The UDR700 receiver uses a proprietary technique to implement a unique and very effective type of diversity reception called Rota-VersityTM.
Rota-versity is a microprocessor controlled antenna phase matching technique. The UDR700 uses a four way phase shifter to combine the power of the two antennas in any of four phase angles, 90 degrees apart. Hundreds of times per second, all of the four phase angles are tried. The angle offering the best reception is always used for the audio data. The result is that the diversity system “tracks” the phase shifts between the two antennas, keeping phase cancellation loss under 1 dB at all times. Multi-path dropouts are minimized and operating range is maximized by using both antennas, in phase, at all times.
