Rmi/Obi (Gtn 750 Only) - Garmin GTN 725 Installation Manual

4.3.15.2.6 VLOC COMPOSITE
VOR/LOC COMPOSITE OUT
With a standard VOR test signal applied, VOR/LOC COMPOSITE OUT is 0.5 ± 0.1 Vrms into a 10 k
load. With a standard Localizer centering test signal applied, VOR/LOC COMPOSITE OUT is 0.350
±0.05 Vrms into a 10 k load.
4.3.15.2.7 GLIDESLOPE COMPOSITE
GLIDESLOPE COMPOSITE OUT
With a standard glideslope test signal applied, GLIDESLOPE COMPOSITE OUT is 0.350 ±0.05 Vrms
into a 10 k load.
4.3.15.2.8 NAV ILS ENERGIZE
ILS ENERGIZE
The driver output voltage is not more than 1.0 V when sinking 20 mA. The maximum off state leakage
current with respect to GND is less than 10 A.

4.3.16 RMI/OBI (GTN 750 only)

4.3.16.1 RMI/OBI Function
The VOR OBI output provides bearing information from the currently tuned VOR station for
Bendix/King Serial OBI devices based upon the GTN 750 VOR receiver. When a localizer channel is
tuned on the VLOC window, there is a bit in the data stream set to indicate that a localizer frequency is
tuned which stows the needle or drives it to the 3 o'clock position.
4.3.16.2 RMI/OBI Electrical Characteristics
VOR OBI CLOCK
VOR OBI SYNC
VOR OBI DATA
The output driver is active low. The driver output voltage is not more than 1.0 V when sinking 20 mA.
The maximum off state leakage current with respect to ground is less than 10 A.
GTN 725/750 TSO Installation Manual
190-01007-02
Pin Name
Pin Name
Pin Name
Pin Name
Connector Pin
P1004 8
Connector Pin
P1004 58
Connector Pin
P1004 29
Connector Pin
P1004 25
P1004 26
P1004 27
I/O
Out
I/O
Out
I/O
Out
I/O
Out
Out
Out
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Rev. A