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* NC - not connected
* ND - navigation display
* NORM - normal
* NVM - non-volatile memory
* OM - outer marker
* PFD - primary flight display
* R - range
* REU - remote electronics unit
* RF - radio frequency
* R/T - receive/transmit
* RCVR - receiver
* STA - station
* TFR - transfer
* V - voice
* V - volt
* VHF - very high frequency
* VOR - vhf omnidirectional ranging
MARKER BEACON SYSTEM - INTRODUCTION
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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MARKER BEACON SYSTEM - INTRODUCTION
MARKER BEACON SYSTEM - INTRODUCTION
EFFECTIVITY
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General
The marker beacon system has an antenna and a VOR/marker
beacon (VOR/MB) receiver. The marker beacon function only
operates in the VOR/MB receiver 1 position.
Operation
The marker beacon antenna receives the marker beacon
signals. The signals go to the VOR/MB receiver 1. The VOR/MB
receiver 1 supplies this data:
* Marker beacon audio to the remote electronics unit (REU)
* Marker beacon data to the common display system (CDS)
display electronics unit (DEU)
* Marker beacon data to the flight data acquisition unit (FDAU).
The displays show marker beacon data.
MARKER BEACON SYSTEM - GENERAL DESCRIPTION
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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MARKER BEACON SYSTEM - GENERAL DESCRIPTION
MARKER BEACON SYSTEM - GENERAL DESCRIPTION
EFFECTIVITY
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General
The marker beacon antenna is on the bottom of the fuselage.
The VOR/MB receiver 1 is in the electronic equipment
compartment E1-2.
The marker beacon data shows on these display units:
* Left outboard display unit
* right outboard display unit.
MARKER BEACON SYSTEM - COMPONENT LOCATIONS
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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MARKER BEACON SYSTEM - COMPONENT LOCATIONS
MARKER BEACON SYSTEM - COMPONENT LOCATIONS
EFFECTIVITY
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Power
The VOR/marker beacon (VOR/MB) receiver 1 uses 115v ac
power from the standby bus.
Antenna Interface
The marker beacon antenna sends radio frequency (RF) signals
to the VOR/MB receiver 1.
PSEU
The proximity switch electronics unit (PSEU) supplies an air/
ground discrete signal to the VOR/MB receiver 1. The VOR/MB
receiver uses this signal for these functions:
* Prevent a test in the air
* Count flight legs.
Audio Interface
The VOR/MB receiver 1 sends marker beacon audio to the
remote electronics unit (REU). The REU supplies marker
beacon audio to the flight compartment.
Marker Beacon Data
The VOR/MB receiver 1 supplies marker beacon data to the 1
and 2 common display system (CDS) display electronics units
(DEU). The receiver also supplies marker beacon data to the
FDAU.
MARKER BEACON SYSTEM - INTERFACES
EFFECTIVITY
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MARKER BEACON SYSTEM - INTERFACES
MARKER BEACON SYSTEM - INTERFACES
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
34-32-00-004
General
The VOR/marker beacon (VOR/MB) receiver has these two
parts:
* VOR receiver
* Marker beacon receiver.
The marker beacon system operates in the VOR/MB receiver 1
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