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based transmitters that send correction signals to small DGPS receivers.
DGPS gives you more accurate positions than is otherwise possible.
All wiring connections to the GlobalNav 12 are made through the power
cable. See the sample wiring diagrams on the next page for general wir-
ing procedures. Read your other product’s owner’s manual for more wir-
ing information.
Once the cables are wired, turn the unit on, press the menu key, and
select NMEA / DGPS CONFIG from the System Setup menu. A screen
similar to the one shown below appears.
NMEA Output
To turn the NMEA output on, highlight the “NMEA OUT-
PUT” menu (shown at right), then press the right arrow
key. If your other equipment works, then no setup will
need to be performed. If your other equipment doesn’t
recognize the NMEA data being sent by the Global-
Nav 12 and the wiring is correct, then you may need to
change the NMEA or the serial communication settings.
Configure NMEA Output
Highlight the “Configure NMEA Output” menu, then
press the right arrow key. The screen shown below ap-
pears.
NMEA 0183 Version
There are two versions of the NMEA data, 1.5 and 2.0.
If your other equipment requires 2.0, press the right
arrow key to select it.
GLL, RMC/RMB, APB, GGA, GSA/GSV
Sentences
Some equipment requires different sentence. The de-
fault setting for these sentences is on. In other words,
it automatically sends these sentences when NMEA is
turned on. To turn any of these off, move the black box
to the desired menu and press the left arrow key. Press the EXIT key
when everything on this screen is the way you want it.
DGPS
This unit will recognize Starlink
®
and Magnavox
®
automatic DGPS receiv-
ers. If you have either one of these receivers, simply highlight the “Star
DGPS” or “Magn DGPS” on the NMEA / DGPS menu and press the right