A diversity antenna system can be compared to a switch that selects
>antenna or another, never both at the same time. The radio in receive
>will continually switch between antennas listening for a valid radio
>packet. After the beginning sync of a valid packet is heard, the radio
>evaluate the sync signal of the packet, on one antenna, then switch to
>other antenna and evaluate. Then the radio will select the best
>and use only that antenna for the remaining portion of that packet.
>On transmit, the radio will select the same antenna it used the last
>it communicated to that given radio. If a packet fails, it will switch
>the other antenna and retry the packet.