190-01115-01 G3X/G3X Touch Installation Manual - GDU 37X Config and Post Install Checkout
Rev. AC Page 33-111
33.4.15 GPS Configuration Page
The GPS Configuration Page allows selecting the GPS source for each GDU. Each installed GDU can
select either the GPS antenna directly connected to that GDU, or ‘No GPS Antenna Connected’. If ‘No
GPS Antenna Connected’ is selected, that GDU will use GPS data from the GDU that is connected to a
GPS Antenna. Only one GDU need be connected to a GPS Antenna, that GDU will “share” the GPS info
will all other GDUs.
‘No GPS Antenna Connected’ may also be selected if a GPS 20A is used for GPS position. A GPS 20A
provides GPS data to the GDU(s), so the GDU(s) do not require being connected to a GPS antenna.
For installations w/out a GPS 20A, failure of a single GDU or GPS antenna (in a multi-
display/multi-antenna installation) would cause the system to use GPS information from
the remaining functional GDU. If no GPS data is available from any operating GDU, the
remaining GDUs will use GPS position data from an external GPS navigator (GNS 400/
500, GNS 480, or GTN 600/700 series unit, see Section 26.2
or Section 27.2). Accuracy
will be degraded when using an external GPS navigator.
1. In configuration mode, use the FMS Joystick to select the GPS Page.
2. Use the FMS Joystick to select the desired configurable item and make the desired change. Then
press the ENT Key or use the FMS Joystick to select the next item. Press the FMS Joystick to
move the cursor to the page selection menu when finished.
If an external GPS navigator (see Section 2.5.1
) is configured, the GPS config page displays "Select
External GPS At Powerup". This setting controls whether the user's choice to use the internal GPS nav
source will be retained between power cycles (disabled), or if the system should always return to using the
configured external GPS nav source at powerup (enabled).
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