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MARKER BEACON SYSTEM
General
The marker beacon system supplies visual and aural indications when the airplane flies over airport runway marker beacon transmitters.
Abbreviations and Acronyms
· A/P - autopilot
· AC - alternating current
· ACP - audio control panel
· ALT - alternate
· AMP - amplifier
· B - both
· BITE - built-in test equipment
· CDS - common display system
· DEU - display electronics unit
· DME - distance measuring equipment
· FDAU - flight data acquisition unit
· DU - display unit
· FT - functional test
· GND - ground
· Hz - hertz
· I/C - intercom
· ILS - instrument landing system
· IM - inner marker
· I/O - input/output
· LCD - liquid crystal display
· LED - light emitting diode
· LRU - line replaceable unit
· MAINT - maintenance
· MB - marker beacon
· MHz - mega hertz
· MM - middle marker
· NAV - navigation
· 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 
GENERAL DESCRIPTION
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.
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