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34 - NAVIGATION
34-53-00 ADF SYSTEM PRESENTATION
CONTENTS:
Principle
Components
Indicating
TMUADFF01 LEVEL 1
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ADF SYSTEM PRESENTATION
PRINCIPLE
The Automatic Direction Finder (ADF) is a radio
navigation aid.
The ADF system provides:
- An identification of the relative bearing to
a selected ground station called Non
Directional Beacon (NDB).
- Aural identification of the ground station.
The relative bearing is the angle between the aircraft
heading and the aircraft/ground station axis.
TMUADFF01-T01 LEVEL 1
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ADF SYSTEM PRESENTATION - PRINCIPLE
TMUADFF01-P01 LEVEL 1
EFFECTIVITY 34-53-00 Page 3
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ADF SYSTEM PRESENTATION
The combination of signals, received from two loop
antennae and from one omni-directional sense antenna,
provides bearing information.
The ground stations operate in a frequency range of
190 to 1750 Khz.
An additional Morse signal is provided to identify the
selected ground station.
TMUADFF01-T02 LEVEL 1
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TMUADFF01-P02 LEVEL 1
ADF SYSTEM PRESENTATION - PRINCIPLE
EFFECTIVITY 34-53-00 Page 5
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ADF SYSTEM PRESENTATION
COMPONENTS
The Automatic Direction Finder system is composed of
two receivers and two antennae.
The ADF system is also connected to:
- Navigation Displays (ND) and Digital Distance
Radio Magnetic Indicator (DDRMI) for display.
- Electronic Flight Instrument System (EFIS)
panels for control display.
- Flight Management and Guidance Computer (FMGC)
for auto-tuning.
- Multipurpose Control Display Units (MCDU) for
manual tuning.
- Captain and First Officer Radio Management
Panels (RMP) for back-up tuning.
- Audio Control Panels (ACP) for ADF audio
signal.
Note: ADF 2 system is optional.
TMUADFF01-T03 LEVEL 1
EFFECTIVITY 34-53-00 Page 6
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MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
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ADF SYSTEM PRESENTATION - COMPONENTS
TMUADFF01-P03 LEVEL 1
EFFECTIVITY 34-53-00 Page 7
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ADF SYSTEM PRESENTATION
INDICATING
The Automatic Direction Finder (ADF) system
information can be displayed on the Navigation Displays
(ND) system and on the Digital Distance Radio Magnetic
Indicator (DDRMI).
On the NDs, depending on the position of the ADF
selector switch on the EFIS control panel:
- ADF 1 is represented by a single pointer
- ADF 2 is represented by a double pointer.
On the DDRMI, depending on the position of the ADF
selector switch:
- ADF 1 is represented by a single pointer
- ADF 2 is represented by a double pointer.
Note: Some DDRMIs are not equipped with the ADF
capability.
TMUADFF01-T04 LEVEL 1
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ADF SYSTEM PRESENTATION - INDICATING
TMUADFF01-P04 LEVEL 1
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TMUADFF01 LEVEL 1
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34 - NAVIGATION
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