Eldes ESIM384 Installation Manual page 196

• Wrong antenna mounting by the ceiling:
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 ESIM384
device
• 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:
>20 cm
Metal box or
any metal
• 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
Metal
sheet
196 196 EN
Ceiling
Wireless
device
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
eSIM384
Alarm
System
Wireless
device
Wall
Wireless
device
ESIM384 Installation and Configuration Manual v1.1