Interface Formats; Connecting Your Etrex To A Computer - Garmin eTrex H Owner's Manual

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Interface Formats

Interface formats are selected from the Setup page.
The input/output lines on your eTrex are RS-232
compatible, allowing easy interface to a wide range
of external devices, including computers, differential
beacon receivers, marine autopilots and/or a second
GPS receiver.
The NMEA 0183 version 3.0 interface format is
supported and the unit can drive up to three devices.
NMEA 0183 Version 3.0 Approved
Sentences:
GPGGA, GPGLL, GPGSA, GPGSV, GPRMB,
GPRMC, GPBOd, GPRTE.
Garmin Proprietary Sentences:
PGRME (estimated error) and PGRMZ (altitude).
dGPS (differential GPS) corrections are accepted in
RTCM SC-104 version 2.0 format through the data In
line. Beacon receivers with the correct RTCM format
may be used, but may not correctly display status or
allow tuning control from the GPS unit.

Connecting Your eTrex to a
Computer
You can connect your eTrex to your computer using
the computer connector cable.
To connect your eTrex to your computer:
1. Lift the communication port protective cover
from the back of the eTrex, and insert the
smaller connector on cable into the matching
port.
2. Connect the remaining cable end to your
computer's serial port.
eTrex H Owner's Manual