5
Operation
LED Status Indicators
Status Indicator State Status
Power
Solid green The Field Hub is powered on.
Note: The Field Hub goes through a power down
sequence when the ignition is switched off. It is
normal for the Power LED to remain on for
approximately 60 seconds after the ignition switch
is turned off.
Solid green with
yellow flashing
every four seconds
The Field Hub has a fixed GPS signal.
Solid yellow The Field Hub ignition power is off and the Field
Hub will shut down soon.
Solid red The Field Hub is not operational.
ACT/232 -
Displays the
activity over the
WAN connection
and serial port.
Flashing yellow Data is being transmitted or received over the
serial port and WAN interface at the same time.
Flashing red Data is being transmitted or received over the
serial port.
Flashing green Data is being transmitted or received over the
WAN interface.
Flashing yellow or
red/green
Data is being transmitted or received over the
serial port and the WAN interface simultaneously.
Signal - Displays
the current
cellular signal
strength.
Solid green The cellular signal is strong. RSSI>-85dBm
Solid yellow The cellular signal is marginal. (-100 dBm < RSSI
< -85 dBm)
Solid red The cellular signal is poor. (-110 dBm < RSSI < -
100 dBm)
Flashing red No cellular signal is available. (RSSI < -110 dBm)
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