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• TEXT OUT - allows simple ASCII text output of location and velocity information, without
any input capabilities.
• RTCM IN - allows DGPS input using a standard RTCM SC-104 format without any output
capabilities.
• RTCM/NMEA- allows DGPS input using a standard RTCM SC-104 format and supports
the output of standard NMEA 0183 version 3.0 data.
• RTCM/TEXT- allows DGPS input using a standard RTCM SC-104 format and simple ASCII
text output of location and velocity information.
• NONE - Provides no interfacing capabilities.
If ‘GARMIN DGPS’ or ‘RTCM/NMEA’ format is selected, additional fields are provided to
control a Garmin differential beacon receiver (e.g. GBR 21) directly from your eTrex. You can
enter the beacon frequency and bit rate when you select ‘User’ from the Beacon pop-up list to
manually tune the receiver (you can also ‘scan’ if you don’t know what the nearby station is,
but the unit could continue scanning if reception is temporarily lost).
To select an I/O Format:
1. Press the PAGE button to switch to the MENU Page. Press the UP and DOWN button and
highlight the ‘SETUP’ field. Press ENTER. The SETUP Page appears.
2. Press the
UP or DOWN button to select the ‘INTERFACE’ field. Press ENTER. The INTER-
FACE Page appears.
3. Press
ENTER on the ‘I/O FORMAT’ field. Press the UP or DOWN button to select the
desired format. Press
ENTER. Press PAGE to return to the page of your choice.
The interface options will allow you to use a PC to
download waypoints, routes, and Track Logs.
NMEA stands for “National Marine Electronics
Association” and RTCM stands for “Radio Techni
-
cal Commission for Maritime Services.” Both are
involved in developing technical standards for the
marine electronics industry.
Setup Page
Interface Page