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PDF TDL2A Data sheet ( Hoja de datos )
| Número de pieza | TDL2A | |
| Descripción | UHF Transparent Data Link transceiver | |
| Fabricantes | Radiometrix | |
| Logotipo |  |
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Radiometrix
Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England
Issue 3, 06 October 2006
Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233
TDL2A
UHF Multi Channel Transparent Data Link Transceiver
The TDL2A is a 9600baud half-duplex multi
channel OEM radio modem in BiM2
footprint, operating on European 433MHz
ISM band. TLD2A acts as a transparent
serial cable to attached host. TDL2A is an
intermediate level OEM radio modem which
is in between a raw FM radio module like
BiM2 and a sophisticated OEM radio
modem like SPM2. It takes care of
preamble, synchronisation, bit balancing
and error checking along with automatic
noise squelching.
Figure 1: TDL2A-433-9 radio modem
The TDL2A provides a half duplex 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 unit. 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 (polled networks) a TDL2A can be set to 1 of 8 unique addresses. As well as
having unique addresses, the TDL2A allows operation on one of 5 pre-set frequencies in the 433MHz
band. These frequencies are non-overlapping and simultaneous operation of TDL2As 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 (half-duplex)
• Addressable point-to-point
• 5 serial select wideband channels
• Available as TDL2T transmitter and TDL2R receiver for one way communication
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: 65db @ ±320kHz
• Receiver Blocking: 84dB
Radiometrix Ltd
TDL2A Data Sheet
page 1
1 page  
www.DataSheet4U.com
Figure 4: TDL2A transmitting and receiving
The oscilloscope screen capture shows a single byte being transmitted by TDL2A. A BiM2-433-64
transceiver is used to capture the transmitted data The character appears on the serial data output
(RXD) pin of the other TDL2A after about 12.5ms. Busy (STATUS) pin is momentarily set high to
indicate the presence of a valid data in the receive buffer of the TDL2A.
It can be clearly seen that unlike raw radio modules, TDL2A does not output any noise when there is
not any transmission. Data fed into the TXD input of a TDL2A appears at the RXD output of another
TDL2A within radio range in the original form it was fed.
Figure 5: 16kbps Bi-phase encoded continuous data stream (expanded view)
Continuous serial data at 9600bps (above) is encoded as half-cycles of 8kHz (62.5µs long bit) and 16kHz
(31.25µs short bit).
Radiometrix Ltd
TDL2A Data Sheet
page 5
5 Page 
www.DataSheet4U.com
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
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| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet TDL2A.PDF ] | |
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