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Oxford Technical Solutions
Red The GNSS receiver has locked-on to satellites and has adjusted its clock to
valid time (the 1PPS output will now be valid). The strapdown navigator is
ready to initialise. If the vehicle is travelling faster than the value set for
“Initialisation speed” during configuration, then the strapdown navigator
will initialise and the system will become active. On dual antenna systems
the system will initialise once the GNSS receiver has determined heading,
even if the vehicle is stationary or moving slowly.
Orange The strapdown navigator has initialised and data is being output, but the
system is not real-time yet. It takes 10 s for the system to become real-time
after start up.
Green The strapdown navigator is running and the system is real-time.
In current versions of the software the strapdown navigator will not leave green and return to any other
state. This may change in future releases.
Table 16. Pos/Head (single antenna systems) or Position LED states
Colour Description
Off The GNSS receiver is not sending data.
Red flash
(Start-up only). The GNSS receiver is sending data to the RT. This is an
operational check for the GNSS receiver.
Red The GNSS receiver has a standard position solution (SPS).
Orange
The GNSS receiver has a differential solution (DGPS) or a kinematic floating
position solution (20 cm accuracy).
Green The GNSS receiver has a kinematic integer position solution (1 cm accuracy).
Table 17. Pos/Head (dual antenna systems) or Heading LED states
Colour Description
Off GNSS receiver fault (valid only after start-up).
Red flash GNSS receiver is active, but has been unable to determine heading.
Red The GNSS has a differential heading lock.
Orange The GNSS receiver has a floating (poor) calibrated heading lock.
Green The GNSS receiver has an integer (good) calibrated heading lock.
Table 18. GPS LED states
Colour Description
Green flash The GNSS receiver is functioning normally.
Other The GNSS receiver has failed. Contact OxTS for further information.
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