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Siretta Ltd
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Berkshire RG7 1PW
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46
ZETA-xxP Series
Hardware Manual
rev
D
Installation
Considerations for Installations Incorporating the ZETA-xxP
There are several conditions which need to be taken into consideration when
designing your application as they might affect the modem and its functionality. These
are:
Environmental conditions:
The modem must be installed so that the environmental
conditions stated such as temperature, humidity and vibration are satisfied.
Additionally, the electrical specifications must not be exceeded.
Cellular signal strength:
The modem/antenna has to be placed in a position that
ensures sufficient cellular signal strength. To improve signal strength, the antenna can
be moved to a more elevated position. Signal strength usually depends on how close
the modem is to cellular base station. You must ensure that the location at which
you intend to use the modem is within the network coverage area. Degradation in
signal strength can be the result of a disturbance from another source, for example an
electronic device in the immediate vicinity.
When the application is operational, you can verify signal strength by issuing the
AT command:
AT+CSQ
See “AT+CSQ Signal Strength” in the AT command manual
Tip: Before installing the modem you can use an ordinary mobile telephone to check the
signal strength in each possible installation location. Siretta can also provide a cellular signal
tester which provides a full breakdown of the cellular signal received.
*
When considering the location for the modem and antenna placement, you must
consider received signal strength as well as cable length as long cable runs can
attenuate the received signal strength.
Connections of components to ZETA-xxP Series modems:
The system integrator
is responsible for the final system solution. If external components are incorrectly
designed or installed it may cause radiation limits to be exceeded. For instance,
improper cable connections or incorrectly installed antennas can disturb the network
and lead to modem malfunction.
*
Please contact your Siretta representative for more information
