ImmersionRC Duo 5800 v4.2 A/V Diversity Receiver (Race Edition)

One of the challenges of video downlinks on high frequency bands, such as 5.8GHz, is the signal breakup due to multipathing. 'Nulls' in the received signal occur when the direct signal from the transmitter arrives at the same time as a reflected signal, which happens to be 180 degrees out of phase with the direct signal. Smart antenna design, such as ImmersionRC's circular Smart, suchantennpolarized 'SpiroNET' antenna family, can reduce this effect, but it cannot completely eliminate it. The Duo5800v4, the fourth in ImmersionRC's series of 5.8GHz diversity receivers, can significantly improve reception in the presence of multipathing, by intelligently switching between two independent receivers when signal quality drops. Another useful application of diversity switching is to select the best signal from two antennas, for example, one omnidirectional, and one directional, or a couple of directional antennas pointing in different directions. Version 4.1 of the Duo5800 now comes with sele