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Reference
Main Menu: GPS Tab
The status fi eld will show one of the following conditions:
Looking For Satellites – the receiver is looking for any satellites.
AutoLocate – the receiver is looking for any satellite whose almanac has been collected. This
process can take up to fi ve minutes.
Acquiring Satellites – the receiver is looking for and collecting data from satellites visible at its last
known or initialized position, but has not collected enough data to calculate a fi x.
2D – at least three satellites with good geometry have been acquired and a 2 dimensional position
x (latitude and longitude) is being calculated. ‘2D Differential’ appears when you are receiving
DGPS corrections in 2D mode and a ‘D’ will show on the strength bar of satellites being corrected.
3D – at least four satellites with good geometry have been acquired and your position is now being
calculated in latitude, longitude and elevation. ‘3D Differential’ appears when you are receiving
DGPS corrections in 3D mode and a ‘D’ will show on the strength bar of satellites being corrected.
Poor GPS Coverage – the receiver is no longer tracking enough satellites for a 2D or 3D fi x.
Receiver Not Usable – the receiver is unusable, possibly due to interference or abnormal satellite
conditions. Turn the unit off and back on to reset.
Simulating – the receiver is in simulator mode.
The Differential Receiver status will show one of the following:
Off – No optional beacon receiver attached or enabled in the Comm menu or WAAS Off
Searching For WAAS – WAAS is enabled and receiver is searching for WAAS signal
Using WAAS – WAAS capability enabled and unit receiving WAAS corrections
No Beacon Signal – DGPS receiver attached, but not transmitting RTCM data to GPS
Tuning Beacon – Receiver is tuning manual DGPS frequency
Receiving Beacon – Unit is receiving DGPS corrections
Scanning Beacon – DGPS receiver is scanning for available frequency
Using DGPS – Indicates a Differential signal is being received (only displays when the Serial Data
Format is set to “Other DGPS” on the Comm Tab of the Main Menu)
When the GPSMAP 188/188C/238 Sounder is
using a differential correction signal (either WAAS
or DGPS), a “D” is displayed at the bottom of the
signal strength indicator bars for the satellites that
are corrected.
188188C238 Manual Part 2.indd 70 6/30/2003, 3:32:21 PM
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