 8542 6000.
R&TTE Directive
After 7 April 2001 the manufacturer can only place finished product on the market under the provisions of the
R&TTE Directive. Equipment within the scope of the R&TTE Directive may demonstrate compliance to the
essential requirements specified in Article 3 of the Directive, as appropriate to the particular equipment.
Further details are available on The Office of Communications (Ofcom) web site:
http://www.ofcom.org.uk/radiocomms/ifi/
Information Requests
Ofcom
Riverside House
2a Southwark Bridge Road
London SE1 9HA
Tel: +44 (0)845 456 3000 or 020 7981 3040
Fax: +44 (0)20 7783 4033
European Radiocommunications Office (ERO)
Peblingehus
Nansensgade 19
DK 1366 Copenhagen
Tel. +45 33896300
Fax +45 33896330
www.ero.dk
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet LMR2.PDF ] | |
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