Garmin G3X Installation Manual page 96

A green checkbox will appear next to the name of each Comm port when it is receiving valid data, or a
red X if data reception has been interrupted or has timed out.
G3X installations with a single GDU 37X will display the RS-232 and ARINC 429 configuration settings
on separate soft-key selectable pages.
PFD 1, MFD, and PFD 2 Comm Port Configuration options
Each connected GDU 37X has three configurable RS-232 channels, the optional settings are:
Garmin Data Transfer - The proprietary format used to exchange data with a PC.
NMEA Out - Supports the output of standard NMEA 0183 version 3.01 data at a baud rate of 4800. The
GDU outputs data from the selected GPS source (internal GPS or external GPS1/GPS2) via NMEA
sentences.
A setting that allows switching the NMEA output between "Normal" and "Fast" speeds is accessed by
pressing the MENU Key on the Comm Page (at least one output must be set to NMEA Out). This setting
affects all RS-232 ports that are configured to output NMEA data. The selected speed is displayed
following the baud rate now for all ports configured for NMEA output. This feature is useful for sending
data to devices that require the full set of NMEA sentences at a slower pace.
Fast (every second): GPRMB, GPRMC, GPBOD, PGRMH, PGRMZ
Normal (every two seconds): GPRMB, GPRMC, GPBOD, GPGGA, GPGSA, GPGSV, GPGLL,
GPBWC, GPVTG, GPXTE, GPRTE, GPWPL, GPAPB, PGRME, PGRMH, PGRMM, PGRMZ
Aviation In - The proprietary format used for input to the G3X (baud rate of 9600) from an FAA certified
Garmin panel mount unit. Allows the G3X to display a Go To or route selected on the panel mount unit,
which eliminates the need to enter the destination on both units.
Aviation In/NMEA & VHF Out - Receives aviation data and transmits out both NMEA data, at 9600
baud, and VHF frequency tuning information to a Garmin Nav/Comm radio.
MapMX - The preferred data source when interfacing with an external navigator, and is only available
from Garmin units with a WAAS GPS receiver. When MapMX data is received, the G3X display can
show more accurate information about the external navigator flight plan (e.g. DME, arcs, and holding
patterns).
TIS In - Receives TIS data from a Garmin Mode S transponder.
Page 7-16 G3X Installation Manual – Software, Configuration, Databases, and XM Activation
Revision E 190-01115-01