Garmin eTrex Legend - Manual (Page 54)

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Reference
Setup Pages Interface Page - Overview
The Interface Settings Page allows you to choose from
seven different input/output serial data formats, or, none
at all. This feature is used when connecting your eTrex
Legend to external NMEA devices, a DGPS beacon receiver,
a personal computer, etc. For effective use of this feature it
is necessary to have a working knowledge of these applica-
tions. Following is a description of each format:
GARMIN - The proprietary format used to exchange
waypoint, track, and map data with a PC.
GARMIN DGPS - Allows DGPS input using a
GARMIN beacon receiver and a standard RTCM
SC-104 and DGPS tuning.
NMEA Out - Supports the output of standard NMEA
0183 version 2.3 data.
Text Out - Allows simple ASCII text output of location
and velocity information, without any input capabilities.
RCTM In - Allows DGPS input using a standard
RCTM SC-104 format without any output capabilities.
RCTM In/NMEA Out- Allows DGPS input using a
standard RCTM SC-104 format and supports the
output of standard NMEA 0183 version 2.3 data.
RCTM In/Text Out- Allows DGPS input using a
standard RCTM SC-104 format and simple ASCII text
output of location and velocity information.
None - Provides no interfacing capabilities.
If ‘GARMIN DGPS’ or ‘RCTM in/NMEA Out’ format
is selected, additional fi elds are provided to control a
GARMIN differential beacon receiver (e.g. GBR 21 & GBR
23) directly from your unit. Tuning is automatic with
‘Scan’ or you can enter the beacon frequency and bit rate
when you select ‘User’ from the Beacon list to manually
tune the receiver. Refer to the beacon receiver instructions.
Step-by-Step Instructions
To select a serial data format:
1. Highlight the Serial Data Format fi eld and then press
in on the CLICK STICK to display options.
2. Highlight the desired option and then press in on the
CLICK STICK to activate it.
3. If you selected a format that displays additional fi elds,
highlight those with options and make your selection
using the CLICK STICK.
GARMIN Mode
with No Options
GARMIN Differntial GPS
Mode
with Data and Options
Fields