Garmin Apollo CNX80 Installation Manaul - page 111
Post-Installation Configuration & Checkout
GNS 480 (CNX80) Installation Manual
560-0982-01 Rev L
3-31
NOTE
This checkout must be completed with the aircraft moved away from hangars and other
structures that may obstruct the view of the satellites.
3.3.2.1.1
Initial Power-Up
The first time the GNS 480 is used after it is installed, the GPS seed position, UTC time and date must be
entered. Following the display of the main start-up screen, the screen shown in Figure 3-30 will be
displayed for 10 seconds. Press the
CHG smart key to allow the position to be edited. The latitude
(degrees) will be highlighted. Use the large, outer knob to select the next or previous editable data field
and turn the small, inner knob to change the current setting. When the position, UTC time and date have
been entered, press the
MENU/ENTER key to accept the entries. The Master GPS Reset must be set to
‘No’.
NOTE
The latitude and longitude must be within one degree of the actual position, and the UTC
time (not local time) must be within one minute. If position, time and date are not entered
correctly, GPS acquisition may take up to 20 minutes.
Figure 3-30. GPS Information Start-up Screen
If the exact position is not known, the GNS 480 can determine its own initial position. If it is desired to let
the GNS 480 determine its own position, do not enter the position, time and date after the
CHG smart key
is pressed. Instead, use the use the large, outer knob to select the Master GPS Reset item and set it to
‘Yes’ using the small, inner knob. Press the
MENU/ENTER key to accept the changes, and then press the
MENU/ENTER key again to acknowledge the STOP! message.
NOTE
GPS acquisition may take up to 20 minutes after a Master GPS Reset is performed.