Garmin eTrex Owner's Manual

Also see for eTrex - Hiking GPS Receiver: Features Owner's manual Manual Quick start guide Owner's manual

45Interface formats are selected from the SETUP Page.The input/output lines on your eTrex are RS-232 compat-ible, allowing easy interface to a wide range of externaldevices, including PC’s, differential beacon receivers,marine autopilots and/or a second GPS receiver.The NMEA 0183 version 2.0 interface format issupported by the eTrex and enables the unit to drive upto three NMEA devices.NMEA 0183 Version 2.0 Approved Sentences:GPGGA, GPGLL, GPGSA, GPGSV, GPRMB, GPRMC,GPRTE, GPWPL, GPBODGARMIN Proprietary Sentences:PGRME (estimated error), PGRMM (map datum),PGRMZ (altitude), PSLIB (beacon receiver control)DGPS (Differential GPS) corrections are accepted inRTCM SC-104 version 2.0 format through the ‘Data In’line. The GARMIN GBR 21 is the recommended beaconreceiver for use with the eTrex. Other beacon receiverswith the correct RTCM format may be used, but may notcorrectly display status or allow tuning control from theGPS unit.The eTrex may be hard-wired to a serial connectorusing the Data Cable (see page 8 for ordering informa-tion). Refer to the wiring diagram and the eTrex unit dataconnection illustrated below.The optional PC Interface Cable (010-10206-00)allows you to connect your eTrex to a PC-compatiblecomputer’s serial port.eTrexConnectorDataCableGround (-)Data OutData InPower (+)GroundData OutData InWhiteGreenBlackAppendicesAppendix EWiring Diagram