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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 PC’s, differential beacon receivers, marine autopilots and/or a second GPS receiver.
The NMEA 0183 version 3.0 interface format is supported by the eTrex and enables the unit to drive up to three NMEA devices.
NMEA 0183 Version 3.0 Approved Sentences:
GPGGA, GPGLL, GPGSA, GPGSV, GPRMB, GPRMC, GPRTE, GPWPL, GPBOD, HCHDG
Garmin Proprietary Sentences:
PGRME (estimated error), PGRMM (map datum), PGRMZ (altitude), PSLIB (beacon receiver control)
DGPS (Differential GPS) corrections are accepted in RTCM SC-104 version 2.0 format through the ‘Data In’ line. The Garmin GBR 21 is the
recommended beacon receiver for use with the eTrex. Other beacon receivers with the correct RTCM format may be used, but may not cor
-
rectly display status or allow tuning control from the GPS unit.
The eTrex may be hard-wired to a serial connector using the Data Cable (see your Garmin dealer or visit
www.garmin.com
for availablity).
Refer to the wiring diagram and the eTrex unit data connection illustrated above.
Appendix F
Wiring Diagram
eTrex Connector
Data
Cable
Ground (-)
Data Out
Data In
Power (+)
Data Out
Data In
White
Green
Black
Ground
The optional PC Interface Cable (010-10206-00)
Indexing Slot
(align with
slot on unit)