HINTS FOR INTEGRATING THE RADIO DEVICE
55
LZT 123 8020 R1A
•
In the final application, the antenna must be positioned more
than 20 cm away from human bodies. When this rule cannot
be applied, the application designer is responsible for
providing the SAR measurement test report and declaration.
•
Even if SAR measurements are not required, it is considered
good practice to insert a warning in any manual produced,
indicating it is a radio product and that care should be taken.
7.2 Installation of the Radio Device
7.2.1
Where to Install the Radio Device
There are several conditions which need to be taken into
consideration when designing your application as they might
affect the radio device and its function. They are:
Environmental Conditions
The radio device must be installed so that the environmental
conditions stated in the Technical Data chapter, such as
temperature, humidity and vibration are satisfied. Additionally,
the electrical specifications in the Technical Data section must
not be exceeded.
Signal Strength
The radio device has to be placed in a way that ensures
sufficient signal strength. To improve signal strength, the
antenna can be moved to another position. Signal strength may
depend on how close the radio device is to a radio base station.
You must ensure that the location at which you intend to use
the radio device, 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. More information about
possible communication disturbances can be found in section
7.3.5 page 58.
When an application is completed, you can verify signal
strength by issuing the AT command AT+CSQ. See the AT
Commands Manual for further details.
Note!
Before installing the radio device, use an ordinary mobile
telephone to check a possible location for it. In determining the
location for the radio device and antenna, you should consider
signal strength as well as cable length
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