Radiometrix TXL2 transmitter and RXL2 receiver modules

The TXL2 transmitter and RXL2 receiver modules, from Radiometrix, are half duplex multi-channel OEM modems offered in the company’s SIL standard footprint.

Operating in the European licence-free 433 MHz ISM frequency band, with a choice of five user-programmed channels, the modules can be used to form transparent one-way radio data links supporting data rates of 9600 bps over a line-of-sight range of 500 m (typical).

Unlike raw FM radio module alternatives, these modules take care of preamble, synchronisation, bit balancing, error checking and noise squelching, as well as all transmit timing, valid data identification and datastream buffering activities.

This allows a data link to set be set up with the minimum of effort. Each module can be assigned one of eight unique addresses, so that a multiple radio link network can be established, provided no two modules are attempting to transmit at the same time on same channel.

The transmitter has an output power of 10 dBm (10 mW), while the receiver has a sensitivity of -107 dBm. The modules require a 5 V power supply, drawing 28 mA for transmitting and 22 mA for receiving.