The RX3G is a PLL synthesiser based miniature PCB mounted UHF radio data receiver device. When used in conjunction with Radiometrix’ matching TX3B-869-64 transmitters it can facilitate the simple implementation of wireless infrastructure that is capable of supporting speeds of 64kbits/s and transmission ranges up to 75m in-building or 300m over open ground. The device has a receive sensitivity of -102dBm at 1ppm BER for 64kbits/s operation and -108dBm sensitivity at 1ppm BER for 15kbits/s operation. It incorporates a wide range RSSI (Received Signal Strength Indicator) which measures the strength of an incoming signal over a range of approximately 50dB. This allows assessment of the link quality and available margin with which the network can operate, so that a judgment on what distances can be supported is easy for the engineer to make. It requires a regulated 5V supply with ripple content of less than 100mV peak-to-peak.