Eldes ESIM384 - 40. Sms Commands - Appendix 3; 41 Radio System Installation and Signal Penetration

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ESIM384 Installation and Conguration Manual v1.1
41. RADIO SYSTEM INSTALLATION AND SIGNAL PENETRATION  APPENDIX 4
WHAT YOU MUST KNOW BEFORE INSTALLING THE SYSTEM
Radio signals are electromagnetic waves, hence the signal becomes weaker the further it travels, the range is limited.
Level %
100
80
60
40
20
0
The following material shows theoretically evaluated relation between radio signal strength and the distance among devices.
The radio coverage is further decreased by specic materials:
Material
Wood, plaster, glass uncoated, without metal
Brick, press board
Ferro concrete
Metal, aluminium lining
Range reduction vs LoS*
0 - 10 %
5 - 35 %
10 - 90 %
see chapter “How to prop-
erly install the system”
* LoS (Short for “line of sight”) - a term being used in Radio frequency technologies to describe an unobstructed path between the location
of the signal transmitter and the location of the signal receiver.
The following should be accepted as suggestions and evaluated while installing your system:
• During the night time, when there is no movement at all, wireless signal level can decrease up to 17%.
• Furniture and movement can increase or decrease signal level by approximately up to 20%.
So, that means the sensor’s signal level can decrease up to about 37% or even increase slightly, depending on individual environmental
factors.
Spread of radio signal within a building:
13.60 m
20 m
Signal
Strength
high
low
Base station
Sender
HOW TO PROPERLY INSTALL THE SYSTEM:
NOTE: It is HIGHLY RECOMMENDED to install your system with the Service Mode enabled (using Conguration software). This instal-
lation method will ensure a better protection against variable environmental factors ( the number of people moving throughout the
secured area, material obstacles, etc.).
• Clear RF path of obstructions - Make sure the RF path is clear of obstructions. Antennas should be installed where they can “see” each
other as much as possible. Make sure the antennas are high enough above any obstructions in the RF path.
• Pay attention to antenna alignment - Make sure the antennas are aligned correctly. In order to get the best result, you should mount
your sensor according to their own manual’s instruction, which you’ll nd at eldesalarms.com
• Know you overall system gain required to meet the distance. The more the distance between the radios, the more the overall system
gain needs to be. If the signal level between the system and your wireless device is equal or lower than 30%, then you must additionally