2.6. CHECKING GPS QUALITY
•
Show LED indicators state while in auto-LEDs-off state.
And depending on a
Manual
Configuration it could also be used to
[Advanced]:
•
Generate a voice call to a pre-set number.
•
Change the reporting frequency when pressing the button twice.
•
Create a circular region centered at the actual position.
And anything that can be programmed on the
Event Machine
set on
a
Manual
Configuration.
2.6
Checking GPS quality
The GPS LED indicator is used as GPS quality check:
•
LED OFF: Less than 3 satellites in view. This means that the
GPS data is not recent. A report generated in this moment
will not have the current GPS information. The report will be
marked as having old GPS data. If this situation persist for
more than 10 minutes and this is not the first time the unit
is powered on, or the unit’s battery has not died,
e-track
TM
sky-view access must be improved. GPS signals are easily at-
tenuated by enclosing metallic materials ant the human body.
•
LED Blinking: 3 or more satellites in view (doing position fixes),
but PDOP is to high.
This means that although there are
enough satellites to deduce a position, their actual condition
and current downloaded data is not suited enough to generate
an accurate position. The GPS data is updated anyway but
the resulting report may have inaccurate data. This is usually
a temporal condition that occurs more frequently after pow-
ering the unit for the first time, or when recovering from a
dead-battery situation. If this is not the case and you see that
the PDOP-to-high condition is reached very often, consider im-
proving the sky-view access to the unit.
•
LEN ON: This indicates a perfect GPS condition: Doing fixes
and having accurate and recent GPS data.
2.7
Checking Network Status
GSM/GPRS network can be monitored with the Network (Green)
LED. When solid indicates that the unit is registered on both GSM
and GPRS networks and that the communication has been estab-
lished with the configured Tracking Servers. When the LED is solid
but turns off very shortly every seconds it indicates that GSM/GPRS
network is ok but there is no communication with the Tracking Servers
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