User's Manual

Bosch Security Systems, Inc.
Technical Manual
F.01U.306.750
Rev. 01
CHAPTER 5
Installation
Access Point Placement
Considerations
• Access Point Placement
• System Considerations - See System Drawings Chapter
• Mounting Options
• Mounting Surfaces
• Site Survey
Access Point Placement
The placement of access points can be critical for optimal RF performance of the system. When positioning the access points,
place them in the best location for maximum, unimpeded coverage of the area. Installation of the access point should be high,
above the area of interest, on a truss or ceiling. Tilt the antennas so they are approximately 15° to 30°. The access point could
also be placed high on a vertical wall; in this case, the antennas should pointing straight up.
Site Survey
For more information, see “Site Survey” on page 39.
RF (Radio Frequency) Considerations
Keep antennas away from metal, as metal can detune them and distort the RF pattern. It is recommended to keep the antennas
at least 2λ (2 * wavelength) from any parallel metal object (about 30 cm/12 inches), not including metal trusses or metal roofs.
A metal roof, metal trusses, or the access point’s metal case become a reflector, offering advanced coverage by reflecting the
RF signal down to the intended area of coverage, which can improve coverage. Note, when mounting to drywall, be aware of
metal studs that can affect signal quality. Metal in walls can greatly attenuate or even block RF signals. In the case of a metal
wall, it may become necessary to place another access point on the other side of the wall if continued coverage is desired.
The polarization of the access point antennas should match the polarization of the beltpack’s internal antennas when worn on
the belt. The standard position of the antennas are vertical. This means the electrical field of the antennas is also vertical. For
best reception, the access point’s antennas should be in the vertical position, either straight up or straight down.