User's Manual

Confidential Document
Page 5 of 19
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From the following diagram, the AL7 GPS receiver receives incoming signals from each orbiting satellite.
These signals consist of information such as satellite’s position and the time that the signal was transmitted by
each satellite. The receiver analyzes these data in order to determine how far away each satellite is and it
uses the triangulation method to calculate the vehicle’s exact position. Once the positioning data along with
other event data are gathered, they will be transmitted to the service center across a Mobile network (e.g.
GPRS/CDMA/UMTS) or via SMS. The communication is bidirectional, which means you can control the AL7
remotely across a Mobile network or via SMS.
System Architecture