TXL2 Datasheet, PDF (1/11 Pages) List of Unclassifed Manufacturers – UHF Multi Channel Transparent Data Link TX/RX

NEW
Radiometrix
Issue 1, 30 April 2007
Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England
Tel: [phone], Fax: [phone]
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
Radiometrix Ltd
TXL2/RXL2 Data Sheet
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