47
Introduction
47
Reference
Setup Menu — ‘ Interface’ Tab
The Interface Tab contains one fi eld, ‘Serial Data Format’. This fi eld contains eight set-
tings that allow the GPS 72 to communicate with computer software and other electronic
devices.
•
GARMIN —
Allows the GPS 72 to communicate with GARMIN software and other
GARMIN GPS units.
•
GARMIN DGPS —
Allows the GPS 72 to communicate with GARMIN Differential Cor-
rection devices. The unit can have the beacon receiver scan for an available DGPS
beacon or can tune the beacon receiver to the frequency and bit rate of a nearby
DGPS beacon.
•
NMEA —
Causes the unit to transmit NMEA 0183, version 2.3 data. It also allows
the GPS 72 to accept NMEA data from another NMEA device, like a echo sounder.
The baud (speed of communication in bits per second) is displayed in the Baud fi eld.
•
Text Out —
Allows the GPS 72 to output simple text data that includes, date, time,
position, and velocity information. The Baud can be set to 1200, 2400, 4800, or
9600 bps.
•
RTCM In —
Allows the GPS 72 to accept DGPS information from a device supplying
RTCM data in a SC-104 format. The Baud can be set to 1200, 2400, 4800, or 9600
bps.
•
RTCM In/NMEA Out —
Functions the same as the ‘GARMIN DGPS’ setting except,
the unit will output NMEA 0183, version 2.3 sentences, GPRMC, GPGGA, GPGSA,
GPGSV, GPGLL, GPBOD, GPRTE, and GPWPL.
•
RTCM In/Text Out —
The same as the ‘RTCM In’ setting except, the unit will output
simple text data that includes date, time, position, and velocity information. The
Baud can be set to 1200, 2400, 4800, or 9600 bps.
•
None —
Turns off all serial communication.
When any NMEA output
is selected, the NMEA data
transmission can be customized
to keep the update rate at two
seconds. With an NMEA output
selected, press MENU and select
‘Setup NMEA Output’ to show
the setup window. You can set the
precision of the location, control
how waypoints are identifed, and enable/disable selected
NMEA sentences. To change a setting, highlight the fi eld
and press
ENTER
. Make your selection, press ENTER
again to accept the selection. To check/uncheck a box,
highlight the box and press ENTER.
NMEA Sentence Output (NMEA 2.3 compliant)
Always transmitted: GPRMC, GPGGA, GPGL, GPBWC, GPVTG,
GPXTE, GPRMB
Switchable: GPGSA, GPGSV, GPWPL, GPRTE
Garmin proprietary: PGRME, PGRMZ, PGRMM
Main Menu
Setup Menu — Interface Tab
190-00294-00_0B.indd 47
9/25/2002, 2:37:31 PM
