Radiometrix Ltd
TDL2 Data Sheet
page 1
The TDL2 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. There is no Transmit Enable pin like BiM2.
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
TDL2 can be set to 1 of 8 unique addresses (by default all units are shipped set to address 0).
Features
•
433MHz version conforms to EN 300 220-3 and EN 301 489-3
•
Crystal controlled PLL stabilised VCO
•
SAW front-end filter
•
Single conversion superhet
•
Serial baud rate at 9600bps (half-duplex)
•
Addressable point-to-point
•
Data Present indication
•
Fully screened. Low profile
Applications
•
Handheld terminals
•
EPOS equipment, barcode scanners
•
Data loggers
•
Industrial telemetry and telecommand
•
In-building environmental monitoring and control
•
GPS systems
•
Vehicle data up/download
Technical Summary
•
Operating frequency: 433.925MHz
•
Modulation: 16kbps bi-phase FSK
•
Supply: 5V at 25mA transmit, 20mA receive/idle
•
Transmit power: +3dBm (2mW)
•
Receiver sensitivity: -105dBm (for 1% data error)
•
32 byte data buffer
•
Transmit power-up time: <4ms
UHF Transparent Data Link transceiver
UHF Transparent Data Link transceiver
UHF Transparent Data Link transceiver
UHF Transparent Data Link transceiver
The TDL2 is a 9600 baud half-duplex
OEM radio modem in BiM2 footprint,
operating on European 433MHz ISM
band. TLD2 acts as a transparent serial
cable to attached host. TDL2 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.
Radiometrix
Hartcran House, Gibbs Couch, Watford, WD19 5EZ, England
Issue B, September 2004
TDL2
NE
W
Tel: +44 (0) 20 8428 1220, Fax: +44 (0) 20 8428 1221
Figure 1: TDL2 radio modem
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