SX BLUE GPS iSXblue II+ GNSSTM, Руководство пользователя

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SXblue Series User Manual 40
Table 1-5 LED Indicators Definitions
LED Color Function
Red
Power – when the SXblue receiver is powered, this LED will illuminate. When battery is low, the Power
indicator will start blinking 20 minutes prior to auto shut-down.
Green
GPS Lock – once the SXblue receiver achieves a solid GPS lock and computing a valid position, this LED
will remain illuminated. If this LED continues to blink, it could be an indication of a receiver hardware
failure.
Orange
DGPS Position – this LED will illuminate when the receiver has achieved a differential position and the
pseudorange residuals are below that set with the $JLIMIT command and the computed solution is a 3D
fix. The default value is a pseudorange residual of better than 10 meters. If the residual value is worse
than the current threshold, the orange DGPS LED will blink indicating that differential mode has been
attained but that the residual has not yet met the threshold. The same happens when the PDOP exceeds
the 10.5 factory default threshold and switches to 2D mode (this is set with $JALT,sometimes,10.5).
For DGPS operation, the LED will blink to an amount of time equivalent to the $JAGE value (default is
3600 seconds) if the source of differential correction (ex. SBAS) is lost. The Coast technology will maintain
sub meter accuracy for 30-40 minutes depending on ionospheric conditions.
For RTK operation under the MFA application, it will remain solid for 1 minute after the loss of RTK signal
and blink for an extra 2 minutes indicating a float solution; after a total of 3 minutes the receiver will switch
to the next best available differential correction source (ex. SBAS if available).
Yellow
Differential Lock – this indicator will illuminate continuously when the SXblue receiver has achieved a
solid SBAS or Atlas lock (depending on model) with better than a 150 bit error rate (BER) or when it is
successfully receiving externally input 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.
Blue
Bluetooth – this LED will illuminate when there is a Bluetooth connection between the SXblue receiver
and a Bluetooth compatible device and blinking, depending when there is no Bluetooth connection.
Note: When the SXblue receiver acquires a GPS lock, the green GPS lock LED will illuminate. Similarly, the yellow
differential LED (DIFF) will illuminate when differential corrections are being received successfully. The orange DGPS LED
will illuminate when the receiver has acquired a GPS lock, differential lock, and has applied corrections within the position
solution. The following image displays the front panel layout of the SXblue receiver, including the location and labelling of
each LED. For more information on LED operation and troubleshooting, refer to Technical Reference Manual.
1.4.5 GIS Field Data Collection and Datum Considerations
For optimal performance and results of field data collection, proper configuration
of the field software and some common GPS guidelines are essential when using
the SXblue receiver. This section only lists some important points to be aware of
before going to the field but Chapter 3 - Advanced Operations, will cover the
required receiver configurations in detail.