190-00709-00 Rev. A
Garmin G1000 Pilot’s Guide for the Socata TBM 850
1-29
SYSTEM OVERVIEW
• SBAS Selection (
SBAS
Softkey is selected)(WAAS capable systems only)
In certain situations, such as when the aircraft is outside or on the fringe of the WAAS coverage area, it may
be desireable to disable WAAS (although it is not recommended). When disabled, the SBAS field in the GPS
Status box indicates DISABLED.
Disabling WAAS
1)
Select the GPS Status Page.
2)
If necessary, select the
SBAS
Softkey.
3)
Press the
FMS
Knob. ‘WAAS’ is highlighted.
4)
Press the
ENT
Key to uncheck the box.
5)
Press the
FMS
Knob to remove the cursor.
• GPS Satellite Signal Strengths
The GPS Status Page can be helpful in troubleshooting weak (or missing) signal levels due to poor satellite
coverage or installation problems. As the GPS receiver locks onto satellites, a signal strength bar is displayed
for each satellite in view, with the appropriate satellite PRN number (01-32 or 120-138 for WAAS) below each
bar. The progress of satellite acquisition is shown in three stages, as indicated by signal bar appearance:
- No bar—Receiver is looking for the indicated satellite
- Hollow bar—Receiver has found the satellite and is collecting data
- Light blue bar—Receiver has collected the necessary data and the satellite signal can be used
- Green bar—Satellite is being used for the GPS solution
- Checkered bar—Receiver has excluded the satellite (Fault Detection and Exclusion)
- “D” indication—Denotes the satellite is being used as part of the differential computations
Each satellite has a 30-second data transmission that must be collected (signal strength bar is hollow) before
the satellite may be used for navigation (signal strength bar becomes solid).
1.7 ACCESSING G1000 FUNCTIONALITY
MENUS
The G1000 has a
MENU
Key that, when pressed, displays a context-sensitive list of options.
This options list
allows the user to access additional features or make settings changes which specifically relate to the currently displayed
window/page.
There is no all-encompassing menu.
Some menus provide access to additional submenus that are used
to view, edit, select, and review options. Menus display ‘NO OPTIONS’ when there are no options for the window/page
selected.
The main controls used in association with all window/page group operations are described in section
1.3. Softkey selection does not display menus or submenus.
To navigate the Page Menu Window:
1)
Press the
MENU
Key to display the Page Menu Window.
2)
Turn the
FMS
Knob to scroll through a list of available options (a scroll bar appears to the right of the window
when the option list is longer than the window).
3)
Press the
ENT
Key to select the desired option.
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