INSTALLATION
DOC_DEV_SIG_ User guide_A
Page 21
6
Connecting the to the cellular network
6.1
Pre-installation checks
Authorization to use a cellular connection
Check the use of a cellular router is authorized.
Control of the reception level before installing
Before installing the SIG, refer to a cell map over the Internet to check that the cellular reception signal is strong
enough at the location where it will be installed.
Select the right mobile service provider.
Reception level confirmation
If the reception seems possible, confirm with a control on site.
The reception level can be measured with a smartphone.
Most smartphones provide the reception level information (parameters or diagnostic menu).
To carry-out that control, use mandatorily a SIM card subscribed with the mobile service provider selected for
the SIG.
Remark:
The SIG itself provides the reception level information in two ways:
A reception level led indicator
The diagnostic menu of the administration web server
6.2
Antenna
The antenna shall not be installed inside metal cases.
The antenna is supplied separately. Use only an approved antenna.
We provide a complete catalog of cellular antennas.
6.3
Coaxial cable
If necessary, the antenna can be connected to the SIG through a coaxial cable.
The signal attenuation in a usual coaxial cable is 0.2 to 0.4 dB / m, that is to say 2 to 4 dB for a 10 meters long
cable.
If a coaxial cable must be used to connect the antenna to the SIG, the attenuation in the cable has to be taken
into account to calculate the effective RF signal received by the SIG.
Refer to our cables and antennas catalogue.
