EFD1000 Installation Manual
DOCUMENT # A-01-126-00 PAGE 77-225 Revision H
© Copyright 2009 Aspen Avionics Inc.
8.2.3 VLOC Receiver
NAV Composite Input
An input connected to the composite output of a VHF Navigation receiver.
Nominal Input: 0.5Vrms VOR
0.35Vrms Localizer
Input Impedance: 10K ohms
ILS Energize Discrete Input
Low impedance to ground supplied from a Navigation receiver when it is tuned to a
localizer frequency.
Active: Less than 500 ohms to ground or less than 1.5Vdc
Inactive: Open circuit sinking less than 1 ma to ground at 28Vdc
Glide Slope Deviation Input
A low level differential input that accepts a glide slope signal from an external VHF Nav
receiver.
Input Range: ±150mVdc full scale
Max Input Range: ±300mVdc
Load: 1000 ohm
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
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: 26Vac max (H to C)
Excitation Frequency: 20Hz to 5000Hz
Output Format: Sine (D and E), Cosine (F and G)
Output Gradient: Excitation * 0.408 (26Vac in = 10.6Vac out)
DC Offset: 0Vdc to +5Vdc (Offset applied to Rotor C)
To Next Page
Loading...
