Arrow Series Technical Reference Manual
7
LED Description
Power – This red LED illuminates to indicate a power-on status of the Arrow. When
battery voltage reaches a low threshold, the Power indicator will start blinking about 15-20
minutes (depending on the model) before auto shut-down.
GPS – The GPS green LED will turn on once the Arrow is computing a valid position/fix. A
blinking state would indicate a receiver malfunction.
DGPS – A solid state of this orange LED indicates that the Arrow is in DGNSS (differential
correction) mode. The conditions are that it has successfully applied differential correction
to its position (see DIFF LED below) and the pseudorange residuals are below the
threshold set by the $JLIMIT command (default is 10.0) and the position is in 3D.
A blinking state can be caused by any of the following:
- differential correction is no longer being received by the Arrow (DIFF LED will be off). In
this case the LED will blink till the value set by the $JAGE command is reached (default is
3600 seconds). If using SBAS, the receiver will stay in DGNSS mode. If using RTK
corrections, it will be an indication that the Arrow is not in a fixed ambiguity mode but is in
a Float condition.
- the receiver is in 2D mode
- the pseudorange residual set by the $JLIMIT command has been exceeded
- the PDOP threshold value set by the $JALT,SOMETIMES,pdop has been exceeded
An off state means the Arrow’s position is not being differentially corrected.
Note that the Arrow’s data output flow is not altered by these LED states.
DIFF – This yellow indicator will illuminate continuously when the Arrow has achieved a
solid SBAS or LBand (Atlas or OmniSTAR) lock (depending on model) with better than a
150 bit error rate (BER) or when it is successfully receiving RTCM/RTK corrections. For
example, if the SBAS BER is higher than 150 but the receiver is still locked, this LED will
blink, showing that lock is marginal.
Bluetooth – This blue LED will illuminate when there is a Bluetooth connection between
the Arrow and a Bluetooth compatible device. It will be in a blinking state when there is no
Bluetooth connection. It will be off if the Bluetooth miniature DIP switch, between the main
battery contacts, is in the OFF position (in this case use the tip of a pen or sharp
screwdriver to slide the switch to its ON position).
To Next Page
Loading...
General