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Page 4-18
400W Series Installation Manual
Rev. G
190-00356-02
4.8
VOR/ILS Indicator (GNS 430W Only)
4.8.1
VOR/ILS Indicator Function
NOTE
Because the GNS 430W 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 430W connector P4006 always outputs the VOR/Localizer/Glideslope navigation
information. The VOR/ILS pins on GNS 430W connector P4006 are used to drive an indicator that
displays VOR/ILS information at all times, regardless of the CDI selection on the GNS 430W.
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
Connector
Pin
I/O
VOR/LOC SUPERFLAG
P4006
15
Out
GLIDESLOPE SUPERFLAG
P4006
38
Out
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 VDC) when the flag is to be OUT OF VIEW. The
output voltage with respect to ground is less than 3 VDC when the flag is to be IN VIEW.
4.8.2.2 Deviation
Pin Name
Connector
Pin
I/O
VOR/LOC +LEFT
P4006
5
Out
VOR/LOC +RIGHT (VOR/LOC COMMON)
P4006
6
Out
GLIDUP
P4006
32
Out
GLIDDOWN/-FLAG (GLIDESLOPE
COMMON)
P4006 31
Out
The deviation outputs are each capable of driving up to three 1000
Ω
meter loads with
±
150 mVDC
±
10% 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 mVDC
±
10%.
4.8.2.3 TO/FROM
Pin Name
Connector
Pin
I/O
VOR/LOC +TO
P4006
1
Out
VOR/LOC +FROM (VOR/LOC COMMON)
P4006
2
Out
The output is capable of driving up to three 200
Ω
meter loads. When indicating TO, the output is +225
±75 mVDC. When indicating FROM, output is -225 ±75 mVDC. When invalid information is present
(Flag IN VIEW) the TO/FROM output is 0 ±10 mVDC.
Содержание GNC 420AW
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