Garmin GNC 420A Installation Manual page 91

TO-FROM
Selection
FROM
Hidden
TO
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.
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
GPS
VLOC
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.
OBI SOURCE (GNS 430 Only)
Selection
Always GPS
Track CDI
V-FLAG STATE
Selection
Declutter
Normal
400 SERIES INSTALLATION MANUAL
P/N 190-00140-02
Verify That:
The FROM flag is in view.
The TO/FROM flag is hidden.
The TO flag is in view.
NOTE
Description
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.
The GNS 430 CDI button is in the VLOC state, and the VLOC
ANNUNCIATE output is active.
NOTE
Description
The MAIN King Serial OBI outputs are always GPS. This is useful if it is
desired to switch a Bendix/King KI 229 or KNI 582 RMI pointer
independently from the GNS 430 CDI button.
The MAIN King Serial OBI outputs are GPS or VOR, and switchable by the
GNS 430 CDI button. This is useful if it is desired the Bendix/King KI 229
or KNI 582 RMI pointer to display the same navigation source as the GNS
430 CDI outputs.
Description
The vertical deviation bar is parked in the full-scale up position when GPS or
VOR navigation is selected for output. The exception is when the CDI is in
VLOC mode and an ILS frequency is tuned, in which case the vertical
deviation bar parks in the centered position.
The vertical deviation bar parks in the centered position whenever it is
flagged.
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