User's Manual

CSI-Wireless AssetLink 200 Installation and Operating Instructions
Revision 1.0 Page 4 1/2/2002
1 Introduction
1.1 Operational Overview
The AssetLink 200 vehicle unit provides a specific set of features for vehicle
security and vehicle tracking through the integration of Cellular Control Channel
data communications, Cellular Voice Channel data communications, Global
Positioning System (GPS) technology, and an intelligent power management.
System Features
The AssetLink 200 unit incorporates the following major features:
• Integrated Microburst radio,
• Integrated Cellular Audio Modem
• GPS receiver
• Power management modules.
• Real Time Clock for scheduling and power management.
• Low power mode.
• Event schedules & triggers
• Protected automotive power supply.
1.2 Operating Modes
The AssetLink 200 unit offers three operating modes.
• Power Off Mode
• Armed Mode
• Active Mode
2 AssetLink 200 Internal Components
2.1 Twelve Channel GPS Receiver.
The AssetLink 200 unit incorporates an integrated twelve-channel GPS receiver.
2.1.1 GPS Position/Velocity Fix.
The GPS receiver establishes a position fix as shown in Table 1.
Time for Fix
Certainty Conditions
<< 1min.
90% GPS receiver powered on 6 –24 hrs. without a current
almanac, satellite ephemeris, initial position or
time.
<< 30 sec.
90% “Warm Start”, GPS receiver powered on 1 – 6 hrs. with
a current almanac, satellite ephemeris, initial
position and time.
<< 10 sec.
90% “Hot Start”, GPS receiver powered off for less than 60
minutes with a valid almanac, satellite
ephemeris, position and time.
Table 1 - Establishment of Position Fix
The GPS almanac is updated continuously as pages of the almanac are received
during Active Mode state. During the Active Mode the GPS receiver is always
powered on and attempting position fixes.