Delorme pn-20 사용자 가이드

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Once you turn on the Earthmate GPS PN-20, the Satellites Page displays. The Satellites Page informs 

you of your current GPS status, the number of satellites the Earthmate GPS PN-20 is acquiring data 

from, the signal strength, and the GPS accuracy (available only when a 2-D or 3-D fix is obtained).
GPS and WAAS Status
GPS status displays in the upper-left corner of the page and displays the following, depending on 

your satellite acquisition status:

•  GPS Off—The GPS is disabled.
•  No Fix—The GPS cannot find sufficient satellite data to determine your current GPS position.
•  2-D—The GPS connection is successful, but the connection quality is not quite as sufficient 

as a 3-D fix. This usually indicates insufficient data for an accurate location because only three 

satellites are being used or signals from the satellites are poor. Move your receiver to another 

location until you get better reception.

•  3-D—The GPS receiver is receiving sufficient satellite data to determine your location.

If  WAAS displays in the upper-right corner of the page, the Earthmate GPS PN-20 has obtained a 

WAAS connection. WAAS provides up to five times greater position accuracy than a regular 2-D or 

3-D connection. WAAS is available only in North America.
Satellite Constellation and Signal Graph
Both the satellite constellation and the satellite signal graph display visible satellites and their identi-

fying numbers, which are assigned by the Department of Defense.
In the satellite constellation, satellite-shaped icons display each satellite’s position in the sky relative 

to the device’s current position.
In the satellite signal graph, each satellite is represented as a bar that is sized according to signal 

strength. Longer bars have greater strength and shorter bars have less strength.
The icons in the satellite constellation and the lines in the signal graph are color coded based on the 

quality of the data they are transmitting: