EFD1000 E5 Dual Electronic Flight Instrument (EFI) Install Manual
DOCUMENT # 900-00041-001
PAGE 89-226
REVISION D
© Copyright 2019 Aspen Avionics Inc.
8.2.3.4
Glide Slope Flag Input
A low level valid input from an external VHF Navigation receiver.
Valid: ............................ Greater than 260mV across a 1000-ohm load
Invalid: .......................... Less than 100mV across a 1000 ohm load
8.2.4
GPS Receiver
8.2.4.1
OBS Sine, Cosine, Rotor
An OBS resolver output for GPS receivers that require an OBS input. The resolver
output electrical zero is set to +60º (300º ORZ) for compatibility with most legacy
resolvers. The ACU accommodates OBS excitation with DC offset.
Excitation Amplitude: .... 5Vac min to 26Vac max (H to C)
Excitation Frequency: .... 30Hz to 5000Hz
Output Format: ............. Sine (D and E), Cosine (F and G)
Output Gradient: ........... Excitation * 0.401 (26Vac in = 10.4Vac out)
DC Offset: ..................... 0Vdc to +5Vdc (Offset applied to Rotor C)
8.2.4.2
TO/ FROM FLAG Input
Differential input from a GPS receiver indicating whether flying TO or FROM the active
waypoint.
TO the waypoint: ........... +40mV or greater
FROM the waypoint: ...... -40mV or greater
8.2.4.3
LEFT/ RIGHT Input
Differential input from a GPS receiver indicating LEFT or RIGHT of GPS course.
Input Range: ................. ±150mVdc full scale
Load: ............................ 1000 ohm
8.2.4.4
Lateral Flag Input
Validity flag from the GPS receiver indicating valid LEFT and RIGHT data.
Valid: ............................ 260mV to 800mVdc
Invalid: .......................... Less than 260mVdc
8.2.4.5
Vertical Deviation Input
Differential input from a GPS receiver indicating a fly UP or DOWN command.
Input Range: ................. ±150mVdc full scale
Load: ............................ 1000 ohm
8.2.4.6
Vertical Deviation Flag Input
Validity flag from the GPS receiver indicating valid UP and DOWN data.
Valid: ............................ 260mV to 800mVdc
Invalid: .......................... Less than 260mVdc
8.2.4.7
OBS/ LEG (HOLD) Input
Active low discrete input from a GPS receiver when in the OBS or HOLD mode.
