TDL2

www.DataSheet4U.com W E N Radiometrix Hartcran House, Gibbs Couch, Watford, WD19 5EZ, England Tel: +44 (0) 20 8428 1220, Fax: +44 (0) 20 8428 1221 Issue B, September 2004 TDL2 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. Figure 1: TDL2 radio modem 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-...