Garmin eTrex Legend C Owner's Manual - Page 56

Main Menu Setup Options GARMIN Mode with No Options GARMIN Differntial GPS Mode with Data and Options Fields 46 Interface Page The Interface Settings Page allows you to choose from different input/output serial data formats. This feature is used when connecting to external NMEA devices, a DGPS beacon receiver, a personal computer, etc. Effective use of this feature requires a working knowledge of these formats: 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 In/Out - Supports the input and output of standard NMEA 0183 version 3.0 data. Text Out - Allows ASCII text output of location and velocity information without input capabilities. RTCM In - Allows DGPS input using a standard RTCM SC-104 format without output capabilities. RTCM In/NMEA Out- Allows DGPS input using a standard RTCM SC-104 format and supports the output of standard NMEA 0183 version 3.0 data. RTCM In/Text Out- 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 in/NMEA Out' format is selected, additional fields 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. To select a serial data format: 1. Highlight the Serial Data Format field and then press in on the THUMB STICK to display options. 2. Highlight an option and then press in on the THUMB STICK to activate it.