-9-
v7.0
Device description
2.3.4. GPS screen
This screen can be accessed by briefly pressing the pushbutton 2 after the home screen. It allows to check the
functioning information of the GPS module, as well as the device’s GPS positioning.
Item
Icon
Description
Number of
satellites
SAT xx
Indicates the number of satellites
received by the device
GPS signal
Indicator showing the quality of the GPS
signal:
•
1 bar: weak reception
•
2 bars: average reception
•
3 bars: good reception
Latitude
Display showing latitude coordinates in
degrees, minutes and seconds
Longitude
Display showing longitude coordinates
in degrees, minutes and seconds
When the GPS signal has not yet been “fixed”, no information on latitude or longitude will be displayed on the
screen and the information icon will indicate that GPS has not been synchronized yet.
2.3.5. PER (Packet Error Rate) screen
This menu can be accessed by briefly pressing the pushbutton 2 after the GPS menu. It allows to evaluate the
quality of the radio connection between the device and the network.
Figure: PER screen
The screen will display:
•
The number of frames sent (UL COUNT), including repetitions
•
The number of frames received (DL COUNT)
•
The Packet Error Rate (PER), as a percentage
The PER measurement is calculated by comparing the number of frames transmitted to the number of frames
received: PER (%) = 100 - (( DL_COUNT / UL_COUNT) * 100).