HINTS FOR INTEGRATING THE RADIO DEVICE
56
LZT 123 8020 R1A
Connection of Components to Radio Device
The integrator is responsible for the final integrated system.
Incorrectly designed or installed, external components may
cause radiation limits to be exceeded. For instance, improperly
made connections or improperly installed antennas can disturb
the network and lead to malfunctions in the radio device or
equipment.
Network and Subscription
•
Before your application is used, you must ensure that your
chosen network provides the necessary telecommunication
services. Contact your service provider to obtain the
necessary information.
•
If you intend to use SMS in the application, ensure this is
included in your (voice) subscription.
•
Consider the choice of the supplementary services
described in section
2.3.2 Short Message Service, page 10.
7.2.2
How to Install the Radio Device
Power Supply
•
Use a high-quality power supply cable with low resistance.
This ensures that the voltages at the connector pins are
within the allowed range, even during the maximum peak
current. An electrolytic capacitor should be placed close to
the power supply pins of the radio device to supply the peak
currents during burst transmission. See
5.4 VCC -
Regulated Power Supply Input.
•
See
section
5.2.1 General Protection Requirements, page
24.
Grounds
A ground connection is provided at the mounting hole next to
the RF connector on the radio device (see figure 5.1, page 20).
Connect this ground point to the DGND pins of the radio device
by the shortest, low-impedance path possible. The purpose of
this connection is to allow any ESD picked up by the antenna to
bypass the radio device’s internal ground path.
Note!
It is recommended that you use a cable with a maximum
resistance of 5 m
Ω
for the ground connection.
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