Garmin GNC 420, Installation Manual, Page: 60 / 136

Page 5-10 400 SERIES INSTALLATION MANUAL
Rev Q 190-00140-02
NAV FLAG (LAT/VERT)
Selection Verify That:
Hidden The LAT/VERT flag is hidden.
In view The LAT/VERT flag is in view.
TO-FROM
Selection Verify That:
FROM The FROM flag is in view.
Hidden The TO/FROM flag is hidden.
TO
The TO flag is in view.
SELECTED COURSE
Select 150° on the CDI/HSI that is connected to the 400 Series unit’s MAIN OBS inputs. The
SELECTED COURSE field indicates near to 150° and a Calibrate to 150°? field appears. Selecting this
field calibrates the 400 Series unit to match the input source. Verify OBS operation by checking that the
course displayed on the 400 Series unit is within 2° of the selected course. Do this at 30° intervals around
the OBS card.
NOTE
If it is desired to ignore a selected course input (either analog resolver or ARINC 429)
for GPS operation in OBS mode, press MENU on the MAIN CDI/OBS CONFIG page
and select “Ignore SEL CRS for GPS?”. When OBS mode is selected, the selected
course is entered on the controls of the 400 Series unit. If ignoring the selected course
input such that the VOR valid flag is dependent only on a valid VOR signal, with lateral
deviation calculated by another display device, press MENU on the MAIN CDI/OBS
CONFIG page and select “Ignore SEL CRS for VLOC?”.
CDI (GNS 430 Only)
Selection Description
GPS The GNS 430 CDI button is in the GPS state, and the GPS ANNUNCIATE
output is active. This annunciator output may be required to be active for
some installations.
VLOC The GNS 430 CDI button is in the VLOC state, and the VLOC
ANNUNCIATE output is active.
NOTE
If it is desired to disable the GNS 430 CDI key, press MENU on the MAIN CDI/OBS
CONFIG page and select “Ignore CDI Key?”. This causes the field above the CDI key
to always display GPS, regardless of CDI key presses. This may be necessary for certain
EFIS systems where navigation sensor selection must be accomplished on the EFIS or its
control panel.