Cold vs. Warm Start. When the eXplorist is turned on, one of the first things it does is
to find out which satellites are overhead, along with their relative position. It does this
by using a built-in satellite almanac. This almanac, when given the current date, time
and approximate position, can provide the eXplorist with information on which satellites
are overhead and their approximate relationship to the eXplorist. Now with information
on satellite availability, the eXplorist can begin setting its internal satellite channels to
receive satellite transmissions.
Cold Start. Cold start is defined as when the eXplorist does not have an
approximate position to use when referring to its almanac. This can occur when:
• The eXplorist is turned on for the first time after purchase. The memory is
cleared prior to shipping so that any position that may have been in the
eXplorist is set to a null value.
• If you have cleared the eXplorist's memory (found in Preferences) all of
the memory will be cleared and the last computed position will be set to a
null value.
• If you have traveled with your eXplorist with it turned off, the last position
saved may be so far away that when the eXplorist begins looking for
satellites, the ones it is expecting to find are not there. (As a rule of
thumb, any time you move for more than 500 mi [804.7 km] with the
eXplorist turned off, there is a good chance that it will start up using a
cold start.
A cold start should take no more than 2-3 minutes to compute the initial position
fix.
Warm Start. Warm starts are when the last position calculated before the
eXplorist was turned off is still in memory and you are in the same approximate
position. Most of the time that the eXplorist is turned on, it will be in its warm-
start mode. With a clear view of the sky, the eXplorist should compute its
position in a matter of seconds.
Conclusion
This concludes the initial startup procedure for the Magellan eXplorist 300. Once the
Map
screen is displayed, you have successfully initialized the eXplorist and are ready to go.
Now would be a good time to familiarize yourself with the different navigation screens
(using the NAV button) and to set any preferences that may be different from the factory
defaults.
Starting Up
13
