Navico MX420, Installation & Service Manual, Page: 69 / 80

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MX 420 Installation and Service Manual
Example:
$GPXTE,A,A,3.42,L,N*hh<CR><LF>
Field #: 1 2 3 4 5 6 7 8 9
Sentence terminator
Optional checksum (HEX)
In Ver. 1.5 & 2.0, required in Ver 2.1
Checksum delimiter
Units of measure, N=nautical miles
Direction to steer, L=Left, R=Right
Magnitude of error (nautical miles)
Not used, Always = A
Status: A=Data valid, V=Data invalid
Start of Sentence delimiter
Address: GP = Talker identifier: GPS
XTE= Sentence formatter: Cross-Track Error
NMEA Output Sentences
All sentences have the identifier “GP” for Global Positioning Systems. All position data
are in the user selected (displayed) datum except for GGA where the datum can be
manually set to WGS84, independent of the selected (displayed) datum.
RMB is transmitted only if an active route is present. Please refer to the Route section
of the Operator’s Manual for details on setting up an active route.
APA , APB , and XTE , are transmitted only if an active route is present and the
Autopilot Alarm in each of these NMEA sentence setup screens is Enabled and this
feature is not in an alarm condition.