CALAMP WIRELESS NETWORKS INC. 1409123000 Manuel D’Utilisation
CONFIGURATION
001-9193-001 Version 2
Page 42 of 52
Sentry 4G
TM
User
Manual
5.8 GPS Status and Settings
The Sentry 4G unit incorporates a highly sensitive 16-channel GPS receiver and an intelligent
algorithm that offers outstanding receive sensitivity. Summarized below are the specifications of the
integrated GPS module:
algorithm that offers outstanding receive sensitivity. Summarized below are the specifications of the
integrated GPS module:
Typical sensitivity
-135 dBm
Reacquisition time
Less than 2 seconds
Average Cold/Warm/Hot Start time to first fix
Under 45/15/3.5 seconds
Position Accuracy
GPS Standard Positioning Service (SPS)
<15 meters
DGPS (WAAS) corrected
<3 meters
The GPS page allows the user to see the GPS status and configure remote or local delivery of GPS
position reports. Viewing the GPS data from a local or remote PC requires a UDP port listener
program be installed on the PC. Any UDP listener will work provided you can set an appropriate port
value for the program.
position reports. Viewing the GPS data from a local or remote PC requires a UDP port listener
program be installed on the PC. Any UDP listener will work provided you can set an appropriate port
value for the program.
5.8.1
GPS Status
Figure 25 - GPS Status
Condition: Indicates No Fix, Standard GPS Fix, Differential GPS Fix, or Estimated / Last
Known Position
Number of Satellites: Indicates the number of satellites the GPS has locked on to. A
minimum of 3 is required to establish a position. Generally, the more satellites the GPS has
minimum of 3 is required to establish a position. Generally, the more satellites the GPS has
locked, the more accurate the position reporting will be.
UTC: Time of day in Universal Coordinated Time
Position: Device position reported in degrees and minutes
Altitude: Altitude from Mean Sea Level reported in meters.
True Course: Heading, reported in degrees (0 – 360)
Ground Speed: Reported in km/hr