Garmin echoMAP 40 Series, Руководство пользователя и справочник

Страница: 9 / 68

Getting Started with your GPS
Welcome to the exciting world of GARMINGPS! The
GPS 40 represents GARMIN’s continuing commitment to
provide outdoor enthusiasts with quality navigation infor-
mation in a versatile, user-friendly design they will enjoy
for years to come. To get the most out of your GPS 40, be
sure to read through the initialization and Getting-Started
sections of this manual, and refer to the reference section
for complete details on the GPS 40’s advanced features.
Initializing Your GPS for First-Time Use
The GPS 40 calculates your position and movement by
tracking signals sent from GPS satellites. Each of the 24
GPS satellites circle the earth twice a day in a very precise
orbit, and transmit information back to earth. In order to
determine a position fix, your GPS receiver needs to contin-
uously “see” at least three satellites.
Because a GPS receiver can only see satellites above the
horizon, it needs to know what satellites to look for at any
given time. By using an almanac (a timetable of satellite
numbers and their orbits) stored in the receiver’s memory,
the GPS 40 can determine the distance and position of any
GPS satellite.
To use this almanac data, your GPS receiver needs to
know where you are, or be given the opportunity to “find
itself”. Once you initialize the unit to this position, the GPS
40 will usually compute a fix within a few minutes.
Remember, this process is only necessary under the
following conditions:
• First-time use from the factory.
• The receiver has been moved over 500 miles from
the last calculated position with power off.
• The receiver’s memory has been cleared and all
stored data has been lost.
Getting Started
Initialization
&
Wrist Strap
5
Wrist Strap
To attach the GPS 40’s wrist
strap, thread the strap
through the D-ring on the
battery compartment cover.
Take the solid end of the
strap and thread it through
the slot at the other end of
the strap and tighten.
GPS 40 XL 8/5/98 8:15 AM Page 5