CSI Wireless GBX, Reference Manual

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GBX Reference Manual
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You may select Bx-E mode from the
Options
section of the
Setup
menu, as described in Section 3.9.1. Refer to Appendix B to connect
an external GPS receiver for Bx-E operations. Please consult Chapter
4, or your GPS receiver user’s guide for more information on these
GPS NMEA messages.
3.3 Receiver Lock Indication
The following sections describe the lock indicators of the GBX receiver.
The lock indicators present depend on the current operating mode of
the GBX.
3.3.1 Position Fix Status
The GBX provides an indication of the GPS lock status, as contained
within the $GPGGA message string output from the data port of the
receiver. This indicator is located in the lower right hand corner of the
GBX display. Figure 3-2, describes the three states of GPS lock.
No Fix GPS DGPS
Figure 3-2 GBX GPS Position Fix Indicator
In the first state, the two parallel vertical lines indicate that no position fix
is available. The second state, denoted by the hollow circle between
the two parallel vertical lines states that the receiver is tracking four
satellites or more, and is computing a position. This indicator is a
symbol representing a GPS satellite. The third state, denoted by the