Magellan eXplorist 100 Reference Manual

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Magellan eXplorist 100 Reference Manual Manual pdf 60 page image

Restarting the GPSRestarting the GPS provides a means of giving the eXplorist information about itsapproximate position. Long time GPS receiver users will know this option as initializing. Tounderstand when you would use this option, a brief explanation of how the eXplorist workswill be helpful.The GPS constellation consists of 24 satellites and three spares that orbit the earth. At anygiven time of the day a different collection of satellites will be overhead. To keep track ofwhich satellites are in view, the eXplorist has a built-in almanac that uses the present dateand time, along with its approximate position, to “look up” which satellites should be in view.Every time you turn your eXplorist off, it records, in a special place in its memory, the lastposition fix computed. Then when it is turned back on, it assumes that it is still in the sameapproximate location and uses this last position fix when doing its “look up” in the almanac.Now, if you turn your eXplorist off and fly across the country, the next time you turn it backon it will think it is still at the location where it was turned off and will begin looking for thesatellites that it thinks are overhead. If the satellites are not there, the eXplorist begins“polling” the skies, trying to determine which satellites are in view. This process can taketime and can appear as if the GPS portion of the eXplorist is not working. Under normalconditions, the eXplorist will still be able to compute your position, but this can take longerthan normal.Restart GPS gives you the ability to give the eXplorist its approximate location, hencespeeding up the time to acquire its first fix. Many eXplorist users will never need to use theRestart GPS option, but it is available should the need arise.When to use Restart GPS:• When the eXplorist has been moved more than 500 miles (804.67 km) while turned off.• When the eXplorist is sluggish and takes more than a few minutes to compute its firstposition fix when turned on. (This really isn’t an option that you need to be concernedabout. Thanks to a built-in feature, the eXplorist, when it has trouble computing itsfirst position fix, automatically asks you to supply your approximate position.)Restarting the GPS:1. Press MENU.2. Use the Arrow joystick to highlight Preferences.3. Press ENTER.4. Use the Arrow joystick to highlight Restart GPS.5. Press ENTER.Preferences 55PreferencesRestart GPSMap UnitsPwr ManagementPersonalizeLanguageClear Memory