Silex technology Multicast Video Distribution System MVDS X-1 - Manual (Page 37)

2.Installation
31
Vertical coverage and Line-of-sight
From a vertical convergence point of view, less height difference is better to
minimize distance problems. However, it also creates more Non-Line-Of-Sight
(NLOS) problems.
In this diagram, the other side of the office building could not covered by single
TX antenna, so another TX set needs to be provided if there are other stations
there.