Garmin eTrex Vista Owner's Manual - Page 63
To adjust System options - updates
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Main Menu System Page The System Setup Page allows you to change: GPS - Choose one of the four GPS options other than 'Normal' to significantly save battery power. The 'Battery Saver' mode reduces the rate of satellite signal position updating and the 'Use With GPS Off' option stops satellite signal reception altogether. The 'Demo Mode' simulates navigation. WAAS - Switch between 'Enabled' and 'Disabled'. See page 5 for an explanation of WAAS capabilities. Language - Change the display to any of 14 choices. Compass - Turns the Electronic Compass on or off. Altimeter - Turns the Automatic Calibration for the Altimeter on or off. Selecting 'Auto Calibration On' for the Altimeter allows the unit to provide a fairly accurate reading within minutes of obtaining a 3D fix without requiring you to remain stationary. The accuracy improves over time as the barometric pressure is compared to GPS information. Also shown on this page is the Amount of Memory Used, Power Status, Time, Date, and Backlighting Status. The 'Memory Used' figure refers to the non-volatile memory within your unit and cannot be adjusted directly. Saving a number of track logs and waypoints may affect the percentage but normally will not cause any problems. The 'Power Status' icon changes from a "battery" to an "electric plug" when external power is connected. The 'Backlight' icon changes from a dark outline to a "bright" outline when you press and release the POWER button. The Option Menu allows you restore defaults or display the current version of unit operating software and the Unit I.D. Number. To adjust System Page options: Use the THUMB STICK to highlight the field and then press in to display options. Then use the THUMB STICK to select. Setup Options System Setup Page in Normal Mode, WAAS Enabled, Compass Off and Altimeter Calibration on Automatic. System Page Options Menu 53