EFD1000 Installation Manual
DOCUMENT # A-01-126-00 PAGE 79-225 Revision H
© Copyright 2009 Aspen Avionics Inc.
8.2.5 Autopilot
Lateral Deviation Output
A low level lateral deviation output that is connected to an autopilot lateral deviation
(RT/LT) input. The low side of the differential output is referenced to ground. Before
connecting this output verify the receiving equipment’s left/right input can
accommodate a ground potential on the low side.
Lateral Deviation: ±150mVdc for ± 10º of course error
Sense: Positive voltage for fly right
Load: Will drive up to three 1000 ohm loads
Lateral Flag Output
A low level valid output to the autopilot indicating the Lateral (LT/RT) signal from the
ACU is valid.
Valid: 0.4 to 0.8Vdc
Invalid: Less than 0.05Vdc
Load: Will drive up to three 1000 ohm loads
Vertical Deviation Output
A low level vertical deviation output that is connected to an autopilot vertical (UP/DN)
input. The low side of the differential output is referenced to ground.
Output Voltage: ±150mVdc nominal, tracks the glide slope deviation input
signal to within 5%
Loading: Up to three 1000 ohm loads
Vertical Flag Output
A low level output to the autopilot indicating the UP/DN from the ACU is valid.
Valid: 0.4 to 0.8Vdc
Invalid: Less than 0.05Vdc
Load: Will drive up to three 1000 ohm loads
ILS Energize Output
Active low output to an autopilot when an ILS is selected or GPS approach is active.
ILS/GPS APPR Active: Sink to ground
ILS/GPS APPR Inactive: Open
Load Current: 100ma maximum
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