VOR/MARKER BEACON RECEIVER

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.

COMPONENT LOCATIONS

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.

INTERFACES

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.

VOR/MARKER BEACON RECEIVER

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 position. The marker beacon receiver receives 75 MHz signals.

Date: 2015-12-17; view: 2291