Garmin GTN 635 Installation Manual page 78

5.2.16.2 VOR/ILS Indicator Electrical Characteristics
5.2.16.2.1 Superflags
VOR/LOC SUPERFLAG
GLIDESLOPE SUPERFLAG
The output supplies not less than 320 mA with the output voltage not less than (AIRCRAFT POWER -2
VDC) when the flag is to be OUT OF VIEW. The output voltage with respect to ground is less than 250
mVDC when the flag is to be IN VIEW.
5.2.16.2.2 Deviation
VOR/LOC +LEFT
VOR/LOC +RIGHT
GLIDESLOPE +UP
GLIDESLOPE +DOWN
The deviation output is capable of driving up to three 1000 loads with 150 mVDC 15 mVDC for full-
scale deflection, 0 mVDC 4.5 mVDC when centered. The drive circuit provides for more than full-scale
deflection with a maximum course deviation output voltage of ±300 mVDC 30 mVDC.
5.2.16.2.3 TO/FROM
VOR/LOC +TO
VOR/LOC +FROM
The output is capable of driving up to three 200 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.
5.2.16.2.4 Flag
VOR/LOC +FLAG
VOR/LOC -FLAG
GLIDESLOPE +FLAG
GLIDESLOPE -FLAG
The Flag output is capable of driving up to three 1000 meter loads. When valid information is present
(Flag OUT OF VIEW) the Flag output is 375 ±80 mV DC. When invalid information is present (Flag IN
VIEW) the Flag output is 0 ±25 mV DC.
5.2.16.2.5 OBS
VOR OBS ROTOR C
VOR OBS ROTOR H (GND)
VOR OBS STATOR D
VOR OBS STATOR E (GND)
VOR OBS STATOR F
VOR OBS STATOR G (GND)
VOR OBS ROTOR C and H are a buffered 400 Hz output that is intended to drive the OBS rotors. VOR
OBS STATOR D and VOR OBS STATOR F are each phase and amplitude shifted version of the VOR
ROTOR C output. Each pair is intended to read one of the two windings of the indicator's OBS stator.
Page 5-22
Rev. C
Pin Name
Pin Name
Pin Name
Pin Name
Pin Name
Connector Pin
P1004 15
P1004 38
Connector Pin
P1004 5
P1004 6
P1004 34
P1004 55
Connector Pin
P1004 1
P1004 2
Connector Pin
P1004 3
P1004 4
P1004 32
P1004 53
Connector Pin
P1004 9
P1004 10
P1004 13
P1004 11
P1004 12
P1004 14
GTN 625/635/650 TSO Installation Manual
I/O
Out
Out
I/O
Out
Out
Out
Out
I/O
Out
Out
I/O
Out
Out
Out
Out
I/O
Out
--
In
--
In
--
190-01004-02