User's Manual

4. HINTS FOR INTEGRATING THE MODEM

LZT 123 7361 R1A

• When the SIM card hatch is opened, the SIM card connectors lie

exposed under the SIM card holder. CAUTION: Do not touch these

connectors! If you do, you may release an electrical discharge that

could damage the modem or the SIM card.

• When designing your application, the SIM card’s accessibility

should be taken into account. We always recommend that you have

the SIM card protected by a PIN code. This will ensure that the SIM

card cannot be used by an unauthorized person.

4.1.3 Antenna

• If the antenna is to be mounted outside, consider the risk of

lightning. Follow the instructions provided by the antenna

manufacturer.

• Never connect more than one modem to a single antenna. The

modem can be damaged by radio frequency energy from the

transmitter of another modem.

• Like any mobile station, the antenna of the modem emits radio

frequency energy. To avoid EMI (electromagnetic interference), you

must determine whether the application itself, or equipment in the

application’s proximity, needs further protection against radio

emission and the disturbances it might cause. Protection is secured

either by shielding the surrounding electronics or by moving the

antenna away from the electronics and the external signals cable.

• The modem and antenna may be damaged if either come into contact

with ground potentials other than the one in your application.

Beware, ground potential are not always what they appear to be.

• In the final application, the antenna must be positioned more than

20cm away from human bodies. When this rule cannot be applied,

the application designer is responsible for providing the SAR

measurement test report and declaration.

4.2 Installation of the Modem

4.2.1 Where to Install the Modem

There are several conditions which need to be taken into consideration

when designing your application as they might affect the modem and its

function. They are:

Environmental Conditions

The modem 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.