User's Manual

4. HINTS FOR INTEGRATING THE MODEM
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LZT 123 7361 R1A
Securing the modem
• Before securing the modem take into account the amount of
additional space required for the mating connectors and cables that
will be used in the application.
• Where access is restricted, it may be easier to connect all the cables
to the modem prior to securing it in the application.
• Securely attach the GM29 modem to the host application using two
3mm diameter pan-head screws of appropriate length as shown
below.
Caution! Do not exceed a torque of 25Ncm when tightening the fixings screws.
Excessive torque applied to the screws can crack the plastic case.
4.3 Antenna
4.3.1 General
The antenna is the component in your system that maintains the radio
link between the network and the modem. Since the antenna transmits
and receives electromagnetic energy, its efficient function will depend
on:
• the type of antenna (for example, circular or directional);
• the placement of the antenna;
• communication disturbances in the vicinity in which the antenna
operates.
In the sections below, issues concerning antenna type, antenna
placement, antenna cable, and possible communication disturbances are
addressed.
In any event, you should contact your local antenna manufacturer for
additional information concerning antenna type, cables, connectors,
antenna placement, and the surrounding area. You should also