196
196 EN
ESIM384 Installation and Configuration Manual v1.1
•
Wrong antenna mounting by the ceiling:
Ceiling
W
all
W
all
Ceiling
•
Massive objects made of metal, such as metallic separation walls and metal inserted ceilings, massive wall reinforcements and the metal
foil of heat insulations, reflect electromagnetic waves and thus create what is known as radio shadow. However singularized small metal
studs, e.g. the metal studs of a gypsum dry wall, don’t show a recognizable screening.
•
Internal antenna, mounted on metal surfaces (typically 30% loss of range)
•
Using any type of antenna inside metallic frames (typically 30% loss of range)
Antenna
Wireless
device
Wireless
device
Wireless
device
ESIM384
0.5 m to 30 m
(1.64 to 98.43ft)
inside the building
0.5 m to 150 m
(1.64 to 492.13ft)
in open areas
Recommended installation:
•
face the front side of the wire-
less device towards the an-
tenna
•
keep the distance: 0,5 to 30m
(1.64 to 98.43ft) inside the
building, 0,5 to 150m (1.64 to
492.13ft) in open areas
•
Keep the distance of at least 20cm (7.87in) or more between your wireless device/Alarm System and the metal box/metal sheet or any
object of this material:
Metal box or
any metal
eSIM384
>20 cm
•
Metal separation walls: It can be noticed that radio transmission even works with metal indoor separation walls. this happens through
reflections: Walls made of metal or concrete reflect the electromagnetic waves. the radio waves reach the next room or floor via a non
metallic opening.
Wall
Wall
Metal
sheet
Alarm
System
Wireless
device
