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Nov 30/95
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 375
ALL
DME SYSTEM PRESENTATION
PRINCIPLE
The Distance Measuring Equipment (DME) provides
digital readout of the aircraft slant range distance
from a selected ground station.
The system generates interrogation pulses from an
onboard interrogator and sends them to a selected
ground station.
After a 50 micro seconds delay, the ground station
replies.
The interrogator determines the distance in Nautical
Miles (NM) between the station and the aircraft.
The interrogator detects the Morse audio signal which
identifies the ground station.
TMUDMEH01-T01 LEVEL 1
EFFECTIVITY 34-51-00 Page 2
Nov 30/95
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 376
ALL
DME SYSTEM PRESENTATION - PRINCIPLE
TMUDMEH01-P01 LEVEL 1
EFFECTIVITY 34-51-00 Page 3
Nov 30/95
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 377
ALL
DME SYSTEM PRESENTATION
COMPONENTS
The components are two antennae and two interrogators.
The DME system is also connected to:
- Primary Flight Displays (PFD), Navigation
Displays (ND) and Digital Distance Radio
Magnetic Indicator (DDRMI) for display.
- Electronic Flight Instrument System (EFIS)
control unit for display control.
- Flight Management and Guidance Computers (FMGC)
for tuning (manual and auto).
- Captain and F/O Radio Management Panels (RMP)
for back-up tuning.
- Audio Control Panels (ACPs) for DME audio
signal.
TMUDMEH01-T02 LEVEL 1
EFFECTIVITY 34-51-00 Page 4
Nov 30/95
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 378
ALL
DME SYSTEM PRESENTATION - COMPONENTS
TMUDMEH01-P02 LEVEL 1
EFFECTIVITY 34-51-00 Page 5
Nov 30/95
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 379
ALL
DME SYSTEM PRESENTATION
INDICATING
The DME distance is shown on the Primary Flight Display
(PFD) (if ILS/DME) and on the Navigation Display (ND)
(if VOR/DME).
The DME distance is also shown on the two windows of
the Digital Distance Radio Magnetic Indicator (DDRMI).
TMUDMEH01-T03 LEVEL 1
EFFECTIVITY 34-51-00 Page 6
Nov 30/95
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 380
ALL
DME SYSTEM PRESENTATION - INDICATING
TMUDMEH01-P03 LEVEL 1
EFFECTIVITY 34-51-00 Page 7
Nov 30/95
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 381
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TMUDMEH01 LEVEL 1
EFFECTIVITY 34-51-00 Page 8
Nov 30/95
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 382
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34 - NAVIGATION
34-51-00 DME DESCRIPTION/OPERATION
CONTENTS:
General
Auto Tuning
Manual Tuning
Back Up Tuning
Antenna
Users
Suppressor
AMU
LGCIU
Indicating
CFDIU
Self Examination
TMUDMEA01 LEVEL 3
EFFECTIVITY 34-51-00 Page 1
Apr 30/98
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 383
ALL
DME DESCRIPTION/OPERATION
GENERAL
The Distance Measuring Equipment (DME) Sytem includes:
- 2 DME Interrogators,
- 2 DME Antennae.
AUTO TUNING
In normal operation each Flight Management Guidance
Computer (FMGC) automatically tunes its ownside DME
interrogator through its ownside Radio Management
Panel (RMP) via port A.
When the FMGC fails, the DME receives a discrete signal
through the RMP to automatically select port B.
With failure of one FMGC the other FMGC can control
the DME interrogators, one directly, the other through
its RMP.
MANUAL TUNING
From each Multipurpose Control and Display Unit (MCDU)
both DMEs can be manually tuned through their ownside
FMGC (via port A).
BACK UP TUNING
In case of dual FMGC failure the RMPs enable BACK-UP
tuning.
ANTENNA
　
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