Vor/Ils Indicator (Gns 430 Only) - Garmin GNC 420A Installation Manual

4.8

VOR/ILS INDICATOR (GNS 430 ONLY)

4.8.1 VOR/ILS Indicator Function
Because the GNS 430 includes a "CDI" button that performs switching between GPS and VOR/ILS on a
remote indicator, it is seldom necessary to use these outputs to drive an indicator. It is only necessary
when it is desired for a separate indicator to display VOR/ILS deviation full-time (regardless of the "CDI"
button status).
The VOR/ILS indicator displays both lateral and vertical, To/From indications, lateral and vertical flags
and superflags. GNS 430 connector 4006 always outputs the VOR/Localizer/Glideslope navigation
information. The VOR/ILS pins on GNS 430 connector 4006 are used to drive an indicator that displays
VOR/ILS information at all times, regardless of the CDI selection on the GNS 430.
VOR/LOC COMPOSITE OUT is a standard VOR/Localizer Composite output signal which may be used
to drive the Left/Right, TO/FROM, and Flag indications of certain navigation indicators that contain an
internal converter.
The ILS ENERGIZE output goes low when the VLOC frequency is channeled to a localizer channel.
4.8.2 VOR/ILS Indicator Electrical Characteristics
4.8.2.1 Superflags
Pin Name
VOR/LOC SUPERFLAG
GLIDESLOPE SUPERFLAG
The output supplies not less than 500 mA on a 28 volt system and 250 mA on a 14 volt system with the
output voltage not less than (AIRCRAFT POWER - 3 V
output voltage with respect to ground is less than 3 V
4.8.2.2 Deviation
Pin Name
VOR/LOC +LEFT
VOR/LOC +RIGHT (VOR/LOC COMMON)
GLIDESLOPE +UP
GLIDESLOPE +DOWN/-FLAG (GLIDESLOPE
COMMON)
The deviation outputs are each capable of driving up to three 1000 Ω meter loads with ±150 mV
with respect to 2.5V Common for full-scale deflection. The drive circuit provides for more than full-scale
deflection with a maximum course deviation output voltage of ±300 mV
4.8.2.3 TO/FROM
Pin Name
VOR/LOC +TO
VOR/LOC +FROM (VOR/LOC COMMON)
The output is capable of driving up to three 200 Ω meter loads. When indicating TO, the output is
+225 ±75 mV When indicating FROM, output is -225 ±75 mV
DC.
(Flag IN VIEW) the TO/FROM output is 0 ±10 mV
Page 4-16
Page Rev L
NOTE
Connector
P4006
P4006
) when the flag is to be OUT OF VIEW. The
DC
when the flag is to be IN VIEW.
DC
Connector
P4006
P4006
P4006
P4006
±10%.
DC
Connector
P4006
P4006
When invalid information is present
DC.
DC.
400 SERIES INSTALLATION MANUAL
Pin I/O
15 Out
38 Out
Pin I/O
5 Out
6 Out
32 Out
31 Out
±10%
DC
Pin I/O
1 Out
2 Out
P/N 190-00140-02