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Take into account interference from adjacent cells when the DECT system is installed in a
multi-storey building (Hot Spot).
Take into account the following characteristics of radio waves.
- Body effect:
The RSSI and Q values may differ depending on the location of the handset on the hu-
man body.
- Speed of moving handset:
The RSSI and Q values may fluctuate if a handset moves at speed.
- Line of sight:
Much more consideration is required when a Base Station is to be installed in a wide-
open area.
- Multi-storey deployment:
Characteristics of cells in each storey may differ due to the structure and materials of the
building.
Information Required
Obtain a map of the site
Note the general construction materials used in walls and doors of the building(s), including
window coating and covering, if any. Also note any large metal objects such as equipment,
doors, and fluorescent lamp shades. In general, radio frequency (RF) signals are attenu-
ated to some degree when passing though materials. Some materials, such as metal, at-
tenuate RF signals to a higher degree.
the number of handset users and which are the high traffic areas, such as confer-
Define
ence rooms, cafeterias and manufacturing departments.
Check which positions allow and prohibit Base Station installation.
Determine the required coverage areas, such as elevators, stairwells, toilets, outdoor areas
etc.
Establish the position of the DECT system and available cabling.
Tools Needed for Site Survey
DECT Demonstration and Installation Kit
Handsets (D-5000): 2
Base Station (RFP)
Sound source (CD player and headset)
Tape measure
Map of the building
Part 1: Site Survey and Overview of DECT Systems
.
(See Table 1,
above.)
4
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