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Caddy Lite User Guide - Version 1.0 2007
Warning
The Global Positioning System (GPS) is operated by the United States
Government, which is solely responsible for its accuracy and
maintenance. The system is subject to regional and global changes over
which Golf Plus Ltd has no influence. Such regional and global changes
to the satellite system implemented by the US Government could
temporarily or permanently affect the accuracy and performance of all
GPS receiving equipment.
Golf Plus cannot and expressly does not guarantee the continuing
availability or accuracy of the satellite system operated by the US
Government. Although the Golf Plus GPS receiver is a precision
electronic satellite receiver any receiver can be misused or misinterpreted
and, therefore, become unreliable.
What is GPS?
The Global Positioning System (GPS) is a system of 24 satellites that
circle the earth in a precise orbit and transmit information to satellite
receivers. The Caddy Lite is a satellite receiver and must continuously
‘see’ at least four of these satellites to calculate your location and
provide distance measuring information on a golf course.
If some of the satellites in view get blocked or ‘shaded’, the receiver
can simply use an alternate satellite to maintain the location fix.
Because the Caddy Lite relies on satellite signals to provide you with
distance information, the receiver must have an unobstructed, clear
view of the sky for best performance. The GPS receiver’s view of the
sky generally determines how fast you get a location fix, or if you
get a fix at all. GPS signals do not travel through rocks, buildings,
people or metal, so remember to keep a clear view of the sky at all
times for best performance.
Your Caddy Lite needs to be given the opportunity to find satellites and
auto-locate itself (‘initialisation’).
Once you initialise the unit to a location it typically computes a view of
the available satellites within a couple of minutes. This process is
referred to as ‘downloading the Ephemeris’. The simple ability to see
satellites does not, in itself, provide enough information for the Caddy
Lite to satisfy the demands of the application for which it was designed.
In addition to the Ephemeris your Caddy Lite needs to download ‘The
Almanac’ when it is first switched on in a new area.
The Almanac consists of 25 pages of A4 information transmitted at the
rate of 50 kilobits per second. This process can take up to 12.5 minutes
to complete. Your Caddy Lite must download the Almanac completely
for it to work effectively in the application for which it was designed.
Once the Almanac has been received the word SATS will appear on the
display of your Caddy Lite. Until this state has been achieved your Caddy
Lite will not perform to the best of its capabilities.
Subject to your Caddy Lite having not moved more than 1000
kilometres, the effective Almanac will be stored and reused for a period
of up to 3 hours after it has been switched off.
Should the Caddy Lite be switched off and switched back on, within 3
hours you will not have to wait for the Almanac to be downloaded and
it will operate to its optimum capabilities as soon as the Ephemeris has
been received (up to 2 minutes), subject to the Caddy Lite having not
been moved more than 1000 kilometres. For a graphical presentation of
the ‘Lock On’ and ‘Warm Up’ period see the section ‘Power On’ on page
8 of this User Guide.