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symbolizes the zenith. The closer a satellite is located to the outer circle,
the closer it is to the horizon and the more difficult it is to receive its
signal. The closer a satellite is located to the inner circle, the higher it is
relative to the horizon and the easier it is to receive its signal.
The two windows on the left display the quality of the reception from each
satellite. When the bar is completely black, or filled in 3/4 high, the
satellite reception is perfect.
Note: Depending on the time of day, the number of satellites in the sky
from a given location usually varies from 6 to 12. On average, 9
satellites are available.
The DOP (Dilution of Position) indicates the accuracy of the position
calculation. It depends on the position of the satellites with respect to one
another. The closer the DOP is to 1, the better the accuracy.
The CPE (Circle of Probable Error) indicates the radius of the circle
containing 50% of the positions calculated by your GPS. For example, if
your CPE is 2 meters, your actual position is 50% likely within a radius of
2 meters from the calculated position.
Note: Because of the position of the satellites (always above), the
accuracy of the altitude calculation is approximately half as good
as the accuracy for the horizontal calculations.
Setting the Local Time
Your FX324 MAP uses UTC time, which is automatically and constantly
updated by the satellites from which it is receiving signals. You need to
set the local time if you are in a time zone other than the UTC time zone.
Menu Æ POS Tab Æ 2-Local Time
Enter the local time with the alphanumeric keypad and push Enter.
See Setting the Local Time or a Date.
Note: The local time must be entered in 24-hour format.
Choosing the Type of Geographic Coordinates
The Coordinates option allows you to change the system of coordinates
used to display your position.
Menu Æ POS Tab Æ 3-Coordinates
The list of available coordinate systems is displayed.
00º00.000’ Latitude and longitude in thousandths of a minute
00º00.0000’ Latitude and longitude in ten thousandths of a minute
00º00’00.0’’ Latitude and longitude in seconds
00.00000GRD Position in grades
UTM Position in UTM
Lamberts Position in Lambert 1
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