Figure 3-9. Miscellaneous; Figure 3-10. Measurement Of - Garmin GNS 480 Installation Manaul

Post-Installation Configuration & Checkout
received from the fuel device, the fuel will only be accumulated for the left engine and fuel remain
computed based on only that flow. If TWIN is selected but the serial configuration is FUEL, the ENGINE
configuration will be changed back to SINGLE on entering airborne mode is entered.
Press the PARALLEL P line select key to toggle between PREFIX and SUFFIX. If PREFIX is selected
the GNS 480 will prepend a 'p' to parallel track Waypoint Identifiers. MapMX and MAPCOM RS-232
outputs will prepend the 'p' and truncate Identifier at five characters. If SUFFIX is selected the GNS 480
will append a 'p' to parallel track Waypoint Identifiers. MapMX RS-232 output will not append the 'p' to
waypoint identifier, MAPCOM RS-232 output will append the 'p' to the parallel track Waypoint
Identifiers and replace the fifth character if the Identifier is already five characters in length.
The Misc Setup page is shown in Figure 3-9.
It may be necessary to disable (IGNORE) the GNS 480 CDI select key for installations
with certain EFIS systems, where the navigation sensor selection must be accomplished
on the EFIS or its control panel.
3.2.1.7 GPS Vertical Offset Setup
The GPS Vertical Offset setup function is used to enter the height above ground of the GPS antenna. Prior
to proceeding, measure the GPS antenna vertical offset (to the nearest foot) as shown in Figure 3-10.
While on the Ground Maintenance SETUP menu Page 2, press the GPS line select key. The GPS
Vertical Offset setup page is shown in Figure 3-11.
3-10
NOTE
Figure 3-9. Miscellaneous Setup Items
Figure 3-10. Measurement of GPS Vertical Offset
560-0982-01 Rev L GNS 480 (CNX80) Installation Manual