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TXL2

Description
UHF Multi Channel Transparent Data Link TX/RX
File Size375KB,11 Pages
ManufacturerETC
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TXL2 Overview

UHF Multi Channel Transparent Data Link TX/RX

EW
N
Issue 1, 30 April 2007
Radiometrix
Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England
Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233
TXL2/RXL2
UHF Multi Channel Transparent Data Link TX/RX
The TXL2 and RXL2 modules are 9600baud
simplex multi channel OEM radio modems
in a Radiometrix SIL standard footprint,
operating on European 433MHz ISM band.
The TXL2/RXL2 pair act as a transparent
serial cable to attached host. Unlike raw
FM radio modules (e.g. TX2A/RX2A),
TXL2/RXL2 will take care of preamble,
synchronisation, bit balancing and error
checking along with automatic noise
squelching.
Figure 1: TXL2-433-9/RXL2-433-9
The TXL2/RXL2 pair provides a one-way radio link. Provided no two devices attempt to transmit
simultaneously no further restrictions on data transmission need be made, as all transmit timing, valid
data identification and datastream buffering is conducted by the units. Synchronisation and framing
words in the packet prevent the receiver outputting garbage in the absence of wanted RF signal or
presence of interference. For multiple radio systems a TXL2/RXL2 can be set to 1 of 8 unique addresses.
As well as having unique addresses, the TXL2/RXL2 allow operation on one of 5 pre-set frequencies in
the 433MHz band. These frequencies are non-overlapping and simultaneous operation of TXL2/RXL2
pairs in the same area on different channels will be possible. Units are supplied on 433.925MHz (Ch0)
as default.
Features
Conforms to EN 300 220-3 and EN 301 489-3
High quality, stable crystal reference
Low noise synthesiser / VCO
SAW front-end filter
Multi-stage ceramic IF filtering
Single conversion superhet
Serial modem baud rate at 9600bps (simplex)
Addressable point-to-point
5 serial select wideband channels
Applications
PDAs, organisers & laptops
Handheld / portable terminals
EPOS equipment, barcode scanners
In-building environmental monitoring and control
Remote data acquisition system, data logging
Fleet management, vehicle data acquisition
Technical Summary
Operating frequency: 433.925MHz (default)
Modulation: 16kbps bi-phase FSK
Supply: 5V at 28mA transmit, 22mA receive/idle
Transmit power: +10dBm (10mW)
Receiver sensitivity: -107dBm (for 1% BER)
32 byte data buffer
Adjacent channel rejection: 60db @ ±320kHz
Receiver Blocking: >75dB
TXL2/RXL2 Data Sheet
page 1
Radiometrix Ltd

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TXL2 RXL2 RXL2-433-9 TXL2-433-9 RXL2-433-4
Description UHF Multi Channel Transparent Data Link TX/RX UHF Multi Channel Transparent Data Link TX/RX UHF Multi Channel Transparent Data Link TX/RX UHF Multi Channel Transparent Data Link TX/RX UHF Multi Channel Transparent Data Link TX/RX
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