SXBlue II GPS Series Technical Reference Manual
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Table 7-2 LED Functions
Power LED: (
Red
)
This LED should be on (solid) once power is applied to the
receiver. This is the only LED that is not under GPS
computer control.
Once the battery voltage reaches a certain threshold, this
LED will start blinking (roughly 15-20 minutes prior to auto
shutdown).
GPS LED: (
Green
)
This LED serves two purposes:
At power-on if it starts blinking, the GPS processor is likely
faulty.
After a minute or so, this LED should go on solid green to
indicate that GPS has locked. This is true even if
differential corrections are not available. If the LED is
continually blinking and you have been programming your
SXBlue II GPS, it is possible it is still in programming
mode. The SXBlue II GPS will not communicate while in
this state. Simply power cycle the SXBlue II GPS to
restore normal communications.
DGPS LED: (
Orange
)
This LED will remain off until a differentially corrected GPS
solution is available. It will blink at a steady rate if the
solution has not converged to the accuracy specified by
the $JLIMIT command and will become solid yellow after
the solution has converged. (The $JLIMIT sets the
threshold for the RMS residual error and this error gives a
rough indication of expected user accuracy. Note,
however, that it is not a direct measure of accuracy.
Factors such as constellation geometry must also be taken
into account. The default value for $JLIMIT is 10 meters).
It will also blink if the solution is a 2D solution (see the
$JALT command).
Differential Source LED: (
Yellow
)
This LED can be in several states:
Off – Differential signal has not been received.
Flickering on and off – the receiver is close to acquiring the
differential signal.
Blinking at a steady rate - Differential signal has been
acquired, but the Bit-Error-Rate (BER) of the “best” signal
tracked is higher than 150.
Generally, this will not affect performance, but it is a
warning of weak signal strength.
On Solid – WAAS, Omnistar, Radio Beacon or external
differential correction has been acquired and signal
strength is good.
Bluetooth LED: (
Blue
)
This LED will remain off until a Bluetooth connection is
established between the SXBlue II GPS and the other
device. It will remain on until the connection is broken.
