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Reference
41
The ‘Poor Satellite Reception’ menu gives you
several options when an insuffi cient number of
satellites is received to determine a position fi x.
The sun and moon icons on the satellite skyview are for
reference (notice that the icons are grayed if the sun/
moon is below the horizon). You can see the sunrise
and sunset times for your current location and date on
the Time Setup page under System Setup.
Not Usable – The receiver is unusable, possibly due to incorrect initialization or abnormal satellite condi-
tions. Turn the unit off and back on to reset and re-initialize the receiver if necessary.
GPS is Off – The unit is being used indoors and cannot be used for navigation. When the unit is being
used indoors, battery life is saved since the GPS receiver is turned off.
Dead Reckoning (2650 only) – The unit isn’t tracking enough satellites for a 2D or 3D fi x due to bad sat-
ellite geometry or due to a shaded antenna (driving between buildings, etc.) and is using Dead Reckoning.
‘Poor Satellite Reception’ Menu
If no satellites are received for several minutes (or an insuffi cient number of satellites are received to
determine a position fi x), a message appears, prompting you to either turn off the GPS for using the unit
indoors for practice, update your approximate location (quicker) or have the unit automatically search for
the satellites (takes longer). Updating your approximate location ensures that the StreetPilot 2610/2650 is
searching for the correct satellites and is useful if you have traveled over 500 miles with the unit turned off.
If the unit has been stored for a few months and the displayed date is incorrect, the StreetPilot 2610/2650
does not know the current positions of the GPS satellites.
The ‘Poor Satellite Reception’ prompt may appear when you fi rst use your StreetPilot 2610/2650. The
prompt may also appear during normal use if the antenna is shaded or when the unit is used indoors.
Accuracy
The GPS Information page indicates the accuracy of the position fi x. See Appendix I (pages 56-57) for
the StreetPilot 2610/2650 performance specifi cations which include accuracy.
GPS Info Page
2610_2650 OM.indd 41 8/1/2003, 4:16:06 PM