The BlueCats 4100 Ultra-Wideband (UWB) reader receives 7.3 GHz signals emitted by BC2111 and BC2112 Tags. 

After receiving the signal, the BC4100 measures the time of arrival (ToA) and sends it to the Synchronization Distribution Panel (SDP). A tag’s precise location is calculated from the combined difference in time of arrivals (TDoA) from multiple readers. 

The BC4100 acts only as a receiver and does not transmit any signal. It uses directional antennas to cover specific areas of your site or omnidirectional antennas for more general coverage.