AVIXA Recognized AV Technologist Test

A diversity receiver uses a pair of antennas to _____.

1. Cancel noise from electromagnetic interference during signal transport

2. Detect very high frequency radio waves

3. Receive signals from two frequencies at once

4. Select the strongest or most direct RF signal over reflections of the same signal

The correct answer is: Select the strongest or most direct RF signal over reflections of the same signal

A diversity receiver employs a pair of antennas to enhance the reliability and quality of wireless communication by selecting the strongest or most direct radio frequency (RF) signal while minimizing the impact of reflections and multipath interference. When transmissions occur, signals can be reflected off various surfaces, causing multiple versions of the same signal to arrive at the receiver at slightly different times and phases. This phenomenon can lead to constructive or destructive interference, which may degrade the signal quality. The use of two antennas allows the receiver to compare the incoming signals and choose the one that is most likely to provide the best quality, thereby improving the overall performance of the wireless system. By ensuring that the receiver is always using the strongest available signal, it mitigates issues related to fading and provides a more stable connection, which is crucial in professional audio and video applications where signal integrity is essential. This principle of spatial diversity is instrumental in achieving better signal reception, especially in environments with potential interference or signal degradation.