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GPS
If the navigation appears to be unstable or erratic, check the satellite acquisition signal strength
received by the GPS antenna. You can also reset the GPS receiver by going into the 'GPS' menu from
the main menu screen and pressing 'RESET'.
Touch the 'GPS' icon on the main menu screen. Once in the GPS diagnostic screen, 'State' displays
the overall performance of the GPS antenna in terms of acquiring satellite signals. V indicates failure,
and 2D/3D indicates the performance is satisfactory for navigating. 'Satellite' indicates which satellite
signals are being acquired from all that are available. PDOP (Positional Dilution of Precision), HDOP
(Horizontal Dilution of Precision), and VDOP (Vertical Dilution of Precision) indicate the accuracy of
the acquired signal. At the bottom, cells with unique numbers represent the satellites, and graphic
bars show the current detailed status in obtaining a signal from each satellite.
Brightness
The XNAV3500P brightness is set to a default setting of medium. You may select another level by
using any of three available brightness settings.
Touch the 'BRIGHTNESS' icon on the main menu screen. Three icons will appear, each indicating a
different degree of brightness. The one at the left provides the darkest LCD, the middle gives a
moderately lit LCD, and the right produces the brightest LCD screen. Tap the desired level to change
the brightness. Touch the 'OK' button to exit, or undo the change by tapping 'Cancel '.
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