4. HINTS FOR INTEGRATING THE MODEM
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
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
41
LZT 123 7361 R1A
