MBX-4 User Guide
39
MBX-4 Display Modes
The MBX-4 operates in one of two modes as described in the following
sections.
BX Mode
This is the default mode of receiver operation. In MBX-4 mode, you
have display and keypad access to all information related to beacon
receiver operation and configuration. The receiver outputs RTCM data
through the transmit data line of the serial port, and receives
configuration commands and status queries through the data port
receive pin.
BX-E Mode
In BX-E, or external GPS input mode, standard NMEA 0183 GPS
messages ($GPGGA, $GPVTG, $GPZDA, and $GPGSV) are input from
an external GPS receiver, and the position, navigation, and satellite
information contained within these messages is displayed by the
MBX-4. The MBX-4 continues to output RTCM data to the external GPS
device while in this mode. This feature can be very useful when working
with a GPS receiver that does not provide a graphical interface.
You may select BX mode from the Options section of the Setup menu,
as described in this chapter. Refer to Chapter 2 to connect an external
GPS receiver for BX-E operations. Please consult your GPS receiver
user’s guide for more information on these GPS NMEA messages.
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