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4. MECHANICAL INSTALLATION
4.1 INSTALLATION RESTRICTIONS AND LIMITATIONS
In order to properly install the SR500 and integrate it into an active, efficiency protection system, it is
imperative that the user will first understand some basic rules regarding radars in general and specifically
regarding the SR500. Prior to sensor installation it is imperative that the user reads the following list of
limitations and restrictions and ensures that the intended installation site is suitable for installation. When in
doubt please consult with Magos representatives.
The following limitation and restriction should be considered prior to installation:
Environment: Radars are based on line-of-sight detection. Any obstacles hiding or partially hiding
areas from the radar will not be properly protected. This include obvious obstacles such as walls,
buildings, hills etc, but also includes less obvious obstacles such as light foliage, low bushes etc.,
where target is only partially obscured from the radar. In such case detection performance is
reduced.
While the SR500 features "zero-doppler" detection, maximum detection ranges for tangent moving
targets (moving targets that remain at a constant or near constant distance from the radar) or for
crawlers are typically reduced compared to radial moving targes. This occurs in areas that are not
clear of obstacles such as bushes, trees and other vegetation.
The SR500 does not implement target classification –which means that cars, human walker large
animals and sometimes small animals are all declared as targets.
The SR500 instrumental resolution in azimuth is ~5°, and in range it is ~0.4m. Therefore target
separation capabilities are ~1m in range and 7° in azimuth. This means that two or more targets
moving within less than 1m difference in range from each other and less than 7° will be declared
as single target, and the reported location will be near the center of the group. Note that for single
target location accuracy is much better than resolution, and reach less than 1° in azimuth and
approximately 0.1m in range.
As mentioned earlier the SR500 might exhibit disturbances and "ghost" targets as a result of large
returned signals. This occurs when a very large target (car/ turck etc.) moves in the vicinity of the
radar (30m away or less, and 5m away or less for human targets) even outside the stated
coverage area. Therefore it is recommended to install the sensor in unpopulated, isolated spots
(or alternatively use high poles to distance the radar from ground movement).
The SR500 in similar to all radar based technologies relies on returned signal to interpret target
location. If the coverage area contains metallic objects (cars, large pipes, fences etc) or non-metal
surface (straight walls, buldings) this might result in multiple reflections (in similar to looking at a
mirror) from a signal target, arriving at the radar from multiple angles. This means, for example,
that if the radar is set to protect and area containing a metallic fence, a target moving at one side
of the fence might be detected by the radar as 2 targets moving from both sides of the fence.
In general water is non-transparent to RF signals. A consequence of this fact is that when the
SR500 is positioned to cover an area containing large bodies of water, large waves and other
disturbances in the surface of the water might be interpreted by the radar as moving targets.
