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* RF - radio frequency
* rly - relay
* R/T - receive/transmit
* spkr - speaker
* sta - station
* TCAS - traffic alert and collision avoidance system
* TFR - transfer
* TX - transmitter
* V - voice
* V - volts
* VHF - very high frequency
* xfr - transfer
DISTANCE MEASURING EQUIPMENT - INTRODUCTION
EFFECTIVITY
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* xmtr - transmitter
* xpndr - transponder
DISTANCE MEASURING EQUIPMENT - INTRODUCTION
EFFECTIVITY
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DISTANCE MEASURING EQUIPMENT - INTRODUCTION
DISTANCE MEASURING EQUIPMENT - INTRODUCTION
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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General
The DME system has two DME interrogators and two antennas.
Description
The interrogators get manual tune inputs and flight
management computer system (FMCS) autotune inputs from
the navigation control panel. If the NAV control panel tune
inputs fail, the interrogators get autotune inputs directly from
the FMC.
The DME system sends data to the display electronics units to
show on the primary flight displays (PFDs) and navigation
displays (NDs).
The DME system sends data to these units:
* Flight control computers (FCC)
* Flight management computer System (FMCS)
* Flight data acquisition unit (FDAU)
* Remote Electronics Unit (REU).
The FCCs use DME data as an input to calculate the VOR
capture point in the autopilot VOR mode. The DME data is also
used in the VOR mode to find when over station is sensed (OSS)
for the VOR ground station.
The FMCS uses DME data to calculate FMC position updates.
The flight data acquisition unit receives DME data, formats it,
and sends it to the flight data recorder.
The REU receives audio from the DME station and sends it to
the flight deck headsets and speakers.
The DME system sends and receives a suppression pulse
between these units:
* DME
* ATCs
* TCAS.
The DME interrogator receives the station audio identifiers and
sends them to the remote electronics unit (REU).
DME SYSTEM - GENERAL DESCRIPTION
EFFECTIVITY
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DME SYSTEM - GENERAL DESCRIPTION
DME SYSTEM - GENERAL DESCRIPTION
EFFECTIVITY
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General
These are the components in the flight compartment that have
an interface with the DME system:
* Left inboard and outboard display units
* Left and right EFIS control panels
* Right inboard and outboard display units
* Captain’s and first officer’s NAV control panel
* Captain’s and first officer’s audio control panel.
DME SYSTEM - COMPONENT LOCATION - FLIGHT COMPARTMENT
EFFECTIVITY
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DME SYSTEM - COMPONENT LOCATION - FLIGHT COMPARTMENT
DME SYSTEM - COMPONENT LOCATION - FLIGHT COMPARTMENT
EFFECTIVITY
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DME Component Locations
These components are in the electronics equipment
compartment:
* DME 1 interrogator
* DME 2 interrogator.
These components are on the exterior of the airplane:
* DME 1 antenna
* DME 2 antenna.
DME SYSTEM - COMPONENT LOCATION - ELECTRONIC EQUIPMENT COMPARTMENT AND ANTENNAS
EFFECTIVITY
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