i-gsm02
Page 4
Siting the antenna
Before installing the unit you must decide on a suitable location for
the antenna. Site the antenna so that it can receive a good signal
from the phone network. Note that the supplied antenna lead is 3m
long.
Place the antenna:
As high as possible.
As far away from the control unit as possible.
At least 1 metre from any metalwork (pipes, cabinets, cabling,
cement reinforcing bars, metallic coated glass).
Vertically (see Figure 2).
So that the lead runs horizontally from the antenna for at least
250mm.
250mm
2,000 mm
No metal within
this area.
2,000 mm
Figure 2. Aerial Positioning
Checking network signal strength
There are three ways to check the network signal strength at your
installation:
1. Use the i-gsm02. You can temporarily fit the SIM card and
antenna to the i-gsm02 and fit the i-gsm02 module to the i-on40.
Caution: Follow the instructions in “Fitting the Module” on page .
You can then register the SIM card (see page 7). However, you
should be aware that unless the SIM is registered, the i-on40 will
report the strength of the strongest network signal. This may be an
emergency network. (In the UK, all networks must provide access
