System Maintenance Manual

Page 3-2 G1000/GFC700 System Maintenance Manual – C90A/C90GT/C90GTi King Air
Revision F 190-00682-01
Figure 3-2. GDU 1500 Control Interface
3.1.1 Softkeys
Some pages have commands or selections that are activated by the GDU 1040 softkeys. If a softkey is
associated with a command, that command will be displayed directly above the key. A grayed-out
softkey shows a command that is unavailable. A softkey that is highlighted shows the current active
selection.
Figure 3-3. G1000 Softkeys
3.1.2 FMS Knob
The FMS knob shown in Figure 3-1 and Figure 3-4is the primary control for the G1000 system.
• To cycle through different configuration screens:
To change page groups:
Rotate the large FMS knob.
To change pages in a group:
Rotate the small FMS knob.
• To activate the cursor for a page, press the small FMS knob directly in, as one would push a
regular button.
• To cycle the cursor through different data fields, rotate the large FMS knob.
• To change the contents of a highlighted data field, rotate the small FMS knob. This action either
brings up an options menu for the particular field, or in some cases allows the operator to enter
data for the field.
• To confirm a selection, press the ENT key.
• To cancel a selection, press the small FMS knob in again, deactivating the cursor. The CLR key
may also be used to cancel a selection or deactivate the cursor.